FLIES OF THE TRIBE LESKIINI—JAMES 111 
stigmatal area more closely set than elsewhere. Squamae and halteres 
yellow. 
Abdomen with a median black vitta extending from near base of 
first to apex of fourth segment, very narrowly interrupted at anterior 
margins of segments, on third segment broadening into a transverse 
band that occupies about apical third to half of dorsal surface of 
tergite; sides of segments 2 and 4 with black spots posteriorly which 
on segment 2 and perhaps also on segment 4 may be united with the 
median vitta. Most of hairs of segment 1 ventrally, and some also on 
segment 2 ventrally, yellowish, those of rest of abdomen black. 
Types.—Male, Itaquaquecetuba, Sao Paulo, Brazil, October 26; 
female, Itaquaquecetuba, November 20. ‘The male is here designated 
the lectotype, U.S.N.M. No. 57294. 
The description is based on the types, on a female, Itaquaquecetuba, 
Sao Paulo, Brazil, May 25 (C. H. T. Townsend), and on a male, 
Villarica, Paraguay, November 1936 (F. Schade). 
GENEA GRACILIS, new species 
Length, 5 to 7 mm. Head in ground color yellow except lateral 
occipital plates, which are blackish on approximately upper half; 
pollen brownish on frontalia, golden on parafrontals, pale yellowish 
on face and occiput. Each parafrontal with a few scattered fine 
black hairs; occiput largely with fine yellow hair but with some 
coarser black hair above, more in the female than in the male. Outer 
verticals not differentiated in either sex. Antenna yellow, third seg- 
ment infuscated except on basal third ventrally and inwardly; third 
segment rather slender; arista yellow on first two segments and thick- 
ened part of third, except its base, third otherwise brown; hairs 
unusually long for this genus, being about three times maximum 
diameter of arista. Haustellum slender, cylindrical, constricted on 
apical half, very slightly bowed backward, 1.3 to 1.5 head height; 
color yellow, brownish to blackish on apical half. Palpus about 1.3 
length of third antennal segment; setulae black, mostly short, 1 out- 
standing preapical and 1 outstanding median one on ventral surface. 
Female with 2 reclinate frontoorbitals. 
Ground color of thorax chiefly black, that of notopleura, humeri, 
scutellum, and propleura, however, yellow; pollen of mesonotum, 
scutellum, and upper parts of pleura yellow, that of rest of pleura 
whitish; inner vitta of mesonotum about as broad as diameter of 
trichopore of a dorsocentral bristle. Hairs of mesonotum, scutellum, 
and upper parts of humeri coarse, black, those of lower parts of humeri 
and pleura rather fine, yellowish. Hind presutural acrostical much 
stronger than fore one. Legs mainly yellow; hind femur brownish 
near apex; hind tibia blackish; all tarsi black; coxae whitish pollinose, 
legs otherwise without pollen; hairs of coxae and a few near base on 
