CRYPTOCEPHALUS. 117 
_ the dise obscure piceous ; elytra strongly punctured, the interstices and a spot on the shoulders more or 
less piceous, the three outer interstices costate. 
Length 1 line. 
Head not visibly punctured, slightly depressed between the eyes, obscure fulvous; antenns extending to about 
half the length of the elytra, fulvous, the five apical joints more or less fuscous; thorax twice as broad as 
long, not very convex, the sides narrowed in front, the posterior angles acutely produced, the surface 
impunctate (extremely minutely granulate when seen under a strong lens) and only slightly shining ; 
scutellum not longer than broad, nearly black ; elytra rather regularly and strongly punctate-striate, the 
second and third and the fifth and eighth striw joined at the apex, the sixth and seventh indistinct and 
interrupted near the middle by a short raised smooth space, the remainder of the sixth and the two outer 
interstices strongly costate ; the breast more or less piceous, the rest of the underside and the legs fulvous ; 
prosternum subquadrangular, its posterior margin slightly concave. 
Hab. Panama, Volcan de Chiriqui (Champion). 
C. tricostatus varies in colour, some examples being nearly unicolorous testaceous and 
others spotted with black at the shoulders and between the punctures (assuming the 
shape of an obscure longitudinal band near the suture). ‘The principal characters by 
which the species may be recognized are the entirely impunctate and minutely granulate 
thorax and the costate lateral interstices of the elytra, the sixth interstice being inter- 
rupted before the middle by the tubercular smooth raised short space which limits 
the punctures below the shoulders; the extreme basal margin of the elytra is narrowly 
black. 
51. Cryptocephalus laterifasciatus. 
Black, the head, the base of the antenne, and the thorax fulvous, the disc of the latter black and nearly 
impunotate ; elytra greenish-black, deeply punctate-striate, the fifth and sixth interstices and the apex 
flavous; legs fulvous. 
Var. Thorax not marked with black on the disc. 
Length -1 line. 
Head with a longitudinal depression between the eyes, flavous, the eyes closely approached ; antenne half the 
length of the body, the lower four joints flavous, the other joints black and distinctly thickened ; thorax 
strongly narrowed in front, the sides rounded, the surface extremely finely punctured, fulvous, with a 
plackish-green spot at the middle of the disc; scutellum strongly raised, scarcely longer than broad, 
blackish-green ; elytra cylindrical, with distinct rows of punctures, the lateral interstices longitudinally 
costate but interrupted below the shoulders by a short transverse smooth space which is bounded above 
and below by a few deep punctures, the surface metallic greenish-black, the sides with a narrow flavous 
longitudinal stripe which is connected by a very narrow streak with the flavous marking at the apex ; 
pygidium black, with two obscure flavous spots at the sides; legs fulvous. 
Hab. Guavemata, Pantaleon (Champion); Panama, Bugaba, Volcan de Chiriqui 
(Champion). 
In its peculiar coloration, this small species has no near ally amongst its many con- 
geners from our region. Some specimens have the thorax fulvous, with the margins 
paler; in others the disc is very obscurely marked with fuscous. In the male the sixth 
elytral interstice is very distinctly interrupted below the shoulder ; in the female the cor- 
responding transverse space is broader and less deeply bounded by punctures, but still very 
plainly visible. The flavous stripe is confined at the base and near the apex to a single 
