19201 LuU and CockereU, Noten on American Bees 597 



M. aurigenia Cockerel!, 19146, p. 409. Goodview, Colorado; VII; at 

 Helianlhus annuus coronatus. 



M. aurigenia Cockerel!, 19156, p. 482, and 19166, p. 77. Orange. Califobnia; 

 VIII; at HeUanthiis leniicularis. 



agilis semiagilis. See semiagilis. 

 agilis snouni. See snowii. 



agilis subagilis Cockerel!, 1905rf, p. 145. cf . Fort Collins, Colorado; 

 VIII; at Grmdelia squarrosa; (Bishopp). 



Cockerel!, 1906, pp. 76, 92, 102. Oak Creek Canyon, Arizona; (Snow). 

 Cockerel!, 1906c, p. 367. Fedor, Lee County, Texas; (Birlunan). 



albata. See Xenoglossodes. 



albilobris. See Thygater. 



albocincta Cockerell, 1919a, p. 119. 9. Mexico; (Baker). "This 



may be referable to Xenoglossodes." 

 albocoUaris Cockerell, 19196, p. 30. Mexico; (Baker), 

 ambigua Smith, 1879, p. 116. 9 . Mexico. 

 americana Lepeletier, 1841, p. 92. (Macrocera) cf . Carolina. 

 Smith, 1854, p. 312. 



Robertson, 1898, p. 53. Says tliat dentiventris Robertson, 1897, p. 353, is 

 this species. 1898a, p. 244: (?) Carlinville, Illinois; at Helianlhus divari- 

 catus. 



apacha. See Diadasia diminuta. 



apicata Lovell and Cockerell, 1906, p. 111. 9. Waldoboro, Maine; 



VII; at Pontederia cordata. 

 aachenborniana. See tepaneco aschenbomiatia. 

 assimilis. See Xenoglossa. 

 asteris Robertson, 1914, pp. 70, 373. 9. Carhnville, Illinois; at 



Asteroideae. 

 atrata Smith, 1879, p. 115. cf . Oaxaca, Mexico. 



Eucera atratula Dalla Torre, 1896, p. 225. 



Cockerell, 1896, p. 290. Paso de Telaya, Vera Cruz, Mexico; IV; 

 (Townsend). 

 Cockerell, 18996, p. 13. Oaxaca and lower part of Rio Nautla, Mexico. 



atratida. See atrata. 



atrifera Cockerell, 1910, p. 256. cf. Mexico; (Deppe). 



atrifera sandiarum Cockerell, 1910, p. 257. cf . Sandia Mountains 



New Mexico; VII; at Croton; (Watson). 

 atrifrons See carolinensis. 

 atripes Cresson, 1872, p. 275. 9 . Texas; (Belfra^^e). 



Robertson, 1898, p. 54. Carlinville, Illinois. 1914, p. 73 1^ at Cassiii 

 chanuecrista . 



