34 



Neiv York State College of Forestry 



Plate I. 



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

 cerus amabilis Ball; d, Ma-ci'opsis canadensis Van Duzee; e, Macropsis 

 basalis — female; /, M. basaiis — female genitalia; g, M. basalts — 

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

 variabilis Fitch — female; ;, 0. variabilis — female genitalia; k, Ono- 

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



Oncopsis minor (Fitch). 



Apparently one of the common forms on j-eUow hirch bnt not 

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

 Aug! 2, 1920. 



Oncopsis nigrinasi (Fitch). 



State Forest Camp, Barber Point, July f), 1920. 



