adult specimens were collected with bg sentinel ( biogents ag , regenssburg , germany ) and truck traps , preserved in 70% ethanol , and subsequently cleared , dissected , and mounted on microscope slides . the specimens were examined , measured , and illustrated with a binocular compound microscope with the aid of a camera lucida . photomicrographs were taken with an infinity digital camera ( lumenera corporation , ottawa , canada ) attached to an olympus microscope ( olympus corporation , tokyo , japan ) , later edited using adobe photoshop ( adobe systems , san jose , usa ) . definitions of the taxonomic characters follow haenni ( 1997 ) and amorim ( 2009 ) . all specimens are deposited in the collection of arthropods with medical importance ( caim ) , mexico city , distrito federal , mexico , and in florida state collection of arthropods ( fsca ) , florida . this article and the nomenclatural act it contains have been registered in zoobank ( www.zoobank.com ) , the official register of the international commission on zoological nomenclature . the lsid ( life science identifier ) number of the publication is urn : lsid : zoobank.org : pub : a4f8db2b-175f-4550-af75-ac73b9dc7327 genus parascatopse 
 cook , 1955 parascatopse 
 cook , 1955 : 362 . type species : parascatopse wirthi 
 cook , 1955 ( orig . des . ) . comments : this species was previously known only from california ( cook 1955 : 363 ) . the apparent shape of tergite and sternite 7 seem different from the drawings of cook ( 1955 ) , but this is probably due to an artifact of mounting the specimen . however , we consider our specimen consistent with the characteristics of the male genitalia . new record : florida , monroe co. , vaca key , 25 ii 2011 , l. hribar , coll . , ex : bg sentinel trap , 1 male ; same data except 9 xii 2009 , 1 female . ( fsca . ) genus psectrosciara 
 kieffer , 1911 psectrosciara kieffer , in 
 enderlein , 1911 : 192 ( also kieffer 1912 : 192 ) . type - species : psectrosciara mahensis 
 kieffer , 1912 ( orig . des . ) ( lsid : urn : lsid : zoobank.org : act : bc8915d1 - 1b5d-4c59-b52d-095f47a050fa ) ( figs . florida , monroe co. , lower sugarloaf key , 18 vi 2013 , c. pruszynski , coll . , ex : truck trap ( fsca ) . paratypes , 5  , same data as holotype , ( 3 in fsca , 2 in caim ) ; 1  same data except l. sugarloaf key , 19 vi 2012 , l. hribar and c. pruszynski , colls . , truck trap ; 1  same data except 19 v 2013 ; 1  same data , except 22 iv 2013 ( caim ) . diagnosis . this species belongs to the scatopsiformis group , it can be distinguished by the characters of the male genitalia , particularly the spoon - shaped ( fig . 8) , curved and apically rounded gonostylus ; and the flattened , spear - shaped epandrium . head : dark brown , longer than wide ; eyes large , holoptic , with short hairs between facets ; ommatidia with similar dimensions ; two lateral ocelli , equal in size ; small medial ocellus . antenna uniformly brown , shorter than head ( fig . 2 ) ; scape square ; pedicel subcylindrical ; flagellum with eight flagellomeres , flagellomeres i  vii wider than long , flagellomere viii elongated ; scattered setae on each flagellomere ; flagellomeres covered with microtrichia and sensilla , flagellum length , 0.7  mm ; frontoclypeus setose ; occiput pilose , with a pair of lateral sensilla ; small internal sclerite at base of labella ; palpus brown , elongated ( fig . 3 ) , as long as labella ( length 0.11  mm ) , setose , with two sensory pits , one apical and the other near the middle of the segment ; cardo - stipes setose ; labellum light brown . 
 fig . scale bar  =  0.04  mm ( right ) ; 0.1  mm ( left ) . scale bar  =  0.04  mm ( right ) ; 0.1  mm ( left ) . dark brown ; longer than wide , compressed laterally ; scutum rather sparsely covered with short setae ; pleura dark brown ; antepronotum and proepimeron setose ; anterior spiracular sclerite setose , longer than wide , small spiracle , located posterolaterally ; pleural sclerites setose ; posterior spiracular sclerite with six setae . coxae dark brown ; femora and tibiae similar in length ; fore femur dark brown , mid and hind femora brownish ; tibiae with subbasal pale brown rings ; fore femur strongly inflated ; fore tibia club - shaped ; apex of tibiae and tarsal segments with stout setae ; tarsomere i of all legs longer than the following segments ; tarsomere iv on all legs shorter than other segments ; claws pointed ; empodium well developed . 6 ) anterior veins brown , bearing dense rows of macrosetae ; c , r1 , and r4 + 5 with an irregularly arranged row of short setae dorsally ; sc short ; macrosetae present on all veins and on membrane , especially abundant on the posterior half of wing ; ratio wing length / section costal 1 , 2.43 ; wl / c2 , 3.06 ; wl / c3 , 3.16 ; c1+c2/wl , 0.73 ; cross - vein r - m short . wing length , 2.38  mm , width , 0.95  mm ; c extending 0.73 of wing length . 7a ) , longer than wide , with a rounded , undulated posterior emargination ; length , 0.20  mm , width , 0.18  mm ; sternite 7 ( fig . 7b ) slightly longer than wide , entirely divided into two lobes narrowly jointed at level of basal unsclerotized region , length , 0.32  mm , width , 0.30  mm . gonost , gonostyle ; ep , epandrium ; hy , hypandrium ; sve , seminal vesicle . gonost , gonostyle ; ep , epandrium ; hy , hypandrium ; sve , seminal vesicle . c ) , length , 0.7  mm , width , 0.30  mm ; epandrium setose , flattened , spear - shaped ; gonostyles spoon - shaped , setose , flattened , curved and apically rounded . head dark brown , longer than wide ; eyes large , with short hairs between facets ; ommatidia with similar dimensions ; two lateral ocelli , equal in size ; small median ocellus . antenna missing ; occiput pilose , with a pair of lateral sensilla ; palpus brown , elongated , of similar length as labella , setose , length 0.12  mm . thorax : dark brown , longer than wide , compressed laterally ; scutum rather sparsely covered with short setae ; pleura dark brown ; antepronotum and proepimeron setose ; anterior spiracular sclerite setose , longer than wide , small spiracle located posterolaterally ; pleural sclerites setose ; posterior spiracular sclerite with 4 setae . legs : as in previous description of male . wing : otherwise , as in male , anterior veins brown ; c , r1 and r4 + 5 with an irregularly arranged row of short setae dorsally ; sc short ; macrosetae present on all veins and on membrane , especially abundant on the posterior half of wing ; ratio wing length / section costal 1 , 2.58 ; wl / c2 , 2.93 ; wl / c3 , 3.52 ; c1+c2/wl , 0.72 ; cross - vein r - m short . wing length , 2.20  mm , width , 0.90  mm ; c extending 0.72 of wing length . dark brown ; intersegmental membrane of the sternites 3 and 4 with a median membranous lobe ( fig . 9a and b ) , subrectangular , setose , with posterior emargination , without slender finger - like appendages ; tergite 7 elongated , longer than wide , with paired posterior lobes ( fig . scale bar  =  0.5  mm ( a ) ; 0.1  mm ( b and c ) . scale bar  =  0.5  mm ( a ) ; 0.1  mm ( b and c ) . 10 ) : tergite 8 + 9 with anterior emargination u - shaped ; genital furca y - shaped ( fig . this new species is included in the scatopsiformis group as defined by cook ( 1958 ) and appears closely related to psectrosciara scatopsiformis enderlein , 1912 , psectrosciara californica ( cole , 1912 ) , psectrosciara brevipennis 
 cook , 1958 , and psectrosciara serrata 
 cook , 1958 . as already mentioned by cook ( 1958 ) and amorim ( 1982 ) , the homologies of male genitalia are very unclear and psectrosciara is probably one of the most difficult genera of the scatopsidae in this respect . floridensis may be distinguished from closed related species by its spear - shaped epandrium and spoon - shaped , curved and apically rounded gonostyli . however , other species of scatopsiformis group have development of the epandrium , namely psectrosciara dissita 
 amorim & haenni , 1992 ( palaearctic region ) and psectrosciara rossi 
 cook , 1958 ( neotropical region ) , whereas the remaining species recognized from the new world have very short and weakly sclerotized epandria ( amorim and haenni 1992 ) . an initial hypothesis of the relationships of the scatopsiformis group is proposed by amorim and haenni ( 1992 ) . the wing is very short ( 1.131.20  mm ) , not projecting beyond the apex of the abdomen and vein m1 is only present near wing margin ; the new species differs in these aspects . serrata by the lack of slender finger - like appendages articulating tergite 7 , whereas in ps . californica , a pair of processes is present posteriorly ; the posterior emargination of tergite 7 of ps .
psectrosciara floridensis sp . nov . belonging to the scatopsiformis group is described and illustrated . 
 this species is closely related to psectrosciara scatopsiformis enderlein , 1912 , psectrosciara californica ( cole , 1912 ) , psectrosciara brevipennis cook , 1958 , and psectrosciara serrata cook , 1958 . 
 a new record of parascatopse sonorensis cook is reported from the state of florida .