284 BUULETIN 116, UNITED STATES NATIONAL MUSEUM. 



finger-like projection on upper edge extending over the claws, this 

 projection is two-thirds as long as the main portion of the joint 

 and a little enlarged at its tip. First two joints of middle and hind 

 tarsi scarcely infuscated at tip (the remaining joints of middle tarsi 

 missing in the type specimen). Calypters and halteres yellow, the 

 former with black cilia with one or two pale hairs among them. 



Wings (fig. 208) grayish, very slightly tinged with yellowish brown 

 along the front; costa without an enlargement at tip of first vein; 

 last section of fourth vein bent beyond its basal third; hind margin 

 of wing scarcely indented at tip of fifth vein, nearly evenly rounded, 

 the anal angle being rounded, not prominent. 



Described from male taken in Louisiana by Pilate (from the 

 J. M. Aldrich collection). 



Type.— Male, Cat. No. 23059, U.S.N.M. 



No. 209. DOLICHOPUS DUPLICATUS Aldrich. 



Dolichopus dupKcatus Aldrich, Kansas Univ. Quart., vol. 2, 1893, p. 18, pi. 1, 

 fig. 21, and p. 157. 



J/a?e.— Length 4.75-6 mm.; of wing 4.5-5.5 mm. Face rather 

 wide, a little narrowed below, yellowish or yellowish white. Front 

 green, the ground color often nearly concealed by yellowish pollen. 

 First two antennal joints yellow; third black, as long as wide, 

 obtusely pointed at tip. Lateral and inferior orbital cilia yellowish, 

 about four of the upper cilia on each side black. 



Thorax green; dorsum thickly covered with yellowish pollen, 

 which is thinner on the posterior portion, suture metallic brown with 

 a line of the same color running back over the root of the wings; 

 pleurae dulled with white pollen. Abdomen green with coppery 

 reflections on the posterior margins of the segments; the white 

 pollen on its sides abundant. Hypopygium black; its lamellae 

 (fig. 209a) very large, whitish, sometimes a little tinged with yellow; 

 twice as long as wide, with a deep emargination on the upper edge, 

 which extends a little less than half the width of the lamellae, as 

 wide on the margin as it is deep and somewhat triangular, thus 

 forming two lobes on upper edge, the inner or basal one rather widely 

 bordered with black on outer edge and fringed with delicate but 

 rather long black hairs, outer lobe rather pointed above, narrowly 

 bordered with brown, deeply incised on apical edge, which is fringed 

 with delicate black hairs, there being no branched bristles such as 

 are usually found on the jagged edge of the lamellae; lower edge 

 fringed with short black hairs, which become shorter and ])ale near 

 the base of the lamella. 



Coxae, femora and tibiae yellow. Middle coxae largely blackish on 

 outer surface; anterior surface of fore tarsi with little black hairs 

 and a few minute yellow ones on outer corner near the base. Middle 

 and hind femora each with one preapical bristle, the latter nearly 



