No. 22.] HYMENOPTERA OF CONNECTICUT. 725 



21. Fore coxae without spines; a spot on each side of second 

 and third dorsal abdominal segments 22 



Fore cox;e with a short spine; pygidium subacute; yellow 

 fascia on fifth dorsal abdominal segment opaque, .denticulata 



22. Length less than 8 mm sayi 



Length 10 mm bisignata 



23. First transverse cubitus usually present 24 



First transverse cubitus usually wanting; largely red; second 



to fifth dorsal abdominal segments with yellow fasciae, 

 sometimes interrupted on second obliterata 



24. Mesonotum black; second to fifth dorsal abdominal segments 



with more or less interrupted yellow bands; scutel mostly, 



propodeum partly, yellow festiva 



Mesonotum with four yellow lines; first to sixth dorsal ab- 

 dominal segments with yellow bands; propodeum with 

 subquadrate marks encroaching upon the enclosure . . . .luteola 



25. Seventh dorsal abdominal segment entire 26 



Seventh dorsal abdominal segment notched; third antennal 



joint shorter than fourth 29 



26. Third antennal joint longer than fourth ?] 



Third antennal joint shorter than fourth; basal vein inserted 



a little before nervulus; abdomen black, with yellow 

 marks; mostly black proxima 



27. Propodeum with two yellow spots; posterior orbits largely 

 yellow 2 



Propodeum and posterior orbits black or nearly so; fifth and 

 sixth dorsal abdominal segments with continuous, second 

 to fourth with interrupted yellow bands; first dorsal ab- 

 dominal segment entirely black; basal vein usually inter- 

 stitial with nervulus placida 



28. Scape obovate; basal vein interstitial with nervulus; flagel 

 darker in the middle; scutel sub-bilobed vincta 



Scape ordinary; basal vein inserted before nervulus; flagel 

 darker above; scutel bilobed affabihs 



29. First transverse cubitus usually present 3 



First transverse cubitus usually wanting .obliterata 



30. First to sixth dorsal abdominal segments without entire and 

 continuous bands, usually with some lateral spots; when 

 continuous the bands have separated spots on extreme 

 sides of fifth segment 3I 



First to sixth dorsal abdominal segments with entire and 

 continuous -bands, sometimes narrowly interrupted on 

 first; basal vein inserted before nervulus; a band on first 

 dorsal abdominal segment continuous; flagel usually dark, 

 piceous beneath, joints cylindrical luteola 



31. Abdomen mainly black *.".'", ""!.',." f_ 





Abdomen chiefly reddish; basal vein inserted before nervulus 32 



