Memoirs on the coleoptera

46
MEMOIRS ON THE COLEOPTERA
and forming so conspicuous a feature in the allied tropical genera.
The sculpture is generally moderate, the head always with com-
pressed longitudinally anastomosing furrows and fine plication,
instead of the evenly cribrate sculpture of Limnichites, and the
scutellum is always much more elongate and more acutely ogival.
The punctures are always feebler or obsolescent toward the sides of
the upper surface, especially behind, which is not the case in Lim-
nichites, but the prosternum is constantly and similarly sulcate
along the middle. Our species, nine in number, may be separated
as follows:
Surface between the punctures, at least toward the sides of the pronotum,
more or less strongly micro-reticulate 2
Surface toward the sides of the pronotum smooth and polished, devoid
of evident micro-reticulation 7
2 Elytral punctures stronger, distinct, separated by slightly more to
evidently less than twice their own diameters 3
Elytral punctures minute, feeble and very remotely scattered, sometimes
almost completely obsolete 5
3 Prosternal episterna finely attenuate anteriorly, attaining the minute
lateral incisure of the apex or very nearly. Body oblong, convex,
very obtuse before and behind, black, with feeble grayish shining
lustre, the vestiture short, close, coarse, decumbent, pale, dull
fulvous, feebly mottled with cinereous; head with the usual anastomosing
longitudinal furrows; prothorax three times as wide as its
minimum length, strongly narrowed from base to apex, with straight
sides; surface with a very fine and feeble transverse line of greater
opacity and with a fine striiform impunctate median line evanescent
toward tip, the punctures fine, widely separated, becoming still
finer, much feebler and even sparser in the densely reticulate lateral
areas; elytra a fourth longer than wide, parallel, the sides straight,
rounding at the slightly tumid humeri, gradually broadly and evenly
rounding behind in about apical third, the punctures not very deep
or coarse, separated by not quite twice their diameters; abdomen
rather dull, the micro-reticulation everywhere strong, the surface
somewhat longitudinally furrowed, with fine, well separated punctures
which become coarse and coalescent at the sides, forming a
coarse marginal furrow, the last
1
segment (c/ ) with a median area,
pointed behind, which is depressed, extremely densely, finely chagrined
and densely clothed with long yellowish-cinereous hairs,
the pubescent area smaller, feebler and less definite (9). Length
2.15-2.45 mm.; width 1.15-1.3 mm. California (about Monterey
Bay). [Limnichus analis Lee , Bull. U. S. Geol. Surv., V, 1879,
p. 515]
A Similar to the preceding but smaller and narrower,
analis Lee.
the vestiture
rather closer and more conspicuous, the pronotal punctures still
finer and sparser; abdomen more shining, finely, sparsely punctate,