I 



ART. 5 GENERIC REVISION OF THE FOSSORIAL WASPS PARKER 161 



bearing the label, " California " ; the allotype, bearing the label " Los 

 Angeles Co., California " ; and a. male bearing the label, " Bill Wms. 

 Fork, Ariz., Aug., F. H. Snow." 



MICROBEMBEX HIRSUTA Parker 

 Figure 66 



iMicrobemhex hirsuta Parkb3i, Proc. U. S. Nat. Mus., vol. 52, 1917, p. 122. 

 The male of this species may be distinguished from the male of 



\inanodonfa by the form and the hirsute character of the process on 

 the second sternite. It is further distinguished from vionodonta by 

 the form of the genital stipites. The females are distinguished from 

 the female of iiwnodonta by the unusual development of the pubes- 

 cence on the liead, thorax, and propodeum, especially on the dorsum 

 of the propodeum. On many of the females that I have referred to 

 this species the black on the abdomen has been replaced by brown of 

 varying shades. These brown forms are believed to be specimens 

 that were captured just after emergence from the pupal condition. 



SPECIMENS EXAMINED 



Arizona: Yuma (August, 1905,- Hbt. Brown). 

 California: Bard (July 22, H. R. Reed). 



Texas: Rio Grande, near Boquillas, Brewster County (June, 1908, Mitchell and 

 Cushnian). 



MICROBEMBEX MONODONTA (Say) 

 Figures 9, 10, 65 



Bembex monodonta Say, Nar. Exp. St. Peters River, Append., 1824, p. 335. — 

 Handlirsch, Sitz. Akad. Wisseusch. Wien, Math.-Nat. CI., vol. 102, 1893, 

 p. 882. 



Microhembex monodonta Patton, Bull. U. S. Geol. Surv., vol. 5, 1879, p. 362. — 

 Pabkee, Proc. U. S. Nat. Mus., vol. 52, 1917, pp. 119, 134. 



Microbemiex tarsalis Rohwer, Proc. U. S. Nat. Mus., vol. 47, 1914, p. 516. 



This seems to be the most widely distributed species among the 

 Bembicids of the western continent. It has been reported from prac- 

 ticallyr every State in North and South America. Among the hun- 

 dreds of specimens I have examined, representing localities widely 

 distributed over both North and South America, I find great varia- 

 tion in the color of the maculations, in the extent to which these 

 maculations are developed, and tlieir distribution on the body. So 

 far, I have been unable to jfind any structural variations to correspond 

 to these color variations, and, in fact, no consistency in the color 

 variations themselves. I am, therefore, obliged to consider this large 



22764—29 11 



