DOLICIIOPUS. 59 



2. Fourth longitudinal vein not broken. 



a. Antennae- red, at the utmost the third joint at the tip or almost 

 entirely black. 



a. Humeral callosities of the same color with the thorax. 



2S. D. liastatlis, nov. sp. % and ?. — Viridis, antennis rufis, arti- 

 culo tertio ex parte nigro, ciliis oculorum inferioribus flavis, tegularum 

 ciliis nigris, pedibus flavis, tibiis intermediis maris ante apicem per- 

 spicue, fceminae obsoletissime albido-notatis, tarsia intermediis maris 

 apicem versus compressis, fceinmae subcompressis, alarum vena longi- 

 tudinali quarta non fracta. 



Green ; antennae red; third joint partly black; cilia of the inferior orbit 

 yellow, cilia of the tegulae black ', feet yellow ; middle tibiae before the 

 tip with a white spot, which is very distinct in the % , and indistinct 

 in the 9 ; middle tarsi strongly flattened towards the tip in the % , and 

 more slightly in the J ; fourth longitudinal vein not broken. Long, 

 corp. 0.22. Long. al. 0.22—0.23. 



This species, distinguished by many peculiar marks, resembles 

 in the structure of the £ arista D. Sagittarius Loew, from Sibe- 

 ria. Bronze-green, shining. Face of the J* narrow and brassy- 

 yellow ; the face of the 5 is much broader, and has a grayish-yel- 

 low tinge. Palpi yellow, in the 9 towards the basis blackish. 

 Antenna? reddish-yellow ; their third joint short and rather 

 rounded ; its apical half black or brown ; the arista of the 9 is 

 plain and rather stout ; that of the J* is longer and more slender, 

 enlarged at the tip into the shape of a lancet-like lamel pointed on 

 both sides, the tip of which has a dingy-whitish coloring. Front 

 shining bluish-green. Cilia of the inferior orbit yellow. Fore 

 coxae yellow, upon the anterior side with a delicate black pubes- 

 cence. Middle and hind coxae grayish-black, only the extreme 

 tip and the trochanter yellow. Feet yellow. Hind femora before 

 the tip with a bristle. Middle tibiae with black tip, and before it, 

 in the £ , upon the upper side with a whitish spot, of which there 

 is hardly a trace in the ?. Hind tibiae at the tip blackish-brown, 

 in the £ upon the hind side with a narrow, linear, hardly distinct 

 glabrous stripe. The tarsi have the tip of the first joint, the four 

 following joints, and besides, the base of the first joint of the mid- 

 dle tarsi, black ; the three last joints of the middle tarsi of the £ 

 are distinctly, although not very strongly, flattened ; this is also 

 the case in the 9, but less perceptibly so; this part of the 

 middle tarsi viewed from the side seems distinctly stouter than 



