AMERICAN DIPTEEA. 209 



Twenty-five specimens. Moscow, Idaho. 



Apicis, nig gp and dividiia are quite similar at first sight. More- 

 over, they constitute a group having the hypopygium cleft. 



Di'apeti!^ latipeniiifsi sp. nov. (Figs. 11, 19). 

 Length 1.5-2 mm. — Black, shining; legs yellowish brown. Front moderately 

 narrow; vertex and occiput shining, beset with dusky hairs. Eyes narrowly 

 separated below auteunse. Proboscis black, pointed, palpi piceous, with grayish 

 hairs, broad, mouth-parts very small. Antennae short, piceous; third joint equal 

 to second, flattened above, arista long. Thorax large, shining, black, notum with 

 sparse dusky hairs, no macrochsetEe ; pleurse very shining, with no hairs nor 

 pollen ; scutellum with two apical bristles; halteres piceous. Abdomen fuscous 

 to black, hairy, segments regular, in the male segments five and six have a 

 slightly whitish cast, in the female segments four and five have whitish borders 

 sometimes; hypopygium not wider than abdomen; anal segments of female 

 black. Front coxse and femora luteous, middle and posterior coxaj and trochan- 

 ters piceous, remainder of legs sordid yellow, tarsal joints not darker apically, 

 hind legs as far as second tarsal joint sometimes more or less dark; hind tibiae 

 with a very small spur on posterior side and a few yellowish hairs near tip. 

 Wings hyaline, broad, anal angle full, second vein terminates nearer first than 

 third, marginal cell at tip of first vein three times the width of submarginal at 

 that point, second basal cell broad, about twice as long as first, third and fourth 

 longitudinals diverging and then subparallel, first posterior cell not narrow in 

 the wing margin ; veins not broad, though piceous. 



Two males and three females ; Lawrence, Kansas. One male ; 

 Milwaukee, Wis. 



Drapetis apinis Williston. 

 Trans. Ent. Soc. Lond., 1896, iii, p. 442. 



Antennae brown, third joint small, onion-shaped. Front black, not shining. 

 Eyes contiguous on face. Thorax black, mesonotum moderately shining, scutel- 

 lum with two bristles; abdomen nearly opaque black. Legs brown, front coxae, 

 basal part of all the femora, hind tibiae in part, and the proximal part of the four 

 posterior tarsi yellowish. Front femora thickened on the proximal portion, the 

 under border straight; middle femora less thickened, hind femora rather slen- 

 der. Wings nearly uniformly tinged with brown; second and third sections of 

 the costa subequal ; third and fourth veins nearly parallel, the third terminating 

 at the extreme tip ; penultimate section of fourth vein about twice the length of 

 the posterior cross-vein. Palpi, proboscis and halteres brown. Front and hind 

 tibiae without spurs. Length 2 mm. 



St. Vincent, West Indies. 



In addition to the characters given in the specific diagnosis, the 

 following will help to distinguish this species from dividua : 



Costa thickened between first and second veins; marginal cells at 

 tip of first vein one-half the width of the submarginal cell at that 



TRANS. AM. ENT. SOC, XXVIII. (27) JULY, 1902 



