46 DIPTERA OP NORTH AMERICA. [PART II 



the tegulae yellowish. Wings grayish-hyaline ; the fourth longb 

 tudinal vein not broken. 



Male. Lamellae of the hypopygium whitish, of moderate size and 

 of a rather oval shape ; on the upper and apical margin they are 

 narrowly bordered with black ; on the latter very much jagged 

 and fringed with black bristles. Hind femora very closely ciliated 

 with yellow hairs on the middle of the under side. Fore tarsi 

 about H times the length of the tibia? ; their three first joints slender 

 and stalk-like, the first as long as the second and third taken 

 together ; the second about 1^ times the length of the third ; the 

 fourth joint somewhat more than half as long as the third and 

 somewhat broader ; upon the whole under side and upon the upper 

 side, excepting the tip, whitish ; the fifth joint somewhat longer 

 than the third and fourth taken together, flattened, extremely 

 broad, black with a silk-like reflection ; upon its outside this reflec- 

 tion takes a handsome silvery hue when viewed in a very ob- 

 lique direction. Hind tibia? considerably thickened, the greatest 

 thickness somewhat before the middle ; the anterior half of their 

 hind side without pubescence. The costa near the tip of the first 

 longitudinal vein with a rather elongated swelling. 



Hab. West Point, X. Y. ; Illinois. (Osten-Sacken.) Con- 

 necticut. (Xorton.) White Mountains, N. H. (Osten-Sacken.) 



IS. D. eudactylus Loew. % and 9- — Aeneo-viridis, pedibus flavis, 

 coxis anticis tibiisque posticis totis concoloribus, antennis tarsisque 

 posticis nigris, borum basi flava, ciliis oculorum inferioribus tegula- 

 rurnque ciliis flavicantibus, maris duobus ultirnis tarsoruni anticorum 

 articulis dilatatis et femoribus posticis ciliatis. 



Metallic-green ; fore coxae and feet yellow ; hind tibiae not darker at the 

 tip ; tlie black hind tarsi with yellow root ; cilia of the inferior orbit 

 and of the tegulse yellowish; the two last joints of the fore tarsi of the 

 'J, enlarged and the hind femora ciliated. Long. corp. 0.26. Long, 

 al. 0.25. 



Syn. Dolichopus eudactylus Loew, Keue Beitr. VIII, 16, 11. 



Metallic-green, bright. Face of the g narrow, ochre-yellow- 

 ish ; the face of the 9 broader and yellowish-white. Antenna? 

 entirely black, the lower corner of the first joint hardly somewhat 

 lighter ; third joint short. Front green, or bluish-green, bright. 

 Cilia of the inferior orbit yellowish. The more bronze-colored 

 middle line of t^e thorax usually but little distinct ; on each side 



