68 THE BLOWFLIES OF NortH AMERICA 
posteriorly, and consisting of five or six bristles; parafrontale 
with a few dark setae outside the frontal row of bristles; frontale 
with nearly parallel margins, red orange anteriorly, darker 
posteriorly, and wider than parafrontale; third antennal seg- 
ment 3.4 times as long as second; parafaciale 1.6 in width 
opposite lunule; vibrissae set 4.4 apart; palpus 4.0 in length, 
orange. Wing (pl. 8, A) with costal sections 2 to 6 in the 
proportion 110:90:150:80:14. Otherwise like male except for 
normal sexual differences. 
Length. 9-10 mm. 
Originally described from three males and two females col- 
lected from February 23-28 to March 16, by Pablo Schild. 
(A. L. Melander’s collection. ) 
P. ngrifrons (Bigot) has the eyes in the male contiguous for 
a short distance rather than distinctly separated; the costal 
margin in both sexes is heavily infuseated beyond the second 
costal section, and there are three dark stripes on the dorsum 
of the thorax separating four pollinose stripes. This species is 
Neotropical and specimens are at hand from Brazil, Ecuador, 
and Peru. 
HUASCAROMUSCA TOWNSEND 
Huascaromusca Townsend, Insecutor Inscitiae Menstruus 6:155, 
1918. Genotype. (Huascaromusca cruciata Townsend) = 
Somomyia xanthorrhina Bigot. (Monobasic.) 
Male and female. Head (pl. 1, A) length at antenna and at 
vibrissa equal or the length at antenna only slightly greater 
than length at vibrissa; front in female usually with parallel 
margins, narrow in male; clypeus about as long as wide; para- 
faciale usually narrowed above. Thorax with posthumeral and 
preacrostichal bristles. Wing long but not particularly nar- 
rowed as in Mesembrinella and Promesembrinella. 
Huascaromusca abaca, new species 
A yellowish to blackish-brown species with hyaline wings, the 
head, appendages, and base of abdomen yellow. This species is 
usually determined under the name bicolor, to which species 
it is closely related. The two are almost identical in superficial 
appearance. « 
Male. As in bicolor except head with small proclinate fronto- 
orbital bristles which are nearly opposite the anterior ocellus, 
no weak accessory ocellar bristles; width of front at narrowest 
0.07 to 0.08 of full head width; vibrissa only slightly above the 
oral margin. 
