Memoirs on the coleoptera

BYRRHID.E 47
the triangular depressed opaque and densely pubescent spot of the
last segment (cf) relatively broader, at base rather more than a
third as wide as the segment, whereas in an a Us it is much less
than a third as wide as the segment. Length 1.8-2.2 mm.; 0.95-1.2 mm. Arizona (Riverside),
width
Wickham.
rugiceps n. B
subsp.
Similar to analis but more parallel and relatively more elongate,
the elytral punctures rather smaller, fully as well separated and
notably feebler, the coarse decumbent hairs more readily denuded
or less persistent; impressed median line of the pronotum much
broader and deeper but only extending from the base to slightly
beyond the centre; elytra much longer, a third longer than wide;
abdomen slightly alutaceous, finely, sparsely punctate, the last
segment (d") as in analis. Length 2.2 mm.; width 1.15 mm.
Colorado (Denver) coloradensis n. subsp.
Prosternal episterna acute and attenuate anteriorly but more rapidly
so and not quite attaining the apex or the lateral fissure at apex;
sculpture not so 4
strong or dense 4
Form somewhat as in analis but much smaller, more shining and more
finely and sparsely punctate, oblong-oval, convex, shining, black,
not densely clothed with moderately coarse decumbent and slightly
variegated pubescence; prothorax strongly transverse, the converging
sides straight, the surface feebly micro-reticulate, strongly at the
sides, the punctures small, widely separated, even feebler and sparser
laterally, without fine transverse line of opacity, the median line
finely impressed in about basal half only; scutellum very minutely,
sparsely punctulate; elytra barely more than a fourth longer than
wide, obtuse behind, the sides parallel and just visibly arcuate thence
to the slightly rounded humeri, the punctures small, feeble, separated
by three to four times their widths; abdomen strongly shining, finely
but strongly, sparsely punctate, the punctures coarse and close
narrowly along the sides and apex, the last segment (c?) with a large
central pubescent area, which is strongly, densely punctate but
rather indefinitely limited and scarcely at all impressed. Length
1. 6-1. 8 mm.; width 0.8-1.0 mm. Abundant in the entire maritime
region of California. [Limnichus calif or niciis Lee., Bull. U. S.
Surv., V, 1879, p. 515] californicus Lee.
Form more elongate and more evenly, in fact very evenly, oval, much more
gradually pointed behind than any of the preceding, black, larger
and less shining than californicus, the vestiture nearly similar, not
dense, slightly variegated, pale fulvous and cinereous; prothorax very
transverse as usual, the strongly converging sides feebly, evenly
arcuate, exactly continuing the outline of the elytra, finely but
strongly, loosely punctate, rather less laterally,
sparsely but
with a feeble transverse line of opacity, the
more feebly
median line
finely impressed and striiform, obsolete apically; elytra a third
longer than wide, the sides very evenly rounded from base to apex,
gradually very little more so behind, the apex much more acutely
rounded than usual, widest between basal third and fourth, the
punctures small but rather strong, separated by slightly less than