154 KANSAS UNIVERSITY QUARTERLY. 



arista arises from about the middle of the upper edge, and is scarcely 

 longer than the three joints taken together. Cilia of the inferior orbit 

 pale. Thorax short and rounded, brownish black, not shining, with 

 stout black bristles above, cilia of the tegular pale. Dorsum and pleurae 

 grey pollinose. Halteres yellow. Abdomen slender, clavate, the 

 first segment brownish, the second yellow, the third reddish brown, the 

 following ones passing into black. Hypopygium black, but little 

 protruding, the sides of the first abdominal segment have a few widely 

 divergent yellow hairs. Coxae yellow, the middle ones brown at 

 base, the leaf-like upper extension of the hind ones (metathoracic 

 epimera, Loew, Monogr. Dolich., p. 96) also yellow. Legs and feet 

 yellow, the latter only a little darker toward the tip (hind feet miss- 

 ing), the fore tarsi are longer than their tibiae; the first joint com- 

 prises nearly half the length, and has on the lower surface near the 

 base two or three noticeable hairs; the second joint one-third as long, 

 thickened; the following joints slender, short, of equal length. The 

 middle tarsus is plain, slender, once and a half as long as its tibia. 

 Hind femora and tibiae plain. Wings yellowish, very broadly 

 rounded at the tip, and narrowed towards the base; the third and 

 fourth veins beyond the cross-vein are parallel, then the latter gently 

 approaches the former, then they continue parallel to the end. 



Female. Face rather wide, wholly grey dusted; antennae inserted 

 as in the male, the first joint lengthened a little less, and the third 

 joint smaller, rounded. Abdomen wholly yellow, verging somewhat 

 into brown. Legs plain. Wings not broadened at tip nor narrowed 

 basally. 



Length, 3-3.5 mm.; of wing, 2.5-3 '^^"^• 



Two specimens — male and female — Wyoming (University of Kan- 

 sas collections.) 



Additions to my Revision of Hygrocelenthus and Dolichopus, 



(in the A'. ( . (Judr/rr/v ior ju\y, 1S93.) 



Hygrocelenthus idahoensis, n. sp. 



Male. Face moderately wide, snow-white pollinose; palpi yellow; 

 front shining green. Antennae black, not larger than in an average 

 Dolichopus, but the first joint with a swollen yellow protuberance 

 on the inner side; the second joint also slightly yellow on the inner 

 side; arista rather stout. Cilia of inferior orbit snow-white, flattened, 

 conspicuous. Dorsum of thorax shining bluish-green, the dark stripe 

 above the root of the wing almost wholly absent; pleurae green, with 

 thin dust; cilia of tegulae pale, not large. Abdomen bright blue- 

 green, with rather stout bristles along the posterior margins of the 



