234 NaTurAL History BULLETIN. 
Head, including eyes, slightly longer than wide, eyes large, 
distant about their own length from the base and from the 
constriction behind the frontal tubercles which are small, 
longer than broad, and divided by a fine sharply defined line. 
Vertex convex; between the eyes are situated two large 
pubescent foveze mutually a little more distant than they are 
from the eyes. Antenne one-half the length of the body, 
joints at base and tip oblique, parallel, the first cylindrical, 
equal in length to the width of the frontal tubercles taken 
together, second smallest, rounded, transverse. Joints three 
to ten nearly equal, very little broader than long, eleventh 
cylindrical tapering for the last third to a point, and about as 
long as the two preceding. _Prothorax about equal in width 
at the middle to the length of the head and two-thirds as long. 
Sides evenly rounded in the middle and straight toward the 
neck and base. ‘The latter is one-third wider than the neck 
and slightly narrower than the disk in the middle, Lateral 
foveze small, circular, one-third the length from the base, mid- 
dle one oblong, shallow. 7/ytra, across the rounded, not very 
prominent humeri, one-fifth wider than the prothorax, suture 
twice as long as the prothorax and one-eighth shorter than 
the greatest width of the elytra. Basal fovee deep sutural 
lines converging on the posterior half, discal lines divergent, 
obsolete near the tip. Addomen broadly margined, sides uni- 
formly arcuate, edges of each segment slightly so, each seg- 
ment uniformly vaulted from side to side, the first shorter 
than the second. Legs long slender, tarsi one-third the 
length of the tibiz, claws equal, small. Sexual differences 
unknown. 
Habitat. Middle California. 
CTENISTES Frerchenb. (Kreviorns—a hair dresser.) 
CT. PULVEREus, Lec. Piceous brown, pubescence scaly, 
gray. Length 2.3 mm. Plate VI., Fig. 16. 
Head (including eyes) longer than wide, frontal tubercles 
