618 REV. H. s. GORHAM ON [Dec. .3, 



10. Brachysphenus mutabilis, sp. nov. 



Oblongus, elytris gibbosis, late rufus ; antennis, corpore infra, 

 pedibiis elytrorumque maculis duabus subquadratis nigris, elytris 

 distincte punctato-striatis. 



Long. 12 millim. 



Hub. Peru, Chancamayo {Buckley). 



Like B. glyptoderas, but difFereutly 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 coxae 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, glahratus ; elytris singulis seriebus quinque punctorum 

 postice abbreviatis, externe punctis nonnullis confuse dispersis ; 

 flavis, sutura, limbo laterali tenuiter plagiaque magna in singulis 

 suturce adjuncta nigris, abdomine castaneo-rufo. 



Long. 12 millim. 



Hab. Colombia, Medellin. 



This species resembles no other that I am acquainted with except 

 Acronotus anmdaris. 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 Sterno- 

 lobvs. The sterna, legs, epipleurse, 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. AuiiACocHiLUs moltjccanus, sp. nov. 



Late ovatus, nigro-subccerulescens, glaber, nitidissimus, pedibus 

 abdomineque castaneis, elytris convexis. 



Long. 7 millim. 



Hab. New Guinea. 



Var. immaturus 1 piceus, corpore infra dilutiore. 



Hab. Mysol {coll. Armitage). 



Head smooth, excepting the epistome, which is rather thicklv 

 punctured ; antennae 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 



