210 Psyche [Vol. 93 
found, we consider them to represent a distinct and previously 
unrecognized species. 
Adult. Similar to O. unicolor in general body characters and 
venation, but distinguished by characters of the male and female 
genitalia as outlined in the key to species. Colour more similar to 
yellowish variants of O. unicolor than to the darker brown speci- 
mens; dark markings on the fore wings around the corneous spot in 
cell R4 and around the thyridium variable. Length of the fore wing: 
$ 18-20 mm; $ 20-21 mm. 
Male genitalia (Fig. 11). Segment X with external branches in 
lateral aspect broad at the base, usually somewhat tapered toward 
the apex, orientation mainly in a vertical plane; internal branches in 
dorsal aspect with a double-edged median crest; subanal plate in 
dorsal aspect extending beyond the periphery of the internal 
branches; inferior branch of X prominent as a flattened tongue 
between the external branch and the subanal plate. Phallus with 
parameres entirely separate from the aedeagus except at the basal 
articulation, spines fewer than in O. unicolor and bent, proximal 
spines cusped with small accessory points, apex of each paramere a 
prominent membranous lobe. 
Female genitalia (Fig. 13). Segment IX with tergum consisting 
of enlarged lateral lobes as in O. unicolor, but the lobes concave 
ventrolaterally; sternum of IX somewhat folded and less sclerotized 
than in O. unicolor. Segment X in ventral aspect shorter and 
broader than in O. unicolor, and more widely divided dorsally, 
prominent basal shoulder lacking. Vulval lobe in ventral aspect with 
median portion wider and more pointed than is usually so in O. 
unicolor. 
Larva. Unknown for this species, and consequently Onocos- 
moecus larvae from the general range of O. sequoiae cannot yet be 
assigned to species. 
Types. Holotype male (pinned): CALIFORNIA, Tulare Co., 
Salmon Cr., trib. Kern R., Horsemeadow Campground, Sequoia 
National Forest, approx. 7000 ft., 10 mi. NE Kernville, 7 August 
1985, black light trap, R. W. Wisseman; Allotype female (pinned), 
same data as holotype; Paratypes 48(5 17?, same data as holotype, 
specimens pinned and in alcohol. These specimens are deposited in 
the Department of Entomology, Royal Ontario Museum, Toronto. 
