66 Myron Harmon Szvenk 



distinct from crazi'fordi, since the mere difference in the breadth 

 of the lateral face marks used to separate the two by Cockerell 

 (Proc. U. S. Nat. Mns., XLI, p. 240) is a character of such 

 variability as to be useless in separating species in this group of 

 males, and a study of the description of ednae adds no character 

 not to be matched in the five Nebraska males of crazi'fordi. 



Nomada (Heminomada) civilis Cresson. 



1878. Nomada civilis Cresson, Trans. Am. Ent. Soc, VII, p. 78, d*. 

 1903. Nomada civilis Cockerell, Proc. Acad. Nat. Sci. Phil., pp. 581- 



82 and p. 584, 6 ?. 

 1905. Nomada civilis Cockerell, Bull. 94, Colorado Exp. Sta., p. 72 



and p. 78, d*. 

 1909. Nomada civilis Cockerell, The Entomologist, XLII, pp. 93-94, $. 

 ?i9io. Nomada civilis spokanensis Cockerell, Psyche, XVII, pp. 92-93, 

 ?. 



The writer refers here a series of three males and three females 

 from Sioux county, Nebraska, of which two of the males and 

 the three females were collected in May (L. Bruner), and the 

 other male in Warbonnet canyon, June 13, 1901, on Rosa 

 arkansana (M. Cary). These three males agree exactly with 

 Cresson's description oi N. civilis, based on nine males from 

 Colorado, except that one has yellow spots both on the sides of 

 the propodeum and the enclosure (propodeum entirely black in 

 the other two). The females, however, do not agree with the 

 descriptions of Cockerell's determinations of that sex of N. 

 civilis, either with the specimens from Troublesome, Colorado, 

 Corvallis, Oregon, or the named variety, spokanensis, from 

 Spokane, Washington. They are closest to the Colorado female 

 (which was collected in company with ^f civilis), but differ in 

 the yellow orbital margins, yellow tegulae, mostly yellow spots 

 on sides of propodeum, the red supraclypeal mark and scape in 

 front, the black ground color of the abdomen and mostly black 

 mesopleura, deeply infuscated flagellum, narrowly interrupted 

 band on tergite i, white hair on mesoscutellum and metanotum, 

 etc. They are much smaller than the forms from Corvallis and 

 Spokane, differing further from the former in the red scape, 

 largely red pleural mark, much red-margined propodeal spots, 



66 



