1930 ] 
Wasp-waisted Flies 
179 
sendi. Where the middle of the second segment of the ab- 
domen in townsendi is uniformly red, it is red with a black 
median stripe in reinhardi and the median posterior sec- 
tion is also partially covered with punctate pollen. 
Length, 14.5 mm. including antennae. Female. Vertex 
yellow, tinged with reddish on every side; front from 
posterior ocelli to a sharp line just before antennifer red- 
dish, continued narrowly along the median line to antennal 
prominence and with radiating rugosities in the middle 
anterior to the ocelli. Antennifer reddish, and this color- 
ation continued from its base as a broad stripe down the 
face, a narrow one laterally to eye margins, and a stripe 
on either side of the face. A small black spot on either side 
of the antennifer above. Lower front and ground color of 
face yellow. Cheeks red ; a black stripe proceeds obliquely 
from the eye margins two-thirds of the distance to the oral 
margin. The median red stripe of the face with a broad 
stripe of microscopic pubescence, thus leaving three 
slender, shining red stripes. Antennifer half the length of 
first joint of antennae. First joint a little shorter than 
length of second and third combined and a little longer 
than the second joint alone. Style short. Entire antennae 
reddish brown. 
Thorax entirely reddish with a short black stripe on 
either side of the dorsum posteriorly and a shorter, trans- 
verse, black dash along the inner ends of the suture, a yel- 
low spot on the humeri, just before the base of wing on 
mesopleurae, sternopleurae, and on the metapleurae. Scut- 
ellum yellow. Halteres reddish. Squamae pale brown. , 
Abdomen entirely dark brownish red save for a median 
black stripe on the posterior third of the second segment 
and a black tinge on the posterior corners and sides of the 
same segment. Pollen or pubescence of segments, especi- 
ally punctate, and together with the lunulate markings 
quite conspicuous, and extending on to basal half of second 
segment. Posterior borders of second, third, and fourth 
segments shining reddish brown. Venter extensively shin- 
ing black, on the sides reddish. Legs reddish, the sides of 
the hind femora more deeply and the bases of the tibiae 
more yellow. Wings infuscated along anterior margin to 
tip of wing, the brown coloration reaching completely to 
