THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 265 



Type locality. — Palisades, New Jersey, June. 



This is very much like scoparius Loew, but differs greatly in the 

 form of the lamellae of the hypopygium, still even these are aUke in 

 being very thick, smooth, and rather dark yellow, but there appear 

 to be four lamellae in guadrilameUatus while there are only two in 

 scopatius. The females look very much ahke, but the fore tarsi are 

 quite distinctly infuscated or black from the tip of the first joint, and 

 the fore coxae have a large black spot at base in scoparius; while in 

 quadrilameTlotus the fore coxae are wholly yellow or nearly so and 

 the fore tarsi are black at tip, not distinctly infuscated from tip of 

 first joint, but usually distinctly yellow to base or even the tip of 

 third joint. 



Types. — In Museum of Comparative Zoology, Cambridge, Massa- 

 chusetts. 



No. 194. DOLICHOPUS LACINIATUS Coquillett. 



Bolichopus ladniatus Coquillett, Canadian Entomologist, vol. 42, p. 42. 

 Male. — Length 5 mm. ; of wing 4.75 mm. Face rather narrow, not 

 as mde in the center as the width of the third antennal joint, silvery 

 white, tinged a little with yellow on upper portion. Front violet or 

 green, with a little white pollen along the orbits. Antennae black, 

 first joint yellow below for more than half their width; third joint 

 about as wide as long, pointed at tip. Inferior orbital cilia yellow, 

 the black cilia descending about one-third of the eye height. 



Thorax green with violet or bronze reflections; dorsum a little 

 dulled with brown pollen, this pollen is sometimes gray, always so 

 along the front; pleurae dulled with white pollen. Abdomen green 

 with slight bronze reflections; the white pollen on its sides not very 

 abundant. Hypopygium black; its lamellae of moderate size, some- 

 what round in outline, still with nearly a right angle at lower apical 

 corner, whitish with moderately wide black border on apical margin, 

 which is jagged and bristly on its lower half, fringed above with little 

 hairs which are partly black and partly pale. 



Fore coxae yellow with more or less brown at base even in front 

 and with a rather large blackish spot at base on outer surface, in one 

 specimen the outer surface is half blackish. Middle and hind coxae 

 black with yellow tips. Fempra and tibiae yellow. Middle and 

 hind femora each with one preapical. bristle, the latter ciliated with 

 long yellow hairs for half their length on lower inner edge, the long- 

 est of these hairs considerably longer than the width of the femora. 

 Middle tibiae with three bristles below, two near apical, and one near 

 basal third, their basitarsi with one large bristle above. Posterior 

 tibiae a little stouter than the others; the usual glabrous stripe on 

 upper surface wide and extending their whole length, but somewhat 

 broken at apical third by two bristles and a few hairs; inner surface 

 with another glabrous stripe which is separated from the upper one 



