56 ANDRENID^. 



smooth, shining, and nigro-ameous. The face with pale fulvo- 

 ochraceous pubescence, that on the clypeus whitish. The thorax 

 with fulvo-ochraceous pubescence above, paler on the sides of the 

 metathorax ; that on the legs beneath, and also the floccus at the 

 base of the posterior tibiae beneath, nearly white ; the scopa on the 

 posterior tibiae, as well as the pubescence on the tarsi, pale fulvous ; 

 wings hyaline, clouded and iridescent on their apical margins, the 

 nervures rufo-testaceous. Abdomen impunctate ; the apical mar- 

 gins of the second and following segments slightly depressed ; the 

 pubescence at the apex fulvous. 



Hab. Vancouver's Island. Collected by Dr. Lyall. 



19. Andrena Candida. 



Female. Length 3| lines. — Nigro-aeneous ; abdomen smooth and 

 shining ; the apical margins of the second, third, and fourth seg- 

 ments with white interrupted pubescent fasciae. Head with a deep 

 longitudinal channel on each side of the face along the margin of 

 the eyes, lined with a fulvous pile ; the clypeus shining, punctured, 

 and truncate, with the lateral angles acute. Thorax with thin 

 hoary pubescence; the floccus on the posterior femora beneath 

 white ; the scopa on the tibiae pale fulvous above ; the apical joints 

 of the tarsi rufo-testaceous. Abdomen ovate, the apical fimbria 

 rufo -fuscous. 



Hab. Vancouver's Island. Collected by Dr. Lyall. 



20. Andrena auricoma. 



Male. Length 4| lines. — Black, the entire pubescence golden yel- 

 low. The face with long dense pubescence. The thorax very finely 

 and closely punctured above; the wings fulvo-hyaline, slightly 

 clouded at their apex, the nervures pale rufo-testaceous ; legsrufo- 

 piceous, the tarsi pale ferruginous. Abdomen lanceolate, all the 

 segments fringed with golden-coloured pubescence. 



Hab. Vancouver's Island. Captured by Dr. Lyall. 



21. Andrena arrogans. 



Female. Length 5| lines. — Black, the base of the abdomen more 

 or less red. The face and cheeks clothed with white pubes- 

 cence. Thorax clothed with white pubescence above, beneath it is 

 faintly tinged with yellow ; on the metathorax the pubescence is 

 long and dense ; wings pale fulvo-hyaline, the nervures obscure 

 fusco-ferrnginous, the tegulse rufo-piceous ; the scopa on the pos- 

 terior tibiae fulvous ; the pubescence on the anterior and inter- 

 mediate tarsi beneath, and that on the posterior pair entirely, bright 

 fulvous. Abdomen very finely punctured ; the three basal seg- 

 ments ferruginous, and with a transverse black macula at the base 



