REVISION OF GENUS EUCERCERIS CRESSON 45 



patches on sterna 4 and 5, all of which are creamy yellow; broad rows 

 of bristles on sterna 3 and 4, a small divided cluster of short bristles 

 on sternum 5; pygidium as shown (fig. 80c). 



The series of males taken at the type location Sept. 30, 1963 was 

 taken at the same time and place as a series of females of E.ferruginosa 

 Scullen and may prove to be the unknown male of that species. 



Type. — The cf type of E. mojavensis Scullen was taken 7 mi. E. 

 of Mojave, Kern County, CaHf., Sept. 30, 1963 (K. L. Westcott). 

 It is at the University of California at Davis. 



Paratypes. — California: 4cf cf, 7 mi. E. of Mojave, Kern County, Sept. 30, 

 1963 (R. L. Westcott); cf, Lone Pine, Inyo County, June 18, 1937 (E. C. Van 

 Dyke). 



Distribution. — Eastern Kern County and Inyo County Calif. 

 Prey records. — None. 

 Plant records. — None. 



23. Eucerceris montana Cresson 



Figures 27, 28, 81 a, b, c, d, e, f, g, h, i 



Eucerceris montanus Cresson, 1882, pp. vi, vii, viii; 1887, p, 281. — Ashmead, 1899, 

 p. 295.— Viereck and Cockerell, 1904, pp. 84, 85, 86, 87.— Cresson, 1916, 

 p. 101— Mickel, 1917, pp. 454, 456.— Scullen, 1939, pp. 17, 18, 54-56, figs. 

 33, 47, 74, 88, 107, 121, 134a, 155; 1948, pp. 157, 158, 180; 1951, p. 1012; 

 1961, p. 49 



Cercen's montana Dalla Torre, K. W. Von, 1890, p. 201. 



Cerceris sonorensis Cameron, 1891, p. 129. 



Type. — The lectotype female of E. montana Cresson from Montana 

 (Morrison) is at the Philadelphia Academy of Sciences, no. 1946. The 

 holotype male of Cerceris sonorensis Cameron from northern Sonora, 

 Mex., is in the British Museum, no. 21. 1, 435. 



Distribution. — Although this species was described from one 

 female and two males from "Montana" the writer has never seen any 

 other specimens from that far north. The most northern records are 

 three males from northern Utah and a female from Sterling, Colo. 

 We have found E. montana Cr. common to abundant in southern 

 Arizona, southern New Mexico and western Texas. It has been col- 

 lected by the \vriter and others south of the border over the central 

 plateau area of Mexico as far south as the states of Jalisco and San 

 Luis Potosi. 



Prey records. — Abundant as this species is nothing is known 

 relative to its nesting habits or the prey used as food for the young. 



Plant records. — Acacia sp. (Texas). A. gregii (Texas). Asclepias 

 linaria (Mexico: Zacatecas). A. suhverticillata (New Mexico). Bac- 



