1920] Lutz and Cockerell, Notes on American Bees 531 



B. rufocinctus castoris Cockerell, 1915, p. 537. cT. Beaver Creek, Mon- 

 tana; 6300 ft.; VIII; (Hunter). Franklin's, 1913, "Variety 6." 



B. rufocinctus phacelice Cockerell, 1919d, p. 358. Minnehaha, Pikes Peak, 

 Colorado; (Frances Lorg.) 



Doubtless the several varieties should be recognized; some of them 

 may even be distinct species. 



rufosuffusus. See huntii. 



sandersoni. See vagans sandersoni. 



schmiedeknechti . See terrestris moderatus. 



schneideri. See ephippiatus. 



scutellaris. Seefraternus. 



[.] separatus Cresson, 1863, p. 165. 9*, 9. Pennsylvania. Rock 



Island, Illinois; (Walsh). Canada; (Saunders). B. virginicua, 



(f , p. 87. 



Cresson, 1864, p. 41. Northern New York; (Ashton). 



Putnam, 1864, p. 101, and Packard, 1864, p. 114. Bridport, Vermont. 

 Boston, Massachusetts. Nest. 



Putnam, 1876, p. 195, and Cresson, 1876, p 210. Davenport, Iowa. 

 Spring Lake, Utah. 



Bowles, 1880, p. 33. Montreal, Canada. 



Handlirsch, 1888, p. 229 (part). Georgia (?). 



B. virginicus Provancher, 1888, p. 339. d'. Quebec, Can.u>a. 



Robertson, 1891o, pp. 569-596. Carlinville, Illinois; at Asclepias verticil- 

 latn, incamata, comuti, stdlivanti, and purpurescens, Acerates longifolia, 

 Hydrophyllum appendicidatum, Mertensia virginica, Ipomaea pandurata, 

 CoUinsia verna, Gerardia pedicularis and tenuifolia. 



Robertson, 1894, pp. 436-475. Macoupin County, Illinois; at Prunus 

 serotina, Rosa humilis, Pyrus coronaris, Crataegus crusgalli, Veronia fascicu- 

 lata (printed noveboracensis but charged by author in copies he sent out), 

 Ladjiaria Y^Liatris'^] pycnostachya, Solidago canadensis and lanceolata, Aster 

 novae-anglicE, Silphium laciniatum, Echinacea purpurea, Rudbeckia triloba, 

 Heliantkus grosseserratus, strumosus, and tuberosiis. Coreopsis aristosa, 

 Helenium autumnale and Cnicus altissimus discolor and laticeolatus. 



Robertson, 1895a, pp. 142, 143. 9, S. At Frasera carolinensis and Phlox 

 pilosa. 



Robertson, 1896, pp. 156, 160, 175, 178. At Podophyllum peltatum, ^sculus, 

 Astragalus canadensis, Aster ericoides vUlosus, and Rudbeckia laciniaia. 



Robertson, 1898a, pp. 233, 236, 244. At Comusflorida, Viburnum pubescens 

 and Helianthus divaricatus. 



Cockerell, 1899c, p. 3. Baldwin, Douglas County, Kan8.\s; (Bridwell). 



Harri.s and Kucks, 1902, p. 36. I^ke View, Kansas; at Cassia chanuecrista. 



Titus, 1902, p. 39. Fort Collins (Stannard) and Henderson (Gillette), 

 Colorado; VI-VIII. 



Viereck, 1903n, p. 119. Booiisboro and Chestertown, M.kryland; VIII; 

 (Vanatta). 



Bombias separatus.TiobeTtson, 1903, pp. 176, 177. 



