Studies of North American Bees 29 



taken D. ulkei in copula, both at Monroe canyon, Sioux county, 

 Nebraska, and at Custer, South Dakota. 



SPECIES FROM OUTSIDE NEBRASKA 

 Dianthidium (Dianthidium) simile (Cresson). 



1878. Anthidium simile Cresson, Proc. Ent. Soc. Phil., II., pp. 378-380, 



? c?. 

 1904. Dianthidium simile Cockerell, Bull. Sou. California Acad. Set., 



Ill, p. 6. 



1908. Dianthidium simile Cockerell, Proc. Ent. Soc. Wash., IX, p. 72. 

 191 1. Dianthidium simile Cockerell, Proc. U. S. Nat. Mus., XL, p. 248. 

 191 1. Dianthidium simile Graenicher, Bull. Milwaukee Pub. Mus., I, 



p. 244. 



Two females collected at Port Hope, Ontario, July 28, 1895 

 (W. H. Harrington, Nos. 52 and 53) are evidently referable to 

 D. simile, with which they agree in size (8 mm.), but the legs are 

 darker than indicated in Cresson's description for simile, as only 

 the knees and narrow stripes on the outer face of the first four 

 tibiae, and a basal spot, produced behind, on posterior tibiae are 

 yellow, while in typical simile the knees and outer faces of the 

 tibiae and tarsi, except oblong black spots, are yellow ; thus in the 

 color of the legs the Ontario females agree more closely with 

 D. parvum. 



Dianthidium (Dianthidium) parvum (Cresson). 



1878. Anthidium parvum Cresson, Trans. Am. Ent. Soc, VII, p. 114, 



1897. Anthidium pudicum Cockerell, Canadian Entomologist, XXXIX, 



pp. 272-273 (in part). 

 1900. Anthidium {Dianthidium) parvum Cockerell, Ann. Mag. Nat. 



Hist., series 7, V, p. 413 (in part). 



1909. Dianthidium parvum Cockerell, Entomological News, XX, p. 262. 

 191 1. Dianthidium parvum Cockerell, Proc. U. S. Nat. Mus., XL, 



p. 248. 



A female from Laramie, Wyoming, agrees with Cresson's de- 

 scription of parvum except that it is 8 mm. long and the three 

 spots on tergite i are very narrowly connected to form a band ; 

 the clypeus and tergite 6 are entirely black. This specimen is ex- 



29 



