116 
repeated by Brauer and Bergenstamm. 1 Two species occur in our 
fauna, and in each there are three postsntural and two or thredsterno- 
pleural inacrochsetse : 
Tibia 1 and antenme, except sometimes apex of second joint, black; 
apical cell closed, frontal bristles descending beneath base of 
second antenna! joint; length, (> to 7 mm. Beverly, Mass.; Tif 
ton, Ga. ; Georgetown, Fla.; Mobile. Ala.; Agricultural College, 
Miss.; St. Louis, Mo., and Los Angeles County, Cal. (Proc. 
Acad. Nat. Sci. Philadelphia, p. .*>1 1 ; Sept., 1895.) . . dentata Coq. 
Tibia' and second antennal joint yellow, apical cell open, frontal 
bristles not descending to base of second antennal joint; black, 
the palpi, apex of proboscis, iirst two joints of antenna 1 , tro- 
chanters, apices of femora, and whole of tibiie yellow; front of 
female as broad as either eye, the sides brownish gray pollinose, 
two pairs of orbital bristles, face white pollinose; antenna' 
reaching slightly below middle of face, the third joint one and 
one half times as long as 1 1 i * - second, arista thickened on the 
basal fourth, vibrissa' inserted three-fourths the length of the 
third antennal joint above the oral margin, two or three bristles 
above each, cheeks one-fifth as broad as the eye height; thorax 
gray pollinose, marked with four black vittae; abdomen gray 
pollinose, a black dot at base of each hair, the hairs depressed, 
a marginal pair of macrochaetaB on the second segment and a 
marginal row on the third and fourth; wings hyaline, third vein 
bearing one or two bristles near the base, the others bare, apical 
crossvein nearly straight, bend of fourth vein forming an obtuse 
angle; calypteres whitish: length, 4 mm. Santa Cruz Moun- 
tains, California. A single female specimen, collected by A. 
Koebele. Type Xo. 3620, U. 8. National Museum, .tibialis n. sp. 
Genus PSEUDOCH^TA Coq. 
rseitdoehuia Coquillett, Proc. Acad. Nat. Sci. Philadelphia, p. 309; Sept., 1895. 
Our species have two or three pairs of backwardly curving macro- 
cha-ta' on the sides of the front in both sexes, and with two pairs of 
forwardly directed orbital bristles in the female, wanting in the male; 
four postsntural macroclneta': 
With only two sternopleural macrochretse ; black, including the 
palpi; third joint of antenme in the male five, in the female 
three, times as long as the second; length, 5 to 7 nun. From the 
type specimen. Northern Illinois; Tifton, Ga.; Charlotte Har- 
bor, Florida, and Santa Barbara County, Cal. (Proc. Acad. Xat. 
Sci. Phila., p. 310; Sept., 1895.) argentifrons Coq. 
With four sternopleural macrochreta* ; black, the apex of scutellum, 
sides of second segment of abdomen, hind corners of the first and 
front corners of the third, yellow; front of female scarcely as wide 
as either eye, the sides and face silvery pollinose, frontal vitta 
Zweif. des Kais. Museum zu Wieu, VI, p. 226; 1893. 
