THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 205 



of the first joint, which is without a bristle above and is nearly as long 

 as the three succeding joints taken together; fifth joint about three 

 fourths as long as fourth. Hind tarsi wholly black. Middle and hind 

 tibiae each with one large bristle below near apical fourth. Calyp- 

 ters and halteres yellow, the former with black cilia. 



Wings grayish ; costa with a slight elongated enlargement at tip of 

 first vein ; last section of fourth vein slightly bent at basal third; third 

 and fourth veins a little convergent toward their tips; anal angle 

 rather prominent but rounded. 



Described from 6 males taken at Ungava Bay, Labrador, July 22- 

 29, by L. M. Turner. 



Type.—Male, Cat. No. 23037, U.S.N.M. 



While this species has a striking resemblance to disdfer Stannius, 

 still it differs in many points. The face is wider; the arista is placed 

 much nearer the t^p of third antennal joint; the hind femora have no 

 yellow hairs on the lower edge of their sides; the first two joints of 

 fore tarsi are black and quite thick; the tips of fore tibiae are slightly 

 brownish; and the wings are not narrowed at their roots. 



No. 146. DOLICHOPUS ANGUSTATUS Aldrich. 



DoUchopus angustatus Aldrich, Kansas Univ. Quart., vol. 2, p. 15. 



The following is a copy of Doctor Aldrich's description. I havo 

 not seen the species, but Professor Melander has it in his collection. 

 The drawings are from this specimen, which was taken at Woods 

 Hole, Massachusetts. 



Male. Antennae black, first joint in part yellow, third joint very long and wide 

 with a sharp point; cilia of inferior orbit pale, of tegulae black, last joint of fore tarsus 

 enlarged. 



Face grayish yellow, front shining violet; first joint of antennae slender, arista 

 inserted beyond the center of the third joint. Thorax bright bluish green, with a 

 bronze stripe each side above the root of the wing, and a very narrow one in the middle ; 

 pleurae dark green, light dusted. Abdomen somewhat bluish green, more bronze 

 before the incisures. Hypopygium black, the lamellae whitish, rounded with a 

 black margin, jagged near the apex, and with curved black bristles. Fore coxae 

 yellow, with small black hairs in front near the inner side, and some white dust. 

 Middle and hind coxae yellow, the former considerably, the latter slightly, brownish 

 toward the base. Femora and tibiae yellow, the hind femora not ciliated. Fore 

 tarsi [fig. 146a] nearly twice as long as the tibiae, not very slender, the first four joints 

 plain, yellow; fifth joint as long as the third, black, flattened; fourth somewhat flat- 

 tened, but not otherwise modified; middle tarsi blackened from the tip of the first joint; 

 hind tarsi wholly iafuscated, still at the base not decidedly black; the color suggests, 

 that the specimen may be immature. Wings [fig. 146] subhyaline, rounded at apex, 

 the widest part beyond the middle, narrowed toward the base. Beyond the double 

 flexure the fourth vein runs in a gentle curve parallel with the third vein, ending 

 barely before the apex. Length 5 mm.; of wing 4.2 mm. 



One male, Massachusetts (U. K.). 

 Type. — In University of Kansas. 

 187329—21 14 



