THE CANADIAN ENTOMOLOGIST. 297 



SYNOPSIS OF BEES OF OREGON, WASHINGTON, BRITISH 

 COLUiMBIA AND VANCOUVER.— V. 



RV HENRY L. VIERECK, ASSISTED BY T. D. A. COCKERELL, E. S. G. TITUS, 



J. C. CRAWFORD AND INI. H. SWENK. 



This portion of the synopsis was kindly prepared by Mr. J. C. 

 Crawford, and is based on material, in the main, from Dr. Cordley, of 

 Corvallis, Oregon • Prof. Harvey, of Victoria, British Columbia, and Mr. 

 Venables, of Vernon, B. C. A species from Montana is also described. 



Halictidce^ Halictus, Latr. 



BY J. C. CRAWFORD, DALLAS, TEXAS. 



Females. 



1 . Having no green 2 



Having more or less green 17 



2. Cheeks armed ligatus, Say. 



Cheeks not armed 3 



3. Tegulse large, punctured all over 4 



Tegul^e normal in size ; not punctured all over . . . : 5 



4. Mesothorax closely, coarsely punctured ■; metathorax coarsely 



rugose . . Kincaidii, Ckll 



Mesothorax finely, sparsely punctured ; metathorax finely 



rugose Vachali, n. sp 



5. Species having well-marked hair bands on the apical margins of 



abdominal segments 6 



Species without such hair bands 7 



6. Larger, 10-14 mrn., bands very broad, cream-coloured ./^r/;/^5//j', Sm 

 Smaller, about 10 mm. or less, bands narrow, white. . . Lerouxii, Lep 



7. Truncation of metathorax entirely surrounded by a salient rim. . . .8 

 Salient rim of metathoracic truncation lacking at least above 15 



8. Base of metathorax with coarse, deep rugae 9 



Base of metathorax with fine stride 12 



9. Striae of base of metathorax regular parallel, ist abdominal segmen 



distinctly punctured 10 



Striae irregular . . . , 11 



10. A band on middle of ist segment, bands on bases of segments 2-4, 



complete sisymbrii, Ckll. 



No band on segment i ; bands on 2-4 narrowed or interrupted 



medially Olympice, Ckll 



September, 1906 



