▁with ▁a ▁distinct ▁point . ▁They ▁can ▁be ▁found ▁from ▁September ▁to ▁November ▁and ▁when ▁m ature ▁drop ▁to ▁the ▁ground . ▁ ▁Similar ▁species ▁ ▁At ▁the ▁tip ▁of ▁a ▁tw ig ▁the ▁sw elling ▁of ▁And ric us ▁curv ator ▁has ▁an ▁interior ▁cav ity ▁that ▁is ▁spher ial ▁or ▁o val , ▁compared ▁with ▁the ▁sexual ▁gall ▁of ▁A ▁infl ator ▁where ▁the ▁interior ▁is ▁long ▁and ▁narrow ▁ ▁And ric us ▁qu erc us ram uli ▁is ▁egg - sh aped , ▁smaller ▁than ▁the ▁a sex ual ▁gall ▁of ▁ ▁A . ▁infl ator , ▁up ▁to ▁ 3 . 5   mm ▁long ▁and ▁also ▁m atures ▁in ▁the ▁aut umn . ▁ ▁And ric us ▁inf ector ius ▁a sex ual ▁gall ▁is ▁similar ▁with ▁a ▁ 1 0 – 2 0   mm ▁sw elling ▁when ▁m ature ▁in ▁October , ▁falling ▁from ▁the ▁tree ▁during ▁the ▁winter . ▁The ▁colour ▁var ies ▁from ▁green ▁to ▁dark ▁brown ▁as ▁it ▁m atures . ▁ ▁Distribution ▁The ▁was p ▁is ▁found ▁in ▁Europe ▁from ▁Ireland ▁to ▁the ▁Ukraine . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Category : C yn ip idae ▁Category : G all - ind uc ing ▁insect s ▁Category : H ymen optera ▁of ▁Europe ▁Category : In sect s ▁described ▁in ▁ 1 8 4 0 ▁Category : O ak ▁g alls ▁Category : T ax a ▁named ▁by ▁The odor ▁Hart ig <0x0A> </s> ▁C ▁C ▁Land ▁Hold ings ▁Limited ▁()