DOLICHOPUS. 51 



upon their basal half on the inside glabrous. Hind tarsi usually 

 quite black ; sometimes their first* joint, with the exception of the 

 tip, is only brownish or even yellowish ; more seldom the basis of 

 their second joint has also the same lighter coloring. Cilia of the 

 tegulaa yellowish. Wings grayish hyaline, of rather equal breadth ; 

 the costa has in the g near the tip of the first longitudinal vein a 

 slight swelling ; the fourth longitudinal vein is not broken ; sonic- 

 times the apical portion of the anterior part of the wings shows a 

 somewhat stronger grayish tinge. 



Hab. New York. (Osten-Sacken.) 



Observation. — D. variabilis is more variable in the coloring of 

 the posterior tarsi than is usually the case with the species of the 

 genus Dolichopus. I have received a female as belonging to the 

 variety of D. variabilis, having light feet, which has the tegulaa 

 ciliated with black, and differs besides from the other females un- 

 doubtedly belonging to D. variabilis, by the more clayish-yellow 

 color of its wings. I cannot take it for the ? of the present spe- 

 cies. In the coloring of the wings and in several other characters it 

 approaches very much D. luteipe?inis, but as its hind tibiae are 

 without blots, it may perhaps not even belong to this species. I 

 possess also some other females which I can only distinguish from 

 the above described ? of D. variabilis by their black ciliated tegulae. 

 It seems therefore that either the females vary in the coloring of 

 the cilia, or that we have here two exceedingly similar species. 



22. D. luteipennis Loew. % . — Laete viridis, facie albida, antennis 

 runs, oculorum ciliis inferioribus albidis, tegularum ciliis flavicantibus, 

 pedibus flavis, tarsis maris simplicibus, alis lutescentibus. 



Handsome green ; face whitish ; antennse red ; cilia of the inferior orbit 

 whitish ; cilia of the tegulae yellowish ; feet yellow ; the fore tarsi of the 

 % plain ; wings yellowish. Long. corp. 0.19. Long. al. 0.19. 



Syn. Dolichopus luteipennis Loew, Neue Beitr. VIII, 18, 15. 



Handsome green, moderately bright. The color of the face 

 whitish, only upon its upper part somewhat more yellowish. An- 

 tennas yellowish-red ; their third joint short-ovate, perceptibly in- 

 fuscated at the tip. Front bright, green-blue. Cilia of the in- 

 ferior orbit whitish. Upper side of the thorax dusted, and hence 

 somewhat dull, with a rather distinct brassy -yellow middle line. 

 The pubescence of the abdomen is whitish, not only on the lateral 



