WASP GENUS CERCERIS — SCULLEN 



497 



Distribution. — Through the Northeastern States and southeastern 

 Canada, west to Minnesota and south to Vh-ginia. 

 Prey record. — None. 

 Plant record. — None. 



Figures 90-92. — Localities of: 90, C. nigrescens arelate Banksj 91, C. 

 Mickel; 92, C. nitida Banks. 



nigrescens munda 



63c. Cerceris nigrescens munda Mickel 



Figures 91, 171a, b,c 



Cerceris munda Mickel, 1917a, p. 337.— Banks, 1947, p. 18.— Scullen, 1951, p. 1009; 



1960, p. 79. 

 Cerceris abbreviata Banks, 1919, p. 84; 1947, p. 17. 



Female. — Structurally close to C. nigrescens nigrescens F. Smith. 

 Markings yellow and often more extended than in the typical sub- 

 species, especially noticeable in the amount of yellow on the venter 

 and the hindfemora. As indicated, the yellow forms take over in 

 southern Oregon and become the dominating form in California; 

 however, the yellow form has been taken in Washington, where the 

 type of C abbreviata Banks was taken. 



Male. — ^As m the female, the male of the subspecies munda differs 

 from the typical form only in the more yellow markings. 



The subspecies C. nigrescens munda Mickel is very close to C. 

 aegualis aegualis Provancher, which is also confined largely to Cali- 

 fornia. The principal difference is in the form of the clypeal process of 

 the female, which is very distinctive. So far, the males of C. aegualis 

 aequalis Provancher have not been distinguished. It is probable they 

 are being confused with the males of C. nigrescens munda Mickel. 



Types. — The type female and allotype male of C. munda Mickel, 

 both collected at Sacramento, Calif., by L. Bruner, on Oct. 6, 1916, 

 and Oct. 3, 1916, respectively, are at the University of Nebraska. 



