THE DIPTEROUS GENUS DOLICHOPUS IN NOPtTH AMERICA. 239 



their tibiae, yellow, darkened toward their tips, last two joints, 

 black; first joint about as long as second and third taken together, 

 fourth and fifth of about equal length. Middle tarsi one and a 

 fourth times as long as their tibiae, black from the tip of the first 

 joint, still the second paler at base. Hind tarsi one and a third times 

 as long as their tibiae, blackened from the middle of the first joint, 

 which has three large bristles on upper surface. 



Wings (fig. 179) short, grayish; costa with a very small knot-like 

 enlargement at tip of first vein; last section of fourth vein bent at 

 its basal third ; hind margin of wing scarcely indented at tip of fifth 

 vein, rather evenly rounded ; anal angle rounded but rather prominent. 



Female. — The type female has the face wide, almost silvery white, 

 a little tinged with yellow on upper portion; third antennal joint a 

 little longer and more pointed than in the male ; wings a littler wider, 

 bend of fourth vein a little farther from the cross-vein, anal angle a 

 little more prominent, and third vein almost straight, in the male 

 the third vein is bent backward at tip a little; costa without an 

 enlargement. 



Redescribed from the type material in the collection of J. M. 

 Aldrich, 3 males and 1 female, 2 males and the female were taken at 

 Kjioxville, Tennessee, May 17, 1891 (H. E. Summers), the other 

 male was taken at Lawrence, Kansas, by J. M. Aldrich; and 1 male 

 from the collection of J. S. Hine taken by Bridwell, at Baldwin, 

 Kansas, June. 



The point of insertion of the hypopygial lamellae is rather unusual, 

 as is also the long first joint of the arista. 



No. 175. DOLICHOPUS CAROLINENSIS, new speies. 



Male. — Length 5.5 mm. Face wide, narrowed below, almost 

 ocher yellow. Front dark shining green. First two antennal joints 

 yellow, second small; third joint black, broad, somewhat orbicular, 

 still pointed at tip. Lower orbital cilia yellow, those of upper half 

 black. 



Thorax green; dorsum with the sides and a median line bronze- 

 brown, a little dulled with gray pollen; pleurae more blackish with 

 gray pollen. Abdomen green with wide black incisures; the white 

 pollen on its sides abundant and extending upon the dorsmn. Hypo- 

 pygimn black; its lamellae (fig. 175a) of moderate size, somewhat 

 oval, about one and a half times as long as wide, whitish with narrow 

 black border on upper and apical margins, jagged and bristly at apex, 

 fringed above with rather long black hairs. 



Fore coxae yellow, with a small black spot at base on outer side, 

 anterior surface with silvery pollen and little black hairs. Middle and 

 hind coxae black with yellow tips. Femora and tibiae yellow. 

 Middle and hind femora each with one preapical bristle, the latter 



