272 THE CANADIAN ENTOMOLOGIST 



and first discoidal about half the length of first transverse 

 cubital nervure, pollen brush white, mandibles 3-dentate. 



Alcidamea, 2052, simplex Cr. ( =prodncta Cr.). 



Throughout settled part of Canada. 



17. Eyes not hairy, 9 with pollen brush, cf has on dorsal segment 

 6 a high transverse ridge, or crest, which forms ihe apex of 

 abdomen, mandibles in d^ with a large tooth 



beneath Met^achile, Lat. 



Eyes hairy, 9 without pollen brush, tip of abdomen of cf 



spinose, of 9 acuminate Ctelioxys, Lat. 



Note. — The author submitted the above paper to Prof. 



T. D. A. Cockerell, who made some suggestions, mcst of which 



have been adopted. 



SOME BEES IN THE BRITISH MUSEUM. 



BY T. D. A. COCKERELL, HOULDER, COLOR.\DO. 



Andrena (Opandrena) ricardonis sp. n. 



cf. — Length U mm; black, the clypeus lemon yellow with 

 two black spots; hair of face, front and thoracic dorsum long and 

 fulvous, of cheeks and underside of thorax pallid but not white; 

 head broader than thorax; cheeks very broad, shining, obtusely 

 subangulate below level of middle c^f e\e; malar space almost 

 obsolete; mandibles long, but not so much produced at end as in 

 A. flavoclypeata; yellow clypeus higher in proportion to its width 

 than in ^ai'or/y/><'a/a. the yellow not approaching eyes at sides; front 

 dull, sides of vertex shining; antennic long, third joint longer than 

 fourth, but not nearly as long as four and five combined; flageilum 

 light fulvous beneath; disc of mesothorax and scutellum shining, 

 with \'ery sparse and minute punctures; area of metathorax small, 

 triangular, rugose, the apical part smoother but not polished; 

 tegulae dark reddish; wings greyish, stigma rather small, dull 

 amber, nervures dusky testaceous; b. n. meeting t. m.; second s. m. 

 narrow, receiving first r. n. near its end; first t. c. not near stigma; 

 legs slender, with hind margin of hind tibia*, and all the tarsi, 

 ferruginous; abdomen shining, with only \ery indistinct piliferous 

 punctures, hind margins of second and following segments with 



August. 191(i 



