282 Mr. C. H. T. Townsend on Diptera 
I suspect that 7. wmbra, Walker, from Venezuela (List, 
p- 698), is another variety of histrio. It seems very pro- 
bable from the description of the brown bloom on abdomen, 
becoming tawny on last segment, with a median vitta 
separating it. ‘Lhe specimen described was a female. 
PENNAPODA, subgen. n. 
Differs from normal forms of T'richopoda in the abdomen 
being nearly the same shape in both sexes, subcylindrical, 
rounded at tip, narrowed a little at base, not flattened-sub- 
quadrate in male. Hind tibia much less strongly ciliate, 
with weak cilia on apical half; claws of female very short, 
those of male elongate but black. Wings hyaline on more 
than inner half. Apical cell closed in margin. Characters 
of the vibrisse and frontal bristles same as in Trichopoda, 
but the bristles somewhat stouter. It has a distinct facies. 
Type 7’. phasiana, sp. n. 
The forms of Trich. histrio connect this subgenus with 
Trichopoda proper. ‘They are intermediate between the two, 
very much approaching Pennapoda in certain characters, but 
yet more nearly related to Z’richopoda in general facies. 
42. Trichopoda phasiana, sp. n.° 
Ten males and six females. San Rafael, both sexes taken 
from June 30 to July 13. All on flowers of the Cordia sp. 
Length of male 7 to 8 millim., of female 6 to 7 millim. 
Male.—F ace silvery, with a golden shade; orbits narrow, 
distinctly golden, extending nearly to vertex. Rest of front 
taken up with the very wide soft black frontal vitta. An- 
tenne blackish or brown, second joint below and base of third 
more or less yellowish, third joint not twice as long as 
second. Palpiyellowish. Mesonotum golden-pollinose, with 
three wide black vitte, interrupted at suture, and more or less 
joined behind suture, sometimes in one transverse piece of 
black irregularly and widely bordered behind by golden. 
Sometimes the middle black vitta in front of suture is split 
from behind by a line of golden. Scutellum black, silvery 
pollinose except at base. Pleure silvery pollinose. Abdo- 
men black, with a large oval pale yellow spot on second and 
third segments on each side, extending from near anterior 
margin of second to within about same distance (one fourth 
to one sixth length of segment) from posterior margin of 
third, notched on inner side, more or less obliquely extended 
posteriorly, the median black between the two spots being 
much wider on third segment than on second. Fourth and 
