ABT. 25. XEW SPECIES OF THE GENUS DOLICHOPUS ALDEICH. 13 



yellow. Abdomen green with bronze reflections and slight prui- 

 nosity. Hypopygium large, black, the lamellae oval, whitish, with 

 black border which is rather wide above as well as apically, the apex 

 has a few small incisions and longer bristles. 



Legs yellow, middle and hind coxae black, front coxae blackish 

 at base for about one-third the length and on the outer side for two- 

 thirds; hind femora not ciliated, decidedly infuscated at tip; hind 

 tibiae black on the apical fifth and their tarsi entirely black; front 

 and middle tarsi infuscated from the tip of the first joint, the front 

 ones about one-third longer than their tibiae, the last two joints dis- 

 tinctly flattened but w^ithout lateral fringes of any size; when 

 viewed from above the second and third joints appear very narrow 

 emphasizing the breadth of the last two. They arc all of a grad- 

 ually decreasing length. 



Wings slightly infuscated or sul)hyaline, of ordinary shape; the 

 costa wnth a rather short enlargement at the tip of the first vein. 



Female. — Face dull gray, wider than in the male; front coxae 

 almost entirely black; hind femora rather more broadly infuscated 

 at tip. Wings distinctly wider than in the male. 



Length 3.8 mm. 



Described from 4 males and 1 female taken by the writer at 

 Tennessee Pass, Colorado, altitude 10,240 feet (3.12 kilometers). 

 July 10. 1019. 



ry/?^.— Male. Cat. No. 25194, U.S.N.M. 



DOLICHOPUS LONGUS. new species. 



i1/rt/<?.— Agrees very closely with fortify except in tlic following 

 characters: Face dull brown instead of shining brownish-yellow; 

 fore and middle femora with long hairs below on lower hind edge, 

 subciliate: cilia of hind femora wholly black; hind tibiae more thick- 

 ened ; lamellae almost wholly blackish, only on the central and basal 

 part a trifle lighter in color. Size and elongate form the same in 

 both, and the elongate brownish wings are the same. 



Four males, Tennessee Pass, Colorado. July 10 and 11, 1919. col- 

 lected by the writer. 



7yp^._Male. Cat. No. 25195. U.S.N.M. 



DOLICHOPUS RECTiroSTA. new species. 



Male. — Front deep blue, at the sides very narrowly Avhitish. The 

 face narrow, silvery white. Palpi black. Antennae short, entirely 

 black. Orbital cilia Avhite except a few of the upper ones. 



Mesonotum deep blue with greenish reflections and in some lights 

 a Avliitish pollinose triangle on each side of the suture. Scutellum 

 deep blue. Pleurae bluish green, very thinly dusted. Cilia of the 

 ralypters black. Halteres light yellow. Abdomen greenish blue, 

 the incisures narrowly blackish, at sides of the segments with thin 

 silvery pruinosity. Hypopygium rather small, black; the lamellae 

 20107— 22— Proc. N. M. vol. 61 44 



