﻿34 



New York State College of Forestry 



Plate I. 



a, Idiocerus suturalis Fitcli; b. Idiocerus suturalis — nymph; c, Idio- 

 cerxis amahilis Ball; d, Maa-opsis canadensis Van Duzee; e, Maeropsis 

 basalis — female; /, M. hasalis — female genitalia; g, M. basalis — 

 female; h, Onocopsis cognatus Van Duzee — female; i, Onocopsis 

 vaj'iabilis Fitcli — female; ;, O. variabilis — female genitalia; k, Ono- 

 copsis fitchi Van Duzee; I, 0. fitchi ■ — nymph last instar. 



Oncopsis minor (Fitcli). 



Apparently one of the common forms on yellow birch but not 

 easily separated from fitchi. Barber 'r^oint, July 9, 10, 13 and 

 Aug. 2, 1920. 



Oncopsis nigrinasi (Fitch). 



State Forest Camp, Barber Point, July 5, 1920. 



