Memoirs on the coleoptera

CERAMBYCID^E 283
pale testaceous; punctures of the head and pronotum much finer and
more remotely scattered than in any of the preceding, the prothorax
a little longer than wide, parallel, evenly and rather strongly
rounded at the sides, subconstricted at the base as usual, convex,
distinctly narrower than the elytra; scutellum relatively not so
small though nearly nude; elytra more than twice as long as wide,
not parallel as in the preceding forms but gradually narrowed from
base to the rather narrowly rounded apices, not at all swollen behind
the middle, the punctures smaller, very minute and even more
remotely scattered, the fasciae nearly similar, the posterior shorter,
being more widely interrupted at the suture; legs nearly as in nitidus,
rather short and relatively small, though the femora are strongly
clavate; punctures of the prosternum (cf ) coarser and more conspicuous
than in nitidus, close, almost crowded. Length (d") 4.6
mm.; width 1.25 mm. California (locality unrecorded).
exilis n. sp.
Group IV.
Subgenus Microcallidium nov.
The typical forms are allied to the preceding in the very short
tarsi, but differ conspicuously in general habitus, as well as in the
completely divided eyes; the species more closely resemble minute
members of the restricted genus Callidium than any usual form
of Phymatodes. With the typical species, amcenum Say, are asso-
ciated for the present two narrower and more convex species, which
differ greatly in their undivided eyes. The species known to me
may be easily known as follows:
Elytra evenly and strongly, not densely punctate; form broader and more
depressed
2
Elytra less coarsely and more closely punctate; form narrow and sub-
cylindric, eyes not divided 3
2 Oblong, feebly convex, strongly shining, pale testaceous throughout
above and beneath, except the elytra, which are of a uniform dark
steel-blue and the antennae and tibiae, which are black, the former
picescent distally, the tarsi piceous; vestiture sparse, erect, rather
short; head small, strongly and rather loosely punctate; antennae
very slender, as long as the body (cf) or shorter (9), the second
joint fully half as long as the third, slender; prothorax small, very
much narrower than the elytra, subprominently swollen at the sides
and widest well behind the middle, the punctures distinct, sparsely
and irregularly scattered, the surface broadly impressed along each
side of the median line basally and also very feebly, transversely
impressed apically; base a little narrower than the apex; scutellum
well developed, nude, pale in color; elytra barely twice as long as
wide, parallel, rapidly and very obtusely rounded at tip, the punctures
comparatively coarse, impressed; legs rather short, subsimilar