ZooL— Vol. II.] WHEELER— DOLICHOPODIDM. 3 



The locality of Loew's specimens is "North Red River." 

 These data show that the species is very widely distributed, 

 especially over the eastern half of the continent. 



2. Hygroceleuthus afflict us O. S. 



I collected both sexes of this species in great numbers in 

 a salt-marsh between Monterey and Del Monte, Calif., in 

 July. Two specimens from Professor Aldrich's collection 

 are marked "G. Zuni R. Arizona." 



3. Hygroceleuthus crenatus O. S. 



Plate I, Fig. 4. 



This species is also widely distributed. Osten Sacken 

 collected his specimens in California. Aldrich mentions 

 it from Washington, and has sent me specimens from 

 Idaho. I have taken it on the wet stones along creeks in 

 Western Wyoming in September. 



4. Hygroceleuthus ciliatus Aldrich. 



Ten specimens of this species were taken at the following 

 localities in Wyoming during August and September: Lusk, 

 Buck Creek, Dinwiddle Creek, Dubois (7,200 ft.), Two- 

 gwo-te-ee Pass, Jackson's Lake. The species occurs in 

 the rank grass along the water courses, in company with 

 H. crenatus. 



5. Hygroceleuthus Aldrichii, sp. nov. 



Plate I, Figs. 1-3. 



Male. Length 4-5 mm.; length of wing 3.5-4 mm. Bright metallic green 

 with coppery reflections. Palpi yellow, with black hairs; face with silvery 

 white dust below, ochreous above. Antennee of medium size, black ; first 

 and second joints yellow below on the mesial surface. First joint with consid- 

 erable black hair on its upper surface and a prominent projection on its mesial 

 surface; second joint rather short and but slightly yellow on the mesial surface; 



