16 GENERA OF IIYMENOITERA. 



Antenna? longer than to base of abdomen, setaceous; lanceolate (••■II with 

 short straight cross-ncrvure, or subt-ontrdctefl in the middle. 



FHelij-protaNiM Htutig. 

 12. — Antenna short, more or less thickened towards tip. 



Eyes reaching almost to Iwse of maiiciililes: labriim rounded at ajiex. 



AIlaiitiiN .Tur. 

 Eyes remote from base of mandibles; labrum emarginatc at apex. 

 -^ Kciaptery.v .Steph. 



AnteiuiK' long, setaceous 13. 



IX — I.ia«iceolate cell open or with oblique cross-nervure. 



Posterior wings with two middle cells; head not unusually extended 



behind the eyes Ta.xoiius Hartig. 



Fo.sterior wings with two middle cells or none; head usually dilated be- 

 hind the eyes (StroiiKyloKaNler Dahlb. 



Posterior wings witii only (me middle cell PoPOilostoina Dublb. 



Lanceolate cell with straight cross-nervure. 



Third joint of anteiime much longer than fourth Toiitlircdo Linn. 



Third and fourth joints of antenna' sube({nal...Teiilhre«lo|»si!>» Costa. 

 Liinceolate cell contracted in the middle ^iyiiairenia Hartig. 



Subfamily Lydiin.e. ' ' 



One marginal cell ; antennse % pectinate. 9 serrate. 



Lanceolate cell with straight or oblique cross-line IjOphyriiM Liitr. 



liinceolate cell without cross-line, contracted in middle.. .^IoilO<*teilU!« Dahlb. 

 Two marginal cells; antennee long, setaceous in both sexes I^yda* Fab. 



Subfamily XvELiiXi^f:. 



Fourth and following joints of antennte short, together not longer than the 

 scape .^larro.icyela Kirby. 



Fourth and following joints of antennte long, slender, thread-like, together 

 nearly as long as joints 1-3 combined Xyela Dalm. 



Mr. Peter Cameron, in his elaborate Monograph of the Briti.-'h 

 Phytophagous Hymeno})tera," (of which two volumes have been j)ub- 

 lished, 1882-1884) suggests an arrangement so different from that 

 given above, that it has been thought well U) reproduce it here, as far 

 as it goes, as a possible aid to the student who has not access to that 

 valiuible work. 



In the first place, he divides what he terms the "Phytophagous 

 Hymenoptera (variously called Phytiphaga in allusion to their habits, 



* This name will have to give place to Pamphilius Latr., which was described 

 in 1802, and therefore has priority. 





