158 
Psyche 
[June 
— Sides of pronotum (figs. 16-17) slightly to strongly diverging 
for at least three-fourths of their lengths; antennal segment 3 
less than 1.5 X as long as 4; body more elongate, TL/EW 
2.45 or more; clypeus deeply notched in male (fig. 15). 4 
4. Sides of pronotum (fig. 17) strongly diverging for four-fifths 
of their lengths; elytral intervals flat; body usually smaller and 
more elongate (length usually less than 2.3 mm. and TL/EW 
greater than 2.50) ; northern part of continent. . . castaneum Say 
— Sides of pronotum (fig. 16) slightly diverging for three-fourths 
of their lengths; elytral intervals convex; body usually larger and 
less elongate (length usually more than 2.3 mm. and TL/EW 
less than 2.50) ; Arizona and New Mexico. .... oonditum, n. sp. 
Cerylon calif ornicum Casey 
(Fig. 31) 
Cerylon calif ornicum Casey, 1890: 316. Type locality: Lake Tahoe, Cali- 
fornia. Holotype, No. 48834 U.S.N.M. 
This is the most distinctive of the North American Cerylon be- 
cause of its large size (3 mm. or mor*e) and obvious vestiture. The 
body is also much stouter and more convex than in other species, 
although the elytral intervals are almost flat. It resembles C. cas- 
taneum and C. conditum in having a more elongate pronotum and 
deeply notched clypeus in the male, but both of those species are 
smaller, flatter, and subglabrous. 
Distribution. Extending from southern Oregon into northern 
California and south in the Sierra Nevada to Tulare County. 
Biology. Collected by sifting moist coniferous forest litter in July 
at medium elevation in the Sierra Nevada. Philothermus occidentalis 
was collected in this same habitat. 
Cerylon castaneum Say 
Cerylon castaneum Say, 1827: 259. Type locality: Canada. Neotype, $, 
No. 32238 M.C.Z. (designated by J. F. Lawrence, April, 1975). 
Cerylon clypeale Casey, 1897: 636. Type locality: Kansas. Holotype, $, 
No. 48833 U.S.N.M. New Synonymy. 
Cerylon sticticum Casey, 1897: 636. Type locality: Iowa City, Iowa. Holo- 
type, 2, No. 48832 U.S.N.M. New Synonymy. 
Individuals of this species are the narrowest, flattest, and usually 
the smallest of the North American Cerylon. They may occur with 
C. unicolor , from which they may be distinguished by the apically 
expanded pronotum, elongate and flattened body, and deeply notched 
clypeus in the male (figs. 15 & 18). 
