618 REV. H. S. GORHAM ON [ Dec. 3, 
10. BrRacHYSPHENUS MUTABILIS, Sp. Nov. 
Oblongus, elytris gibbosis, lete rufus ; antennis, corpore infra, 
pedibus elytrorumque maculis duabus subquadratis nigris, elytris 
distincte punctato-striatis. 
Long. 12 millim. 
Hab. Peru, Chancamayo (Buckley). 
Like B. glyptoderus, but differently shaped; the thorax is 
wider and has the sides much more rounded; the elytra are much 
more convex, their surface (as well as that of the thorax) is 
smoother, but with the series of punctures more distinctly impressed ; 
the scutellum is black in one example, reddish in another ; the 
underside is black, excepting the head, which is wholly red, the 
sides of the thorax, the two apical segments, and a spot in the 
middle of two segments preceding them. The cox and the 
trochanters are pitchy red. The thorax in one example has a spot 
on the front margin, four small ones transversely placed, and three 
linear basal marks, but all nearly obliterated. This insect is no 
doubt subject to variation, but, from its form and the smooth sur- 
face, is distinct from B. glyptoderus. 
11. BRACHYSPHENUS PERVERSUS, Sp. Nov. 
Ater, glabratus ; elytris singulis seriebus quinque punctorum 
postice abbreviatis, ewterne punctis nonnullis confuse dispersis ; 
fravis, sutura, limbo laterali tenuiter plagiaque magna in singulis 
suture adjuncta nigris, abdomine castaneo-rufo. 
Long. 12 millim. 
Hab. Colombia, Medellin. 
This species resembles no other that I am acquainted with except 
Acronotus annularis. If the yellow ring of that species were 
obliterated just behind the scutellum the pattern of the elytra would 
be nearly similar. The head and thorax are, however, entirely jet- 
black. The structure of the prosternum is, moreover, that of Séerno- 
lobus. The sterna, legs, epipleure, and limb of the elytra are black ; 
the abdomen chestnut-red, without spots or clouds. The form of 
the insect is almost exactly that of Acronotus; the elytra, however, 
are rather more convex than in A. annularis. 
12, AULACOCHILUS MOLUCCANUS, sp. nov. 
Late ovatus, nigro-subcerulescens, glaber, nitidissimus, pedibus 
abdomineque castaneis, elytris convexis. 
Long. 7 millim. 
Hab. New Guinea. 
Var. immaturus ? piceus, corpore infra dilutiore. 
Hab. Mysol (coll. Armitage). 
Head smooth, excepting the epistome, which is rather thickly 
punctured ; antenne pitchy black, the apex of the club and the basal 
joint paler, the third joint distinctly elongate, the fourth to the 
seventh bead-shaped, the eighth transverse ; palpi pitchy red. The 
thorax is, at the base, more than twice as wide as long, the base 
