DIPTERA 



425 



Type. — Cat. no. 5235, U. S. National Museum. 



Closely related to the European D. atritibialis Zetterstedt, but the 

 latter is credited with having the antennae yellow, the apex and upper 

 side of the third joint black, the face silvery white pruinose and the 

 hind femora bare on the under side. 

 Dolichopus varipes sp. nov. 



Differs from the above description of barycnemus only as follows : 

 Lower half of first two joints of antennai yellow, fore coxai wholly 

 yellow, hind femora wholly black, only pubescent on the under side, 

 middle femora each with a black spot on the median third of the under 

 side, hind tibias only slightly swollen, yellow, the apical sixth (less on 

 the outer side) brownish black, last two joints of front tarsi not com- 

 pressed nor dilated, first joint of middle tarsi shorter than the three 

 succeeding joints taken together, the first three joints slender, yellow, 

 the two others black, compressed and fringed with bristles on the 

 upper side, the fourth joint twice as wide as the third, slightly wider 

 and one-third longer than the fifth ; wings wholly hyaline, costa not 

 thickened at apex of first vein ; female as in the male except that the 

 middle tarsi are like the front ones. Length about 5 mm. A specimen 

 of each sex, collected July 8 and 10. 



Habitat. — Popof Island, Alaska. 



Type. — Cat. no. 5236, U. S. National Museum. 



Differs in the coloring of the femora from any other species known 



to me. 



Dolichopus longimanus Loew. 



Dolichopus longimanus Loew, Neue Beitr. Kennt. Dipt., viii, p. 14, 1861. 

 Monog. Dipt. N. Am., 11, p. 38, 1864. 



Metlakahtla, in June; Kukak Bay, July 4; Kadiak, Alaska, July 



20 : Twenty-seven specimens. Originally described from English 



River, British America ; it has also been reported from New York, 



New Hampshire, and South Dakota. 



Dolichopus plumitarsis Fallen. 



Dolichopus plumitarsis Fallen, Diptera Sueciae, Dolich., p. 10, 1823. — 

 ScHiNER, Fauna Austriaca, Dipt., i, p.216, 1862. — Zetterstedt, Dipt. 

 Scand., 11, p. 556, 1843. 



Kukak Bay, July 4; Popof Island, Alaska, July 10: Three male 

 specimens. A European species, not heretofore reported from this 

 Continent. 



Dolichopus lobatus Loew. 



Dolichopus lobattis'LoK^N, Neue Beitr. Kennt. Dipt., viii, p. 24, 1861. Monog. 

 Dipt. N. Am., II, p. 72, 1864. 



