78 
NORTH AMERICAN MALACHIIDAE 
and evenly rounded at sides in both sexes. Elytra nearly parallel, slightly 
wider than the prothorax. Sculpture and pubescence as usual. Length 2.9 
to 3.2 mm. 
A single pair beaten from live oak at Pasadena, California, in 
April. 
If the characters embodied in these two specimens prove con- 
stant, the species is peculiar in that aside from the difference in 
the length of the antennae, there are no appreciable sexual differ- 
ences either in color or bodily form. The general appearance 
is strikingly like that of the female of laticeps, except for the 
darker prothorax of the latter. 
Microlipus longicollis Motschulsky, Bull. Soc. Imp. Nat. Mosc., 1859, p. 
405. 
On comparison some years ago, a male specimen from Pasa- 
dena, California, seemed identical with an example of this species 
in the LeConte collection sent by Motschulsky. Horn says, 
“thorax longer than wide”; Motschulsky used the expression 
“thorace subelongato.” I did not take measurements of the 
LeConte example, but in the series at hand the length of the 
thorax varies from a trifle less to slightly greater than the width, 
the variation being quite independent of sex. This species is 
rather closely related to the next, but may probably be separated 
with certainty by the broadly rufous sides of the prothorax. The 
elytra vary in color from aeneo-piceous to bluish or greenish. 
The series at hand consists of four males and twelve females, all 
collected by Dr. Fenyes in California, and bearing locality 
labels — Santa Monica, Redondo, Catalina Island, Pasadena and 
Sugar Pine (Yosemite region). Motschulsky’s type was said to 
be from “Nova Helvetia,” a locality which I am at present 
unable to interpret, but Horn gives simply California. 
Microlipus moerens LeConte, Proc. Acad. Sci. Phila., 1859, p. 283. 
This species and the preceding — as indicated in the table — 
are readily separated from all others by the elytra being appen- 
diculate in the male, and not tipped with yellow in the female. 
The color in the present species is greenish black with the 
margins of the prothorax very narrowly rufous at the hind angles 
only. In one example from Sonoma County, California, the 
pale color at the hind angles of the prothorax is wanting, the 
specimen agreeing throughout with the description of Motschul- 
sky’s uniformis, which I have no doubt belongs here, rather than 
