■so. 1932. EUCERINE BEES OF NORTH AMERICA— COCKERELL. 271 



*iiiysops CocKERELL, 1905. Maybell, Colorado. Tab. 1, 2. 

 Visits thistle flowers. 



Variation; Entomologist, December, 1907, p. 269. Also at North Yakima, Wash- 

 ington, July 27, 1903 (Eldred Jenne). A male from North Yakima, August 22, 

 1903 (E. Jenne) is placed as a A-ariety of M. mysops, but it has the apical part of 

 flagellum bright ferruginous beneath. It is unfortunately in bad condition; 

 possibly it is the undescribed male of M. desponsiformis. 

 *nevadensis Cresson, 1879. Nevada (Morrison). Tab. 1. 

 nigra Lepeletier, 1841. Pennsylvania. "^ 



Same as bimaculata. 

 nigripes Smith, 1854. "United States." 



Smith's male is M. cnici. 

 nigroaenea Smith, 1854. Brazil. 



Bertoni and Schrottky (1910) state that they received it from Texas, labelled 

 M. menuacha. A female nigroaenea received from Schrottky has the facial quad- 

 rangle broader and shorter than in menuacha. It is from San Juan, Argentina. 



* nigrosignata Cockerell, 1905. Oak Creek Cafion, Arizona (Snow). Tab. 1. 

 nigrosignata pallidisignata Cockerell, 1905. Oak Creek Cafion, Arizona (Snow). 



Tab. 1. 

 nivea Robertson, 1895. Illinois (Robertson). Tab. 4. 



Falls Church, Virginia, September (N. Banks), 

 oajacena Dalla Torre, 1896. 



Same as hirsuta. 



* obliqua Say, 1837. Indiana. Tab. 1, 4. 



*opuntiella Cockerell, 1911. Brownsville, Texas (Jones and Pratt). 



Type.— Cat. No. 14105, U.S.N.M. 

 otomita Cresson, 1878. Mexico (Sumichmst). Tab. 1. 

 pallida Robertson, 1895. Illinois (Robertson). Tab. 4. 



* pallidicincta Cockerell, 1896. Gila River, New Mexico (C. H. T. Townsend). 



Tab. 1. 

 Paratype.—Ga,t. No. 3357, U.S.N.M. 

 paroselse Cockerell, 1905. Mesilla, New Mexico (Cockerell). Tab. 1. 



Visits Parosela scoparia. 

 pecosella Cockerell, 1905. Pecos, New Mexico (W. P. Cockerell). Tab. 1. 

 pecosella verbesinarum Cockerell, 1905. Las Cruces, New Mexico (Cockerell). 

 Tab. 1. 

 Identical %vith X enoglossodes excurrens. 



* pennsylvanica Lepeletier, 1841. Pennsylvania. Tab. 1. 



pernigra Cockerell, 1896. San Rafael, Vera Cruz, Mexico (C. H. T. Townsend). 

 Resembles M. atrata and bimaculata. Visits Ipomoea. Male clypeus dark. 



* perplexa Cresson, 1878. "Georgia (Morrison); Texas (Belfrage)." Tab. 1, 2. 

 Falls Church and Glencarlyn, Virginia, July to September (N. Banks). 



* personatella Cockerell, 1901. La JoUa, California (Cockerell). Tab. 1. 



Type.— Cat. No. 13189, U.S.N.M. 

 petalostemonis Robertson, 1900. Illinois (Robertson). Tab. 4. 



Near .1/. communis. 

 petulca Cresson, 1878. Georgia (Morrison). Tab. 1. 

 petulca suffusa Cresson, 1878. Texas (Belfrage, Heiligbrodt). 

 The Rev. G. Birkmann writes tliat he believes svffxisa to be a vahd species, distinct 

 from pelulca, but that males which have been ascribed to suffiisa reaUy belong to 

 petulca. He takes suffiisa during the first half of May, petulca from about the mid- 

 dle of May to the middle of June, 

 petulciformis Cockerell, 1906. Fedor, Texas (Birkmann). 

 Closely resembles J/, petulca. 



