H. C. FALL 
75 
Elytra not or only very slightly inflated posteriorly in the female; 
head in the male evidently wider than the prothorax, the pale 
lateral margins of the latter better developed, especially at the 
front angles laticeps 
Prothorax distinctly wider than long in both sexes, sides broadly 
pale aequalis 
Elytra appendiculate in the male, the appendix more or less testaceous in 
color; females apterous; the elytra strongly inflated posteriorly, unicolorous; 
pronotum as viewed in profile rather strongly, broadly reflexo-explanate pos- 
teriorly. 
Pronotum with sides broadly rufo- testaceous, ai)ical half of tibiae and base of 
tarsi testaceous — at least in the male longicollis 
Pronotum with hind angles only narrowly pale, legs dark throughout. 
moerens 
Miorolipus prolixicornis Fall (MalacJdus). Occ. Pap. Cal. Acad. Sci., viii, 
1901, p. 246. 
This species is conspicuously distinct from all others of the 
genus by its strongly pectinate male antennae, which are full}'’ as 
long as the entire body. In the female the antennae are mod- 
erately serrate and scarcely attain the middle of the elytra. 
The form is slender, color piceous bronzed, thorax with yellow 
margins of variable width. Thorax sinuately narrowed behind, 
all the angles rounded. Elytra not appendiculate, but with 
yellow tips in both sexes. Length 3.3 to 3.6. mm. 
California: Pasadena. 
Microlipus laevicollis Horn, Trans. Am. Ent. Soc., iv, 1872, p. 116. 
This species is unknown to me in nature. It was described by 
Horn from a unique male specimen from Nebraska in the Ulke 
collection, and I do not know if it has been duplicated. It may 
be known from all our other species by the smooth and shining 
head and prothorax, the latter — according to Horn— propor- 
tionately broader than in any other species known to him. The 
entire lack of testaceous margin to the prothorax seems also to be 
a unique character among the species with non-appendiculate 
elytra. Laevicollis is the only species of the genus known from 
the interior of the continent, all others being confined to the 
true Pacific Coast fauna: an interesting condition which is 
exactly paralleled in the very closely related (if really generically 
distinct) Malachius, all the native species of which are members 
of the Pacific Coast fauna, with the single exception of ulkei, de- 
scribed from Dakota. 
TRANS. AM. ENT. SOC., XLIII. 
