No. 22.] HYMENOPTERA OF CONNECTICUT. 7U 



Most of the hairs of outer surface of hind tibise branched; 

 species resembling arabis and allies 47 



13. Apex of hind tibise not twice as wide as metatarsus 14 



Apex of hind tibia; twice as wide as metatarsus; enclosure 



of propodeum conspicuously granular nasoni 



14. Species with three closed submarginal cells 34 



Species with two closed submarginal cells; process of labrum 



forming an obtuse-angled triangle; abdomen black 



andrenoides wellesleyana 



15. Abdomen with second dorsal segment impressed less than 



three-fourths distance from base to apex 16 



Abdomen with second dorsal segment impressed three- 

 fourths or more than three-fourths distance from base 

 to apex; first joint of flagel shorter than second and third 

 joints combined 17 



16. Shining space between facial fovea and eye margin abruptly 



separated from fovea 51 



Shining space between facial fovea and eye margin not 

 abruptly separated from fovea; process of labrum broadly 

 truncate; clypeus with no distinct median impunctate 

 space; second dorsal abdominal segment impressed practi- 

 cally one-half distance from base to apex rehni 



17. Shining foveal space as wide, or not as wide, as fovea below 55 

 Shining foveal space wider than fovea below; dorsulum with 



its punctures adjoining or nearly so 57 



18. Abdomen not satiny 19 



Abdomen satiny 21 



19. Abdomen above without erect yellowish pubescence 20 



Abdomen above with erect yellowish pubescence hirticincta 



20. Abdomen black; anal fimbriae fuscous novaeangliae 



Abdomen greenish salictaria 



21. Abdomen without conspicuous satiny patches 22 



Abdomen with conspicuous satiny patches; process of 



labrum rounded; abdomen with its tegument partly red- 

 dish, first dorsal segment being black at base and apex.. 



brunniventris rhodura 



22. Length 11 mm.; process of labrum rather rounded; hind legs 



with their tegument dark or black; pubescence on dorsum 

 of thorax ochreous to reddish; scopa of hind tibiae light 



in color 2 3 



Length 7-8 mm.; process of labrum finger-shaped in outline; 

 pubescence pale, i. e., whitish to ochreous; anal fimbriae 

 chocolate-brown or of an allied shade placida 



23. Abdomen sericeous ^4 



Abdomen apparently bare, anal fimbriae hrown nivalis 



24. Anal fimbriae brown perplexa viburnella 



Anal fimbriae golden dunningi 



