712 • CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



25. Process of labrum truncate, or semicircular, or, when seen 



from below, subemarginate 26 



Process of labrum finger-shaped; anal fimbriae from pale 

 brown to blackish in color, usually the latter piacida 



26. Enclosure of metanotum granular 27 



Enclosure smooth , ^o 



27. Clypeus with a narrow but distinct median impunctate space 28 

 Clypeus with a rather circular impunctate area, which is 



usually highly polished and conspicuous; abdomen sub- 

 fasciate miserabilis flavoclypeata 



28. Clypeus closely punctate 29 



Clypeus very sparsely punctate robcrtsoni 



29. Pubescence ochreous to brownish ochreous; abdomen dull, 



not distinctly punctate; clypeus somewhat flattened; hind 



tibiae blackish arabis 



Pubescence as in arabis; hind tibiae yellowish; abdomen distinctly 

 punctate winkleyi 



30. Wings without dark tips 31 



Wings distinctly clouded at tip; clypeus abundantly and dis- 

 tinctly punctate nubecula 



31. Dorsulum dull; clypeus dull and smooth distans 



Dorsulum shining; abdomen dull . , canadensis 



32. Process of labrum quadrate or nearly so, and margined, .fragilis 

 Process of labrum rounded, not margined Integra 



33. Face immaculate 59 



Face maculated, process of labrum not emarginate, or hardly 



so; clypeus sparsely punctate accepta 



34. Abdomen not distinctly punctate 35 



Abdomen distinctly punctate* t. e., almost umbilicately 



punctate 41 



35. Abdomen appearing bare, without abundant erect hairs; ab- 



domen and scopa with pale pubescence; wings pale 



brownish 36 



Abdomen not appearing bare, with abundant erect hairs.... 38 

 S6. Abdomen fasciate; clypeus distinctly punctate and shining.. 37 

 Abdomen subfasciate; clypeus indistinctly punctate, dullish 



ziziae 



3y. Anal fimbriae ochreous bisalicis 



Anal fimbriae dark brown novaeangliae 



38. Abdomen and scopa with pale pubescence .t 39 



Abdomen above and scopa with dark pubescence, abdominal 



pubescence mostly black; clypeus with a median impunc- 

 tate space milwaukeensis 



39. Abdomen without distinct bands of nearly erect pubescence; 



face without black pubescence; abdomen fasciate, shining; 



clypeus with a median impunctate space thaspii 



Abdomen with distinct bands of nearly erect pubescence 40 



