1920] Luti and CockereU, Notes on American, Bees 581 



Viereck, 1906, p. 237. Oak Creek Canyon, Arizona; VII, VIII; (Snow). 

 A. u alamosana Cockerel!, 1906, p. 100. At Lycium. 

 Cockerell, 1906, pp. 68, 70, 100, 311. Fort Collins, Colorado; VI; on 

 yellow sweet clover; (S. A. Johnson). Nevada. "Upper Sonoran." 

 Cockerell, 19066, p. 277. N. Yakima, Washington; VI; (Jenne). 

 Cockerell, 1916, p. 283. Claremont, California; (Baker). 

 Cockerell, 19166, p. 55. Coronado Islands, Mexico; VIII. 

 Bray, 1917, p. 93. Claremont, California; IV; at cactus and poppy. 

 Cockerell, 1920, p. 113. Santa F6, New Mexico. 

 See Tetralonia acerba. 



ursina Cresson, 1869, p. 291. cf. West Virginia; (Ridings). 



Cresson, 1879, p. 227. North Carolina. 



Robertson, 1891o, pp. 580, 589. At Mertensia virginica and CoUinsia vema. 



Robertson, 1896, pp. 160, 162. Carlinville, Illinois; at ^sculus glabra 

 and Astragalus mexicanus. 



Podalirius ursinus Cockerell, 1897c, p. 22. Organ Mountains, and Vega 

 San Jos6, New Mexico. 



Robertson, 1898a, p. 242. At Lonicera sullivantii. 



Cockerell, 1914a, p. 281. Garrison, New York; (Cattell). 



usticauda Cockerell, 19126, p. 22. 9 . Antigua and Amatitlan, Guate- 

 mala; II; (W. P. Cockerell). Subgenus Micranthophora. 

 valLorum. See Anthophoroides. 

 versicolor. See Centris. 

 vierecki. See centriformis vierecki. 

 volucellseformis Dours, 1869, p. 189. 9 . Mexico. 

 walshii Cresson, 1869, p. 290. d'*, 9. Illinois; (Walsh). 



Robertson, 1898o, p. 230. (?) Carlinville, Illinois; h.\ Lespedeza reticulata 

 and, 1899, p. 36, at Cassia chamcecrista. 



Amegilla walshii Robertson, 1905, p. 372. 



Cockerell, 1906, pp. 65, 66, 70, 100. Fedor, Texas; (Birkman). At 

 Cassia. 



Graenicher, 1907, p. 26. 9 . Wisconsin; at AUium cernuum. 



Cockerell, 1909, p. 26. Malcolm, Nebraska; IX; &t Salvia. 



Graenicher, 1911, p. 248. Mouth of Yellow River, Burnett County, Wis- 

 consin; VII or VIII; at Rudbeckia hirta. 



See smithii. 



washingtoni Cockerell, Viereck et al., 1905, p. 313. 9 . Pasco, Wash- 

 ington; V; (Kincaid). 



Cockerell, 19066, p. 277. N. Yakima, Washington; V; (Jenne). 

 Cockerell, 1916, p. 283. Claremont, California; (Baker). 



watsonia. See porter ce watsoni. 

 wiUingi. See bomboides luillingi. 



