ART. 25. XEW SPECIES OF THE GENUS DOLICHOPUS .\LDEICH. 11 



Wings hyaline, of ordinary shape; the anal angle not very promi- 

 nent. The costa with a long tapering enlargement from the junc- 

 tion of the first vein. 



Female. — Face yellow, twice as wide as the male, dull white in 

 color. Third antennal joint of ordinary form. The front femora 

 with quite distinct traces of brown above and below; the middle 

 femora with faint brown tinge below ; hind femora with the tip 

 deeply infuscated. Costa not enlarged. Otherwise as in male. 



Length 3 mm. 



Described from 6 males and 1 female, all from Healy, Alaska, 

 except 2 males which are from Camp 327, Alaska. Collected by 

 the writer. 



Type.—M2lQ, Cat. No. 25191, U.S.N.M., from Healy, Alaska. 



Runs to sincerus in the table of Bulletin 116, page 17, but has 

 much longer antennae and a strong thickening of the costa. 



DOLICHOPUS INFLATUS, new species. 



Male. — Front green, iace light golden yellow. Palpi yellow. 

 Antennae of ordinary size, the first joint wholly yellow, the others 

 black. Orbital cilia white except a few above. 



Mesonotum and scutellum bluish green, moderately bright with a 

 coppery stripe at the suture. Pleurae green, moderately dusted with 

 gray. Cilia of the calypters black, rather abundant. Halteres yel- 

 low. Abdomen bright green, rather coppery on the posterior part 

 of each segment, almost wholly shining. Plypopygium rather small, 

 black, the lamellae oval, white, with a narrow black margin, the tip 

 incised and furnished with the usual long bristles. 



Wings slightly brownish, more so toward the costa, rather narrow 

 in shape, the hind border distinctly emarginate between the fifth 

 and sixth vein ; anal angle prominent ; costa with an elongated swell- 

 ing at the junction of the first vein. 



Legs yellow, the middle and hind coxae black except at tip ; hind 

 femora not ciliated; all the tarsi plain, pale at base; the middle 

 tibiae with a smooth, white inflated portion on the outer side of the 

 •apical fourth. The front coxae have rather conspicuous black hairs 

 on the anterior side. 



Length 4.8 mm. 



Described from one male taken at Anchorage, Alaska, July 20, 

 1921, by the writer. 



T^yy^e.— Male, Cat. No. 25192, U.S.N.M. 



The structure of the middle tibia is about the same as in fulvipes., 

 but the latter has the antennae elongated and almost entirely yellow, 

 with several other differences. The species runs to fulvipes in the 

 table in Bulletin 116, page 26. 



