ALDRICH: NEW GENERA AND SPECIES OF DOLICHOPODID^. 155 



segments; no yellow hairs on the sides. Hypopygium green at base, 

 black distally; the lamellae are small, white, rounded, with a rather 

 wide margin of black along the apex, where there are the usual curved 

 bristles. Fore coxae yellow, on the outer posterior part a greenish- 

 black stripe; on the anterior side with silvery dust and a few dark 

 hairs along the lower part. Middle and hind coxae black, the former 

 with yellow tips. Hind trochanters black, the middle ones with a 

 black spot. Femora and tibiae yellow, all the tarsi infuscated from 

 the tip of the first joint; fore tarsi simple, about as long as the tibiae; 

 the preapical bristle of the hind femur is the last and largest of a 

 series of bristles, beginning near the base of the femur. 



Wings hyaline, the anterior part a little yellowish, and the cross- 

 vein slightly clouded. The shape is broad, with an incision at the 

 tip of the fifth vein. The fourth vein ends before the apex; it has a 

 moderately strong curvature. Costa with a long, strong swelling near 

 the tip of the first vein. 



Female. Face broad, greyish-white; antennae as in the male; 

 cilia of tegulae larger than in the male, black, with a slight admixture 

 of pale. Wings narrower, less yellow anteriorly, costa not thickened. 



Length, 5.2 mm.; of wing, 4.8 mm. 



About 75 specimens, both sexes. 



Common at Moscow, Idaho, in September, at the edge of streams. 



I have deposited a set of types in the University of Kansas collec- 

 tion. 



In both sexes this species is distinguished from crenatus, O. S., by 

 having plain, short antennae. The male differs from afflictus, O. S., 

 in lacking the yellow fringes on the abdomen, while the female of the 

 former has a rather less abrupt curve in the fourth vein, but is very 

 much the same in other respects. 



HygTOceleuthus latipes, Loew. 



I found this specimen very abundant at Lake Mills, Wisconsin, in 

 August, on the bare mud adjoining water. In some places they 

 seemed almost to cover the surface. 



HygTOceleuthus crenatus, Osten Sacken. 



Abundant at Moscow, Idaho, in September, along the edge of 

 water. The specimen of which I figured the antenna in my previous 

 article is not far from typical, although I there referred to it as 

 a variety. 



Dolichopus tenuipes, n. sp. 



Male. Face rather narrow, yellow pollinose, below more grey; 

 palpi yellow; front green, with yellow dust; antennae moderately 



