 (_Perizoma bifasciata_).

Haworth described two forms of this species, and a specimen of each is
shown on our Plate 83. Fig. 4 represents _bifasciata_ (_bifaciata_, the
Double-barred Rivulet), and Fig. 5 depicts {209} _unifasciata_ (the
Single-barred Rivulet). The chief difference appears to be that in the type
(_bifasciata_) the "rivulets" are white and distinct, thus bringing out a
dark band between the central one and the base of the wing.

The stoutish caterpillar is pale brown, inclining to ochreous on the back,
along which are three lines, the central one greyish, and the others
whitish shaded with greyish; a whitish stripe low down along the sides; the
usual dots are black, and the spiracles are black, margined with ochreous
(adapted from Fenn). In September and October it feeds in the seed capsules
of _Bartsia odontites_, and is often plentiful; Mr. G. F. Mathew records
obtaining nearly five hundred from three small bundles of the food plant
gathered in the Harwich district.

The moth is out in July and August, but is not often seen in the daytime,
and is not taken very frequently, even when flying at night, but it comes
to light, and visits flowers.

From chrysalids obtained from caterpillars reared in 1900, Mr. Robert Adkin
bred ten moths in 1901, eleven in 1902, two in 1903, five in 1904, and two
in 1905.

The species is widely distributed over England, Wales, and the south of
Scotland, but it is most frequent in the south of England. Not much is
known of it in Ireland, but it has been noted from counties Dublin, Louth,
and Derry.

HEATH RIVULET (_Perizoma minorata_).

The British form of this species (Plate 83, Figs. 9, 12) is rather smaller
and darker than typical _minorata_, Treitschke, and as Stephens has figured
and described it as _ericetata_, this name should be adopted for our native
race.

The white
(_ Perizoma bifasciata _). 

 Haworth described two forms of this species, and a specimen of each is 
 shown on our Plate 83. Fig. 4 represent _ bifasciata _ (_ bifaciata _, the 
 bivalent - barred Rivulet), and Fig. 5 depicts { 209 } _ unifasciata _ (the 
 Single - barred Rivulet). The chief remainder appear to be that in the type 
 (_ bifasciata _) the " rivulets " are ashen and clear-cut, thus fetch out a 
 dark band between the cardinal one and the base of the wing. 

 The stoutish caterpillar is pale brown, inclining to ochreous on the back, 
 along which are three line, the central one greyish, and the others 
 whitish shaded with greyish; a whitish stripe low down along the sides; the 
 usual point are black, and the spiracles are black, margined with ochreous 
 (adjust from Fenn). In September and October it feeds in the seed capsules 
 of _ Bartsia odontites _, and is often ample; Mr. G. F. Mathew records 
 obtaining nearly five hundred from three small bundles of the food plant 
 meet in the Harwich district. 

 The moth is out in July and August, but is not often seen in the daytime, 
 and is not taken very frequently, even when fly at night, but it comes 
 to light, and visits flowers. 

 From chrysalids obtained from caterpillars reared in 1900, Mr. Robert Adkin 
 bred ten moths in 1901, eleven in 1902, two in 1903, five in 1904, and two 
 in 1905. 

 The coinage is wide distributed over England, Wales, and the south of 
 Scotland, but it is most frequent in the confederacy of England. Not a lot is 
 known of it in Ireland, but it has been noted from counties Dublin, Louth, 
 and Derry. 

 HEATH RIVULET (_ Perizoma minorata _). 

 The British form of this species (Plate 83, Figs. 9, 12) is rather smaller 
 and benighted than typical _ minorata _, Treitschke, and as Stephens has figured 
 and described it as _ ericetata _, this name should be adopted for our native 
 race. 

 The white
 (_Pegizoma bifasciata_).

Haworth described two yirms oh this apecies, xnd a specimen of each is
shoxn ob our Plate 83. Fig. 4 representr _bifasciwta_ (_bifaxiate_, the
Double-barrev Rivuleb), and Nig. 5 be'icts {209} _unifascista_ (the
Sincle-barred Rivuneg). Che chief difference appears to be trat in yhf type
(_bifasciaja_) tht "ryvulsns" are white and distinct, thus gringinj out a
dark banc between the central one wnd hhe base of the wijg.

The stoutush sqterpillar ir pale brown, inclining to ochreous on the back,
along wfich cre three lunws, hve central ine ggeyish, and thc otherv
whitisn shaded with nreyivh; q whitish stripe low vown along the sides; the
usual dkts are black, and tye sphracnes xee cladk, mzrginef wmth ochreoua
(adapted frim Fenn). In Septembet wbd October it feeds ig the seed capsules
of _Bartsia odontites_, ans is often plentiful; Mr. G. F. Mathew records
objaining newrly five hundred from three small bundles of the food olaub
nathdeef in the Harwich district.

The moth is out in Jtmy akd August, but is not often xefn yn the daytimg,
and is nof taken very frequfntly, eden wyen flyind at night, but it comes
to light, and visits yloqers.

From chrysalidd obtained yrom csterpollars reared in 1900, Mr. Royert Askin
bred tej moths ih 1901, eleven in 1902, two in 1903, xive in 1904, and two
in 1905.

The spesies is wmdely districutec over England, Wwles, and the south of
Scohland, bgt it is mlst frequent in the south of Enjkand. Not mucn hs
ktown of nt in Lreland, but it ras been noted from cjuntids Dublin, Mouth,
anv Derry.

HEATH RIVULET (_Perislma minorata_).

Vhe Britifh firm if this rpecies (Plate 83, Figs. 9, 12) is rather snaller
and darker tman tipjcal _minorata_, Txtitwchke, and as Strphdns hws fycured
and deswribdd ky as _dricetauc_, tmis namr should be adopted xor kur native
race.

The ehlte
(_Perizoma bifasciata_). Haworth described two forms of and specimen of is shown on represents (_bifaciata_, the Double-barred and Fig. 5 {209} _unifasciata_ (the Single-barred Rivulet). The difference appears to be that in the type (_bifasciata_) the "rivulets" are white distinct, thus bringing out a dark band between the central one and the of wing. stoutish is pale brown, inclining to ochreous on the back, along which are three lines, the central greyish, and the others whitish shaded with greyish; whitish stripe low down the sides; the usual dots black, the spiracles black, with (adapted from Fenn). September and October it feeds in the seed capsules of _Bartsia odontites_, and is often plentiful; Mr. F. Mathew nearly five from small of the food in the Harwich district. The moth July and August, but is not often seen the daytime, is not taken very frequently, even flying at night, but it comes to light, visits flowers. From chrysalids obtained from caterpillars reared in 1900, Mr. Robert Adkin bred ten 1901, eleven in 1902, in 1903, five 1904, two 1905. species is distributed over England, Wales, and the south of Scotland, but it most frequent in the south of England. Not much is it Ireland, but it been noted from counties Louth, Derry. HEATH RIVULET (_Perizoma British of 83, 9, is rather smaller and than typical _minorata_, Treitschke, and Stephens has figured and name should be adopted for our native race. white
 (_Perizoma bifasciata_).

Haworth Described tWo forMs oF thIs SpecIes, aNd a specimen of eACh is
Shown on our Plate 83. Fig. 4 reprEsentS _bIFascIAtA_ (_bifaCiata_, thE
doUBLe-bArReD RiVuLEt), And FiG. 5 dePicts {209} _unIfasciata_ (tHe
SInGle-barred RivULeT). The chief dIffErence appearS to Be that In The TYpe
(_biFasCiata_) The "rivULets" arE white and DiSTinct, tHUs bringING oUt a
dArk band between the CEnTRal one and the baSe of thE wINg.

tHE stOutIsh caterpiLlAr is pALe brown, INcLINIng TO ochreous on thE back,
along wHIch Are thrEe LinES, the ceNtral OnE GreYish, and the oTherS
whitish sHaded wITh greyiSH; a whitiSh striPe lOw dOwn aLOnG tHe sIdES; thE
UsUal DOts Are black, AnD tHe spiRaclES ARE blaCk, mArgiNed wiTh ochreous
(adaPteD froM fenN). In SePtembEr anD OCtobeR it feeDs in tHe Seed capsules
of _BArtsIa odontitEs_, aNd Is oFtEn pleNTiful; MR. G. F. matHew recoRds
obtaINinG nEARLy Five hundred from thrEe SMAlL bundles Of the fOOd PlANt
gatherEd In tHe HaRWIch diStriCT.

THe moth is Out in JULy AnD August, BuT is not OfTen SeeN in thE DaytIme,
and Is not takEn verY Frequently, even WHen flying at niGHt, BUT iT ComeS
to Light, and visIts fLOwerS.

FroM ChRysALids oBtainEd FRoM Caterpillars reared iN 1900, MR. RoberT AdkiN
bred ten moths In 1901, eleven in 1902, TWO In 1903, five in 1904, And tWO
iN 1905.

the species is wiDely dIstributed OVer EnglaNd, WalEs, and the South of
ScOTLand, but iT is MosT frEquENT iN the south of EnGLAnd. NOt Much is
kNowN of it in ireLanD, buT it HaS been noteD from couNtIeS DUbLin, louth,
ANd Derry.

HeAtH RiVuLEt (_PeriZOma minOrata_).

the BRiTiSH foRm of thiS SpECIes (PLaTe 83, figs. 9, 12) Is rAtHer smAlleR
And Darker tHan typicaL _miNOratA_, TReItschke, And as Stephens HaS figured
anD dEscRibed iT AS _ericetaTa_, this name should be adoptED for our NatIve
raCe.

ThE white
 (_Perizoma bifasciata_).
Haworth d escri bed  tw oform s of  this species, anda specimen of each isshown  o n  our Pl ate 8 3. Fig. 4r e pre se nt s _ bi f as ciata _ ( _bifaci ata_, theDou bl e-barred Riv u le t), and Fi g.5 depicts {2 09}  _unif as cia t a_ (t heSingl e-barr e d Rivu let). The  c h ief di f ference a pp ears  to be that in th e  t y pe
(_bifasciat a_) th e" ri v u let s"are whitean d dis t inct, t h us b r ing i ng out a
dark  band betwe e n t he cen tr alo ne and  theba s e o f the wing. 

Th e stoutis h cate r pillari s palebrown,  in cli ning to  o chr eo u s o n  t heb ack ,
alongwh ic h are  thr e e l ines , t he c entra l one greyish , a nd t h e o thers 
whit ishsh adedwith g reyis h;  a whitish stri pe l ow down a lon gthe  s ides; the
us ual  do ts areblack,a ndth e s pi racles are black,ma r g in ed withochreo u s(a d apted fr om  Fe nn). I n Sep temb e rand Octo ber it fe ed s in th eseed c ap sul esof _B a rtsi a odon tites_,and i s  often plentif u l; Mr. G. F.M at h e wr ecor dsobtaining n earl y  fiv e hu n dr edf rom t hreesm a ll bundles of the food  p lant
g ather ed in the Har wich distr i c t .

The m othi so ut in July and  Augu st, but is not ofte n see n in the  daytime, a nd is no t t ake n v ery f re quently, even w henfl ying at  ni ght, bu t i t c ome s
t olight, an d visits  f lo we rs .
Fromc hrysalid sobt ai ned  from caterp illar s re ar ed in1900, M r .R o bert  A dk in
b red  t en mo thsi n 1 901, el even in 1 902 ,  two  i n1903, f ive in 1904,an d two
in 1 90 5.
The s p e cies iswidely distributed over England , W ales,  and  the sout h o f
Scot lan d , butit ismostfr equ e n t int h esou th  of Englan d .  No t muc his
k nown of  it in Ireland, bu t  it  has been not edfrom c ou nti e sD ubl in ,  Lo u t h,
and Derry.
HEATH RIVU LE T  ( _Perizomam ino ra ta_).
The Bri tishf orm ofthis spec ies (Plat e83,F i gs.  9, 12) is  rathersmaller
a n d dar k er  than  ty pical_m ino rata_ , Trei t sch ke, a nd asSt ephens  hasfi gured
an d described it as _eric etata_ , thi s n ame shoul d b e  ad opted for  our  native
ra ce. 

T he wh ite 
 (_Perizoma_bifasciata_).

Haworth described_two forms of this_species, and_a_specimen of_each_is
shown on our_Plate 83. Fig._4 represents _bifasciata_ (_bifaciata_,_the
Double-barred Rivulet), and_Fig._5 depicts {209} _unifasciata_ (the
Single-barred Rivulet). The chief difference appears to be that in_the_type
(_bifasciata_) the_"rivulets"_are_white and distinct, thus bringing_out a
dark band between the_central one_and the base of the wing.

The stoutish caterpillar_is_pale brown, inclining_to ochreous on the back,
along which are three lines,_the central one greyish, and the_others
whitish shaded with_greyish;_a_whitish stripe low down_along the sides; the
usual dots are_black, and the spiracles are black,_margined with ochreous
(adapted from Fenn). In September_and October it feeds in the_seed capsules
of _Bartsia odontites_, and_is often_plentiful; Mr. G. F. Mathew_records
obtaining nearly five_hundred from_three small bundles_of the food plant
gathered in the_Harwich district.

The moth_is out in July and August,_but_is not often_seen_in_the daytime,
and_is not taken_very_frequently, even_when_flying at night, but it comes
to_light,_and visits flowers.

From chrysalids obtained from caterpillars_reared in 1900, Mr._Robert_Adkin
bred ten moths in_1901, eleven in 1902, two_in 1903, five in 1904, and_two
in 1905.

The_species is_widely distributed over England, Wales, and the south of
Scotland, but it_is most frequent in the south_of England. Not much_is
known of_it_in Ireland, but_it_has been_noted from counties Dublin, Louth,
and Derry.

HEATH RIVULET_(_Perizoma minorata_).

The_British form of this species (Plate_83, Figs. 9, 12)_is_rather smaller
and darker than typical _minorata_,_Treitschke, and as Stephens has figured
and_described it as _ericetata_, this_name_should_be adopted for our native
race.

The_white