No. 22.] HYMENOPTERA OF CONNECTICUT. 187 



20. Tegulae stramineous 21 



Tegulae brownish or blackish, hind femora mostly stramine- 

 ous; sculpture of third dorsal abdominal segment not con- 

 fined to middle third at base cyaniridis 



21. Hind coxae mostly black or blackish; second dorsal abdom- 



inal segment broadly blackish at base scitulus 



Hind coxae mostly stramineous; second dorsal abdominal seg- 

 ment stramineous from base to apex, at least laterally 



parorgyiae 



22. Tegulae stramineous 23 



Tegulae brownish or blackish, hind coxae mostly black; scape 



black or blackish 24 



23. Antennae yellowish throughout flavicomis 



Antennae mostly black or blackish, at least above; hind coxae 



mostly stramineous rileyanus 



24. Second dorsal abdominal plate not depressed along apical 



margin 25 



Second dorsal abdominal plate depressed along apical mar- 

 gin hs^phantnae 



25. Sculpture of third dorsal abdominal segment not confined to 



basal half 26 



Sculpture of third dorsal abdominal segment confined to basal 

 half, and not extending to the end of that half; hypopyg- 

 ium shorter than pygidium; mid and hind femora mostly 

 black limenitidis var. 



26. Flagel dark brown, black or blackish 27 



Flagel mostly pale, yellowish toward tip xylinus 



27. Abdomen longer than thorax oxyacanthoidis 



Abdomen shorter than thorax delicatus 



28. Tegulae stramineous 29 



Tegulae brownish or blackish or black 34 



29. Hind coxae mostly black or blackish 30 



Hind coxae mostly stramineous or reddish rufocoxalis 



30. Second dorsal abdominal plate without a median longitudinal 



welt 31 



Second dorsal abdominal plate with a median longitudinal 

 welt 32 



31. Third, fourth and fifth dorsal abdominal segments black; hind 



coxae black at apex; scape pale augustus 



Third, fourth and fifth dorsal abdominal segments more or 

 less stramineous; hind coxae stramineous or yellowish at 

 apex crambi 



32. Second dorsal abdominal plate mostly or at least partly 



polished 33 



Second dorsal abdominal plate sculptured throughout; hind 

 coxae stramineous at apex; scape blackish hesperidivonis 



