THE CANADIAN ENTOM0L0O18T. 195 



1 7. Abdomen fasciate or subfasciate 18. 



Abdomen not at all fasciate 24. 



18. Abdomen densely clothed with ochreous 



pubescence trac/ia?idre?wides. 



Abdomen not densely clothed with ochreous pubescence 19. 



1 9. Legs pale, wings yellow auricoma. 



Legs dark, wings not yellow, pale .20. 



20. Dorsulum shining sairra. 



Dorsulum dull 21. 



2 1 . Abdomen blue Seattlensh. 



Abdomen black 22. 



22. Pubescence bright fulvous Washingtoni. 



23. Large 10 mm.; fasciae rather distinct Macguillivrayi. 



Smaller 8 mm.; fascise rather indistinct Pullmani. 



24. Abdomen with some black pubescence 25. 



Abdomen with no black pubescence 26. 



25. Face and legs with black hair Carlini. 



Face and legs with pale hair saccata. 



26. Cheeks not twice as broad as the eye vidua. 



Cheeks twice as broad as the eye pulverulenta. 



Opandrena and Pterandrena. 

 Males. 

 Joint 3 longer than 4, shorter than 4 + 5. 



Abdomen more or less distinctly punctured i. 



Abdomen impunctate 4. 



1 . TibiK pale 2. 



Tibise dark 3. 



2. Abdomen shining; indistinctly fasciate; pubescence whitish .. A'/z/c-a/V///. 



pubescence fulvous. .Kincaidii var. 

 Abdomen dull, distinctly fasciate Vernoni. 



3. Abdomen rather indistinctly punctured; scutellum polished .. 7>'^t/i>r/>. 

 Abdomen distinctly punctured ; scutellum dull Cressoni. 



4. Dull ; distinctly fasciate nmstelicolor. 



Joint 3 longer than 4 + 5 ; abdomen shining subfasciate . . . .pallidifovea. 

 Atidrefia vibuniel/a, Graen. Can. Ent., XXXV., 1903, p. 165. 



$, 6th, 7th June, 1899, Corvallis, Or. (Cordley) ; $, 27th April, 

 1895, Almota, Wash. (C. V. Piper); 17th April, 1S96, Livingston, Vane; 

 Victoria. B. C. This may be the same as A. perj>iexa, Sm, 



