THE CA.NADIAN ENTOMOLOGIST. 189 



SYNOPSIS OF BEFS OF OREGON. WASHINGTON, BRITISH 

 COLUMBIA AND VANCOUVER —III. 



BV H. L. VIERECK, ASSISTED BY T. D. A. COCKERELL, E. S. G. TITUS, 

 J. C. CRAWFORD, JR., AND M. H. SWENK. 



Andrena, Fabr., and Opandrena, Robt. 

 Females. 



Third joint of antennae equal to 4 + 5, or very nearly 1. 



Third joint of antenna longer than 4 + 5 4. 



1. Scopa ample, compact, ihe hairs long and curved up 2. 



Scopa with the hairs short and straight 3. 



2. Abdomen punctured ; dorsulum closely indistinctly punctured, not 



metallic ; enclosure very finely rugulose, almost 



smooth viburnella. 



Abdomen not punctured. 



Without distinct narrow fasciae. 



Fovea about as broad as one-half the distance between lateral 

 ocellus and eye margin. 

 Enclosure granular, very nearly rugulose ; abdomen 



black melanochroa. 



Enclosure very finely granulated, abdomen 



greenish chlorogaster. 



With distinct narrow fasciae. 



Dorsulum impunctate or with indistinct punctures ; abdomen 

 black ; dorsulum dull. 

 Second abdominal segment with a broad whitish testaceous 



margin at apex Illinoieiisis. 



Abdominal segments not broadly testaceous ; green or 

 greenish or blue. 



Enclosure nearly smooth ; abdomen greenish Plperi. 



Enclosure rugulose ; abdomen distinctly green . .chlorifiel/a. 

 Abdomen distinctly blue ca?idida. 



3. Metatarsus of posterior legs one-half as wide as the tibiae at apex ; 



enclosure smooth ; abdomen indistinctly fasciate. .aiigiistitarsata. 

 Metatarsus of posterior legs more than one-half as wide as the tibiae 

 at apex. 



Abdomen fasciate; clypeus indistinctly punctured, dull. 



Enclosure smooth; pubescence abundant on the clypeus ; pubes- 

 cence of dorsulum gray ... mtis^elicolor. 



Enclosure smooth; pubescence sparse on the clypeus, . .siibti/is 



