54 . Psyche [March 
brown lower orbitals, two of upper orbitals; the vertical 
and ocellar bristles are well developed. The antennae do not 
quite reach the oral margin; the third joint is about twice 
as long as the second ; the cheeks, face and mouthparts are 
proportioned much as in T. obscuriventris. 
The thorax is probably black, overlaid with greyish pollen 
in all of my specimens. The bristles are well developed, yel- 
low, arranged much as in the genotype, T. obscuriventris. 
The scutellum is yellowish, with both pairs of bristles well 
developed ; the legs are yellow, with light colored hairs and 
spines. 
The wing pattern is shown in figure 4. The ground color 
is a uniform dark brown, with various hyaline indentations 
and spots. The costal cell is mostly hyaline, with some 
brown lines ; the stigmal cell includes a yellowish spot which 
occupies about half of its area. There are two triangular 
hyaline indentations in the marginal cell, the tips of which 
extend over the second longitudinal vein, almost reaching 
the third vein. A small hyaline spot is sometimes present 
just below the tip of the second vein. The spots in the first 
hind marginal cell are variable in number and position, and 
may be different on the two wings of one specimen. Most 
commonly three are present, sometimes only the two basal 
spots are present ; sometimes the apical spot splits into two, 
as in the figure, or even three smaller spots. The first basal 
cell includes a single round hyaline spot. In the second hind 
marginal cell there are three hyaline indentations : the dis- ! 
tal one is small, round, and may be absent ; the two proximal 
ones are elongate, always present. The third hind marginal 
cell includes two elongate hyaline areas which reach the 
fifth vein above; there is a small round spot in the discal 
cell, usually about midway between these two marginal in- 
