ZooL— Vol. II.] WHEELER— DOLICHOPODID^. 49 



posterior cross-vein one-third the length of the distal segment of the fifth 

 vein, which is complete to the very margin of the wing; sixth vein absent. 

 Halteres and tegulae yellow, the latter with white cilia. 



Female. Length 2.75 mm.; length of wing 2.75 mm. Proboscis large, 

 projecting, piceous, black at the base; palpi large, yellow, with a few long 

 black hairs. Face much broader than that of the male, covered with gray 

 dust. Third joint of antenna broader than long, its point much blunter than 

 that of the male. Wings more blackish and with more prominent anal angle; 

 sixth vein distinct. Legs plain; fore tarsi of about the same length as the 

 fore tibiae. 



Nine males and three females taken during September 

 in sweepings in the long grass near water-courses at the 

 following localities in western Wyoming: Little Wind River 

 Canon, Dinwiddle Creek, Buck Creek, Dubois (7,200 ft.). 



Sympycnus marcidus resembles Loew's S. tertianus from 

 Alaska. Both species have the third vein ending distinctly 

 before the tip of the wing and the third joint of the hind 

 tarsi fringed with long hairs in the male. In these 

 respects the two species agree with the European forms 

 (see Kowarz.) and differ from all the other North American 

 forms known to me. S . marcidus differs from S. tertianus 

 in having the first joint of the hind tarsi longer than the 

 second and the third longer than the fourth. 



48. Sympycnus lineatus Loeiv. 



Plate IV, Figs. 96-98. 



I have frequently taken this species in sweepings in dark 

 woods in several localities in Wisconsin, especially in Mil- 

 waukee and Price Counties. In the male the first joint of 

 the antennas is small and short, the second larger, the third 

 pointed oval. The arista is pale and rather sparsely pubes- 

 cent. In the female the third joint is smaller and has a 

 shorter, blunter point. The sixth vein is very nearly oblit- 

 erated; the posterior cross-vein is longer and much nearer 

 the posterior margin than in other species of Sympycnus 

 known to me, being about three-fifths as long as the distal 

 segment of the fifth vein. 



(4) " Sept. 18, 1S99. 



