138 
Psyche 
[October 
14. Hypopygium greatly enlarged, wider than abdomen, its 
valves nearly as broad as long, with basal swelling below; 
abdomen largely polished .15. 
Hypopygium not wider than abdomen, its valves about 
twice as long as wide, with strong tooth on inner edge 
toward base; abdomen dull. (Wash.) .mon^tco^a, n. sp. 
15. Thorax narrowly vittate; anterior crossvein beyond middle 
of discal cell. (Cal., Or.) bivittatus ~Loew 
A narrow median dark line extending down the center 
paler stripe between the broad principal vittse; anterior 
crossvein before middle of discal cell. (Id., Wash.) 
aldrichii, n. sp. 
Lasiopogon actius, sp. nov. 
Male . — Length 7-9 mm. Front and upper occiput dusted 
with brownish, face with white, hairs of upper part of head and 
of antennae whitish with yellowish tinge; style three-fifths as 
long as third antennal joint. Notum rather closely pollinose, 
changing in color according to incidence of light, dorsocentral 
vittae distinct, dark brown, curved, the broad undivided middle 
stripe yellowish brown, sides fulvous brown, connecting with 
the dorsocentral vittae behind the gray humeri; scutellum, 
postalar callosities and a vitta extending forward from each 
callosity cinereous; hairs and bristles of mesonotal disk and of 
scutellar margin yellowish, lateral bristles stout and black; 
pleurae cinereous, the mesopleura brownish, hairs of meso-, 
sterno- and hypopleurae pale. Abdomen quite dull, first segment 
gray, 2-7 segments marked with paired basal semicircular brown 
spots and apical gray band, vestiture abundant and whitish; 
hypopygium slightly wider than abdomen, dorsal piece centrally 
polished, not emarginate, fringe fulvous becoming almost golden 
laterally, valves lightly dusted and with abundant yellowish 
hair, curved, over twice as long as wide and parallel-sided as 
seen obliquely from above, their apex rounded and furnished 
with short blackish hairs, base below strongly widening and then 
narrowed at attachment; venter cinereous, the coating thinner 
posteriorly. Legs gray dusted, hairs and femoral bristles whitish, 
