104 PROCEEDINGS OF THE NATIONAL MUSEUM voi. 75 



In addition the process on the sixth sternite is strongly developed 

 into a median tubercle on this species and the maculations on the 

 sternites consist of only lateral spots. 



The female may be distinguished from zonata by the presence of 

 only lateral spots on the sternites instead of broad fasciae, and by the 

 lack of conspicuous maculations on the thorax and propodeum. 



This species is distributed over central and southern Europe. I 

 liave before me three males and seven females, of which one male 

 and two females were determined by Mercet. This male bears the 

 label, " Granja, G. Mercet," and the two females bear the label, 

 "Los Molinos [Spain], G. Mercet." One of the other males is la- 

 beled " Germany," and the second is labeled "Austria." Of the five 

 remaining females, three bear the label, "Austria " ; a fourth, the 

 label, "Valley of Ordera, Pyrenees (Seitz) 1400-1700 m."; and the 

 lifth is without a locality label. 



BEMBIX AMOENA Handlirsch 



Benibex amoena Handlirsch, Sitz. Akad. Wissensch. Wien, Math.-Nat. CL, 



vol. 102, 1893, p. 769.— Dalla Torre, Cat. Hym., vol. 8, 1897, p. 502. 

 BemMx amoena Parkehj, Proc. U. S. Nat. Mus., vol 52, 1917, p. 88. 



This species is very closely related to B. sayi Cresson. With re- 

 spect to the males, the only character upon which I can rely to 

 separate the two species is the length of the apical spur on the middle 

 tibia, which on atiwena is always relatively longer than on sayi. 

 Although there is some variation in the length of this- spur on each 

 species, it is, in the case of amoena^ approximately equal to or greater 

 than half the length of the middle metatarsus, whereas on sayi it is 

 always less, and usually very much less, than half the length of the 

 middle metatarsus. This difference in length of the tibial spur of 

 the middle leg holds for the females of the two species also, but 

 the difference in the maculations of the dorsum of the thorax and 

 propodeum of the females of the two species is more constant and 

 therefore more reliable than are any differences in maculations on 

 the males. 



SPECIMENS EXAMINED 



California: Yosemite (July 20, 1905, J. McFarland). 



North Dakota: (C. N. Alnslie). 



Utah: Beaver Creek Hills, Beaver County; Silver Lake (July 14, H. Skinner). 



Washington: Govan (August 6, 1911, Hyslop) ; Medical Lake (July 15, 1920, 



M. C. Lane) ; Soap Lake, Grand Coulee (June 29, 1902). 

 Wyoming: Butte (August 27, 1896, R. P. Currie) ; Yellowstone Park (July 17, 



1907, W. Robinson; August 4, H. Skinner). 



Handlirsch reports this species also from Colorado, Illinois, 

 Nevada, and British Columbia. 



