96 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
reddish-yellow basal triangle on each side, fourth broadly reddish 
yellow laterally ; abdomen with dense yellowish pollen forming a some- 
what tessellated pattern but not, however, obscuring the background. 
Holotype—Female, Itaquaquecetuba, Sao Paulo, Brazil, June 1, 
U.S.N.M. No. 57287. 
The description is based on the type, the only specimen known to me. 
It is in good condition except that one antenna and the artista of the 
other one are missing, and the legs, except one hind one, are broken off 
beyond the trochanters. Townsend described the arista as “long as 
antenna and micro pubescent” and the legs as “fulvous, tarsi dark.” 
2. LESKIELLA, new genus 
Front moderately convex; width of frontalia at middle subequal to 
or a little less than that of a parafrontal; vertex one-third head width 
in female, two-sevenths in male; epistoma slightly warped; parafacial 
twice as wide at base of antennae as at narrowest point; cheek one- 
fourth to one-third eye height. Haustellum 0.60 to 0.75 head height, 
straight, cylindrical, and approximately of equal diameter throughout, 
none of its setulae arising from pigmented pores; labella small; palpus 
bowed, subequal to third antennal segment in length in the female but 
shorter in the male, with one or two outstanding setulae ventrally at 
about three-fourths its length. Third antennal segment 3 to 3.5 as 
long as second; aristal hairs approximately equal in length to basal 
diameter of arista. Lateral postscutellar plates bare. Tarsi some- 
what longer than tibiae; claws in female short, in male longer than 
fourth or fifth tarsal segment. Wing with cell R; narrowly open; vein 
R, with setulae approximately evenly spaced and extending not quite 
to tip, usually one or two of the apical setulae missing. 
Chaetotaxy.—Postocellars not decussate; outer verticals clearly dif- 
ferentiated, more prominent in the female, one-half to one-third length 
of inner verticals; ocellars moderately strong, two proclinate and one 
small reclinate frontoorbitals in the female, no proclinate and one small 
reclinate frontoorbital in the male; six to eight frontals, the anterior 
two small, the first distinctly below, the second slightly below and 
almost level with, the antennal bases, the first sometimes duplicated. 
Presutural acrosticals absent or one or two pairs moderately developed 
and distant from suture; 2 presutural dorsocentrals; hind preintraalar 
wanting; two, rarely, three, humerals; two postalars; usually three 
lateroscutellars, the intermediate pair set close to the hind one, usually 
weak but distinctly stronger than surrounding hairs, the hind pair 
convergent but not decussate; one discoscutellar; no apicoscutellars; 
one moderately small pteropleural; four or five hypopleurals. No 
median marginals on first and second abdominal segments. 
Genotype —Leskiella brevirostris, new species. 
