1920] Lutz and Cockerell, Notes on Atnerican Bees 587 



nigrifrons Cresson, 1878fl, p. 195. (Melissodes) 9. California; 

 (Crotch). 



Diadasia nerea Fowler, 1899, p. 285. 9, &.. Tulare, Caufornia; V; 

 (H. O. Woodworth). 



D. nerea Cockerell, 1905, pp. 14, 105. Los Angeles and Banning, Cau- 

 fornia. 



Cockerell, 1906, p. 101. Gives synonomy. 



nitidifrons Cockerell, 1905, p. 104. cf. Banning, Californxa.. (David- 

 son). 



Cockerell, 19096, p. 206. N. Yakima, Washington; VI; (Jenne). 



See skinneri. 



opuntice. See australis opuntice. 



perafflicta. See afflicta perafflicta. 



piercei Cockerell, 1911, p. 132. cT*, 9. Corpus Christi*, Texas; 



III; at Opuntia; (W. D. Pierce). Beeville, Texas; IV; at Opun- 



tia; (Marlatt). " A species of the Lower Austral Zone." 

 rinconis. See australis rinconis. 

 skinneri Cockerell, 19096, p. 206. cT. N. n. for nitidifrons CockereW, 



1906, p. 73. Silver Lake, Wasatch Mountains, Utah; 8600 ft.; 



All; (Skinner). 

 sphesralceaxuni Cockerell, 19056, p. 744. cf . Between Las Cruces and 



Mesilla Park, New Mexico; VIII; at Sphceralcea fendleri lobata. 

 sumichrasti Cresson, 1878a, p. 218. (Melissodes). 9*, cf. Mexico; 



(Sumichrast). 



CockereU, 1904o, p. 22. 



See PtUothrix and Cockerell, 19176, p. 304. 



ioluca. See Leptergatis. 

 tricincta. See afflicta. 

 ursina. See enavata. 



Diadasiella Ashmead 

 See Exomalopsis. 



Dipedia 

 See Leptergatis. 



Emphob Patton, 1879, p. 476 



(Type: Melissodes bombiformis Cresson) 



Dalla Torre, 1896, p. 221, made Emphor a subgenus of Eucera. 



bombiformis Cresson, 1878, p. 219. (Melissodes) 9*, cf. Kansas.* 



Georgia. Virginia. 



See Melissodes nigripes Smith, 1854, p. 311. 9 (not c?), according to 

 Robertson, 1900, p. 53. 



