AMERICAN DIPTERA. 353 



as the femora, the inflation of the tarsus gradually subsiding apically; pulvilli 

 reddish. Halteres large, yellow. Wings clear hyaline, stigma wanting, the 

 veins pale brown, normal, third vein furcate beyond the marginal cell, the hind 

 border of the discal cell two-thirds the length of the outward continuation of 

 that vein. 



One male, District of Columbia. In the Osten Saoken Collection 

 at the Museum of Comparative Zoology, Cambi-idge, Mass. 



Page 298. Enipis longipes Loew. 



In the male the tips of the front coxse, the forward side of the 

 middle ones and the outer half of the hind ones, together with the 

 underside of the hind trochanters are provided with conspicuous 

 black bristles. The hind trochanters are bordered apically with 

 black. In the female, the hairs are shorter and the black of the 

 trochanters is reduced to a spot. The tnale hypopygium is densely 

 covered with fine dusky hairs on the outer portion of the middle 

 lamellre, while the lower valve is fringed with fine black bristles. 



Page 301. Empis ariuipes Loew. 



The armament of the hind legs of the male is much like that of 

 mixopolia. 



Page 304. Empis stenoptera Loew. 



Dr. Loew makes no mention of an important secondary sexual 

 character of this species. The underside of the hind trochanters of 

 the male is provided with a fringe of black spiny scales, which 

 places the species in a group with tnida and cacuminifer. 



Page 309. Empis obesa Loew. 



This species measures eight mm. instead of three as given in the 

 Centuries. Having been led astray by this fact, Mr. Coquillett 

 established his ravida upon the same form. 



Page 322. 



The dubious poplitea is the same as serperastromm, the descrip 

 tion of which will have to go under the name of Loew's species. 



Page 330. Empiinorplia comautiM Coquillett. 



A male and a female, also from San Francisco, collected by Mr. 

 H. Edwards, are in tlie Loew collection at Cambridge. The male is 



TRANS. AM. ENT. SOC, XXVIII. (45) OCTOBEK, 190'J. 



