606 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



reaching about to middle of the third, the latter widely sejiarated from the 

 first, only connected by a cross vein, apex of third near seven-eighths length 

 of wing, fourth forking slightly before the small cross vein ; length, 2 mm. 



siihaxper, new species. 

 Two female specimens. Marlboro, Maryland (May 13, H. S. Barber), and 

 Mesilla, New Mexico (T. D. A. Cockerell). 



7}//A.— Cat. No. 5478, U.S.N.M. 



25. Front and middle tarsi each furnished with the usual pair of claws, of an equal 



length and not toothed 26 



Front and middle tarsi each furnished with a single very long claw, which 

 bears a small one near base of under side, last tarsal jcjint about twice as long as 

 the preceding, femora destitute of spinous bristles, first vein reaching one-fifth 

 length of the third, the latter separated but connected by a crossvein, apex of 

 third near three-fourths length of wing 27 



26. Wings marked with three brownish spots or bands, the first near center of first 



basal cell, the second beginning at basal part of third vein and extending to apex 

 of lower branch of fifth, the last beginning on costa beyond apex of third vein 

 and extending into the second posterior cell; also a small brownish spot near center 

 of anal cell. Headandfirstantennaljointbrownish black, remainder of antennae 

 yellow, the apex brown, the hairs yellow, tipped with brown; eyes contiguous; 

 thorax black, mesonotum opaque, densely gray pruinose and marked with large, 

 mostly confluent spots and isolated dots of brown; scutellum yellow, the fr(»nt 

 corners brown; abdomen polished, black, basal half of the dorsum yellowish, 

 knobs of halteres whitish ; legs brownish l)lack, tarsi yellow, femora destitute of 

 spinous bristles on the under side, hind tarsi on under side bearing a spine at 

 base of first joint and a pair at apices of first two joints, last two joints of nearly 

 an equal length, destitute of spinous liristles; first vein reaching about to middle 

 of the third, the latter separated but connected by a crossvein; apex of third 

 near three-fourths length of wing, fourth forking slightly beyond the small 



crossvein; length, nearly 2 mm ndmlosus, new species. 



A male specimen, collected June 19 by ^Ir. C. W. Johnson. Riverton, New Jersey. 



Type.— Cut No. 54T9, U.S.N.M. 



Wings unmarked, hyaline. Brownish black, knobs of halteres whitish, tarsi 

 yellow; joints three to five of antennte broader than long, eyes very widely 

 separated, mesonotum and abdomen highly polished, femora and tarsi destitute 

 of spinous bristles on the under side, last tarsal joint almost twice as long as the 

 preceding; first vein almost reaching middle of the third, the latter lying close 

 to the first, with which it is connected by a crossvein; apex of third almost at 

 two-thirds length of wing, lower branch of fourth obliterated at its base; length, 

 1 nun politus, new species. 



A female specimen, collected April 2. Cambridge, Massachusetts. 



Type.—Cat. No. 5480, U.S.N.M. 



27. A])domen green 28 



Abdomen black. Black, the antenme and legs yellow, first joint of antennje and 



the mouth parts yellowish brown, middle and hind coxse and their femora 

 brown; eyes contiguous, antennae nearly as long as the head and body, each 

 joint, except the first, over twice as long as broad, mesonotum and abdomen 

 highly polished, last joint of each tarsus bearing a transverse pair of blunt 

 spines near base of under side; wings hyaline, fourth vein forking far beyond 



the small crossvein; length, 1.5 mm (iiiiriirialis, new species. 



Two females, collected by the writer in June. District of Columbia. 



Type.— Cat. No. 5481, U.S.N.M. 



