100 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
vitta about as wide as the diameter of a trichopore of a dorsocentral 
bristle; mesonotum except laterally, upper part of humerus, and 
scutellum black setulose, thorax otherwise with softer yellow hairs. 
Squamae and halteres yellow. Legs mainly yellow; tarsi, however, 
either entirely black or infuscated apically and appearing black under 
low magnification by virtue of the density of their black setulae; 
coxae whitish pollinose, legs otherwise without pollen; coxae mainly 
and posteroventral surface of middle and hind femora on basal part 
yellowish pilose, legs otherwise with black setulae. 
Abdomen yellow, usually orange-tinged or infuscated on apical . 
seoments, and more or less marked with black, blackish, or brown; 
third and fourth tergites white-pollinose at base ventrally and later- 
ally, this pollen showing from dorsal aspect at least as small posterior 
triangles laterally on the segments; ventral portions of first tergite 
with soft yellow pile, abdomen otherwise with rather dense black 
setulae. 
KEY TO THE SPECIES OF LESKIOMIMA 
1. Haustellum 1 to 1.25 times head height; one pair of discoscutellars® and 
ATCO er FOL COS CUNEO LS a se cc ae ee al 2 
Haustellum 1.5 times head height; no discoscutellars; one pair of small 
parallel ‘apreoscutellars. 2 Ses See Tee es eee ete australis Townsend 
2. Black ground color of thorax extended to include sides of mesonotum and 
base of scutellum; pollen of head and thorax entirely whitish to cinereous 
cinerea, new species 
Sides of mesonotum and entire scutellum yellow in ground color; parafrontals 
and mesonotum with yellow pollen_-___-------__-_-- tenera (Wiedemann) 
LESKIOMIMA AUSTRALIS Townsend 
Leskiomima australis TowNsEND, Rev. Chilena Hist. Nat., vol. 32, p. 368, 1928; 
Manual of myiology, pt. 9, p. 225, 1939. : 
Male.—Length, 6 mm. Lateral occipital plates blackish on upper 
third; pollen of head mainly whitish, becoming yellow on parafron- 
tals, upper third of occipital orbits and lateral occipital plates, area 
surrounding cheek groove, and narrow inner margin of parafacial. 
Infuscated area of third antennal segment reaching almost to base 
dorsally and to basal third ventrally; first segment of arista yellow, 
second and base of third infuscated, the third otherwise yellow on its 
basal third to half, beyond that black; hairs of arista concolorous. 
Haustellum about 1.5 times head height. Palpus below with one 
longer seta near apex and one at beginning of apical fourth. Five 
frontals. 
Thorax with humeri, scutellum, sides of mesonotum, propleura, up- 
per parts of mesopleura, and other pleural areas of varying extent 
5In rare instances the discoscutellars are set back rather far and may be confused with 
apicoscutellars. 
