20 
Psyche 
[Mar. 
Dr. G. F. Knowlton collected these specimens from a 
light trap operated near a small pond fed from an artesian 
well. Callao is located just southwest of the Great Salt 
Lake Desert. 
Lepidostoma veleda n. sp. 
This species belongs to the Pluvial group and bears 
closest resemblance to ormea Ross and rayneri Ross. It 
can be distinguished from these species by the lateral lobe 
of the tenth tergite which bears a dorsal and ventral spine 
opposite one another and the short truncate condition of 
the tenth tergite when seen from the dorsal aspect. 
Male. — Length 7.5-8 mm. Basal segment of antenna 
long, almost equal to dorsal width of head, a scattering of 
black scales over most of segment, especially dense along 
mesal surface. Third segment of maxillary palpus with 
a very dense brush of long black scales. Costal cells of 
forewing reflexed nearly to media, resultant pocket lined 
with dense brown setae and black scales which are espe- 
cially heavy along margin, in a few individuals a scatter- 
ing of black scales will be found extending beyond mar- 
gin of pocket. 
Genitalia as in fig. 5. Ninth segment annular, tergite 
produced into a triangular projection. Tenth tergite di- 
vided into a pair of divergent lateral lobes, separated on 
meson to base, from dorsal aspect, fig. 5A, short, truncate, 
prominent acute dorsal spine near center of margin ; from 
lateral aspect, fig. 5, dorsal spine directed dorsad, in a 
straight line with the ventral spine which is curved 
slightly cephalad. Claspers long, narrow, convergent 
from ventral view, at base the short digitate process is 
gradually curved caudad, apex sub-acute with small acute 
caudad directed process near apex on mesal surface. 
MMeagus long, tubular, base bulbous, apex of main por- 
tion submembranous and with a pair of long, slender, 
acute tubular processes along dorsal surface. 
Female. — Length 8-8.5 mm. Similar to male except for 
sexual dimorphic characters. Ninth and tenth tergites, 
fig. 5B, relatively short ; ninth tergite becomes a darkened 
sub-acute angulation at apex, the tenth tergite lobes di- 
vided and broadly rounded at apex. Spermatheca, fig. 
