110 PROCEEDINGS OF THE NATIONAL MUSEUM vor,. 75 



the male are but slightly infumated or, in the majority of specimens, 

 entirely clear. The male may be distinguished from other North 

 American species, except insularls, Infumata and hainata, by the 

 presence of lateral processes on the sixth sternite. From insularis 

 it may be distinguished by the character of the genital stipes and by 

 the fact that the fasciae on the tergites of irisuluris are white, 

 whereas on tliis species they are yellow. The female of this species 

 is not likely to be confused with any other North American species 

 except melanmpis, which is distinguished from it by liaving more 

 or less black on the cjypeus, whereas nuhill'penms has the clypeus 

 wholly yellow. 



SPECIMENS EXAMINED 



CoLOEADo: Walsenburg. 



Illinois: .Taeksonville (July, 1900, Grain). 



Iowa: Fairfield (T. C. Ross). 



Kansas: Wilson (August, 1909, J. B. Parker). 



Mexico: Lerdo, Durango (June 10, 1918). 



Nebraska: Grand Island (July 5, 1897). 



New Mexico: Koehler (W. H. Walton). 



Oklahoma: Durant (June, 1905. F. C. Bishopp). 



Tennessee. 



Texas: Bryant; Childress (September 1. 1908, E. S. Tucker) ; Corsicana (May 



16, 1907, R. A. Cushman) ; Marfa (June 6, 1908, Mitchell and Cu.shman) ; 



Paris (A. L. Melander) ; Piano (.July 14, 1907. E. S. Tucker) ; Wichita 



Falls (June 10. 1906, J. D. Mitchell). 



BEMBIX MERCETI. new naroe 



. Figures 129-133 



Bcmbex handlirschi MEBCirr, Bol. R. Soc. esp. Hist. nat.. 1904, p. 343 (not 

 Cameron, Fauna and Geography of Maldive and Laccadive Archiiielago, vol. 

 1, Pt. 1. 1901, p. 57). 



There are in the United States National Museum a male and a 

 female of this species identified by Mercet and received from him 

 in an exchange. The male of this species is well marked. Tlie 

 anterior tibia at its distal end is somewhat dilated; the middle tibia 

 is distinctly curved, the concave surface being on the outer side, and 

 its anterior distal border at the apex is produced into a spinelike 

 process that subtends a short spine; the distal end of the middle 

 metatarsus is distinctly flattened ; the posterior border of the middle 

 femur is dentate. Both second and sixth sternites bear processes and 

 the seventh sternite bears prominent lateral carinae and a broad 

 median longitudinal area resembling somewhat a process. The 

 seventh tergite is broadly rounded at the apex and bears a short, 

 median, apical, dorsal depression. At the posterior lateral angles of 



