56 DIPTERA OF NORTH AMERICA. [PART II. 



Metallic green, middle line and lateral stripes of the thorax brassy yellow ; 

 face yellowish-white ; antenna? red ; cilia of the inferior orbit whitish, 

 cilia of the tegulse black ; feet yellow ; tip of the fore tarsi of the % en- 

 larged ; wings towards the base not narrowed ; fourth longitudinal vein 

 broken. Long. corp. 0.25—0.26. Long. al. 0.24. 



Syn. Dolichopus cupreus Say, Journ. Ac. Philad. Ill, 86, 9. 



Dolichopus cuprinus Wiedemann, Zwein. II, 230, 1. — Walker, List III, 

 660.— Loew, Neue Beitr. VIII, 20, 19. 



Metallic green, shining. Face whitish, with a more or less yel- 

 lowish tinge, particularly that of the J", which is considerably 

 narrower than that of the ? . Antennae yellowish-red, the apical 

 half of the third joint often infuscated. Arista with short but 

 distinct pubescence. Front shining, bluish-green. Cilia of the 

 inferior orbit whitish-yellow. Upper side of the thorax green, 

 often bluish-green, seldom blue, with a conspicuous yellow brass- 

 colored, sometimes copper-colored middle line and with similar 

 lateral stripes. Abdomen usually more bronze-green or coppery. 

 Coxae and feet pale yellowish ; fore coxae only on the inner margin 

 of their anterior side with sparse minute black hairs, which are 

 more distinct in the ? than in the <g ; middle coxae upon the 

 greater part of their outside, blackish. Hind femora with a bris- 

 tle before the tip. Fore tarsi from about the middle of the third, 

 middle and hind ones from the tip of the first joint, blackened. 

 Cilia of the tegulae black. Wings tinged with gray, towards the 

 fore margin more grayish-brown, not more narrowed than usual 

 towards the base; the fourth longitudinal vein broken, so that its 

 inferior angle is a sharp right one and the superior is rounded ; 

 the former is supplied with a short stump of a vein. 



Male. Lamellae of the hypopygium of moderate size and of 

 elongated-ovate form, white, narrowly bordered with black on the 

 upper and apical margin ; the latter jagged and beset with black 

 bristles. Hind femora upon the second half of their under side 

 sparsely ciliated with very long yellowish hairs. Hind tibiae not 

 thickened, upon their hind side with a glabrous stripe extending 

 beyond the middle. Fore tarsi not one and a half times the length 

 of the tibiae, two first joints stalk-like ; first joint nearly one and a 

 half times the length of the second ; three last joints slightly flat- 

 tened, third joint upon its upper side very densely fringed with 

 longer, the fourth with somewhat shorter black hairs ; the three 



