J 32 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



duced and yellow in color, and in having a pair of small, approxi- 

 mated processes on tlie sixth sternite. This combination of secondary 

 sexual characters distinguishes it from the male of hinei Parker, 

 to which it has a superficial resemblance. The female of this species 

 can be distinguished from the female of hinei by the character of the 

 inner eye-margins,' which on this species are distinctly divergent at 

 tke clypeus. 



SPECIMENS EXAMINBD 



California: Los Angeles County (Coquillett). 



BEMBIX OCCIDENTALIS Fox 



Bembex occidentalis Fox. Proc. Acad. Cal. Sci., ser. 2, vol. 4, 1893, p. 10. — 

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

 p. 868.— Fox Proc. Acad. Nat. Sci. Phila., 1895, p. 362.— Daixa Tokre, Cat. 

 Hym., vol. 8, 1897, p. 509. 



Bembix occidentalis Parker, Proc. U. S. Nut. Mus., vol. 52, 1917, p. 106. 



Like the males of ppuinosa and beuterwiuUeri, the male of this 

 species has the seventh sternite developed in the form of a grooved 

 spine, and like beutenfnuUeri, it has a pair of small, approximated 

 processes on the sixth sternite. This species, in both sexes, is con- 

 spicuous for its extensive yellow maculations. The inner eye-margins 

 on both sexes are divergent at the clypeus. The mandibles are slen- 

 der, almost straight, and, even on the female, almost devoid of teeth 

 on the inner margin. 



SPECIMENS EXAMINED 



Arizona: Bill Williams Fork (August, F. H. Snow) ; Phoenix; Yuma (August 



14, 1905, H. Brown). 

 California. 



LowHUi Cali^-ouma : San Jose del Cabo. 

 New Mexico: (C. F. Baker). 

 Oregon: Van Sickle Canyon (September 13, 1904, E. S. G. Titus). 



BEMBIX INFUMATA Handlirsch 



Bembex infumata Handlirsch, Sitz. Akad. Wissensch, Wien, Math.-Nat. CI., 

 vol. 102, 1893, p. 841.— Dalla Torre, Cat. Hym., vol. 8, 1897, p. 506. 



Bembex iiubilipennis CAMEiiON, Biol. Centr.-Amer., Hym., vol. 2. 1888-1890, p. 101 

 (misidentification ) . 



The male of this species has the wings almost clear, while the 

 wings of the female are distinctly infumated at the base. On both 

 males and females the maculations are almost white. The second 

 and sixth sternites of the male bear conspicuous processes and the 

 sixth bears, in addition to the median process, a pair of well-devel- 

 oped lateral processes. Onlj'^ three specimens of this species are 

 found in the United States National Museum, a male and a female 



