ALLOCHKOMA. 441 



Head with a very few fine punctures, the vertex black, the other portion testaceous, the frontal tubercles 

 obsolete and divided by a short longitudinal groove, the carina short but acutely raised ; penultimate joint 

 of the palpi incrassate; antennae half the length of the body, the sixth joint elongate and thickened, and 

 stained like the preceding joints with obscure piceous spots, the rest flavous ; thorax transverse, all tbe 

 margins nearly straight, the surface very remotely and finely punctured, obscure testaceous,, with a narrow 

 central black band from the base to the apex; scutellum black, punctured ; elytra with a distinct trans- 

 verse depression below the base, not very closely and rather finely punctate-striate, the punctuation 

 gradually diminishing towards the apices, black, shining, with a large round obscure testaceous spot at 

 the middle, the surface of which is slightly raised ; posterior femora black, their apices only, as well as 

 the other legs, testaceous, the inner margin of the anterior femora and tibiae stained with piceous. 



Hah. Panama, Volcan de Chiriquy[ Champion). 



Only a single specimen of this pretty little species was obtained. 



14. Allochroma flavonotatum. (Tab. xxv. fig. 15.) 



Obscure testaceous ; thorax nearly impunctate, trifoveolate ; elytra deeply punctate- striate j obscure- testaceous, 

 each with a pale flavous spot, surrounded with black, at the middle. 



Length 1| line. 



Head impunctate, deeply transversely grooved ; palpi moderately robust ; antennae more than half the length 

 of the body, obscure fulvous, the joints (with the exception of the third, which is slightly longer) of nearly 

 equal length in the male, the apical joints much shorter in the female ; thorax not more than one half 

 broader than long, the sides perfectly straight, a little constricted near the base, the angles acute and 

 furnished each with a single hair, the surface impunctate, with three rather deep fovea? placed close to 

 the basal margin ; scutellum impressed at the base ; elytra slightly depressed below the base, deeply 

 punctate-striate, the interstices slightly convex in the female, furnished here and there with single stiff 

 hairs, of an obscure testaceous colour, with a transverse pale flavous spot, bounded in front and behind by 

 a black or piceous band of a semicrescent shape (generally connected at the suture but not at the lateral 

 margin), at the middle of each elytron ; underside and legs testaceous. 



Hab. Panama, Volcan de Chiriqui {Champion). 



The anterior dark band of the elytra, when it is strongly marked, extends to the base, 

 leaving only a small space surrounding the scutellum of the ground-colour ; the margins 

 of both the black bands are deeply dentate. 



15. Allochroma posticatum. (Tab. XXV. fig. 11.) 



Glabrous, fulvous ; antennse, the base of the head, and two or three longitudinal bands on the thorax, black ; 

 elytra strongly punctate-striate, fulvous, a sutural and a lateral spot anteriorly, and the posterior half of 

 each, black. 



Length 2 lines. 



Head with a few punctures and a fovea at the middle of the vertex, the latter either entirely black or fulvous 

 with a black spot, the anterior portion, and the very strongly raised frontal tubercles, fulvous ; antennae 

 thickened at the terminal joints, black, the five basal joints thinner, glabrous, and obscurely stained with 

 fulvous below ; thorax transversely subquadrate* twice as broad as long, the sides perfectly straight, the 

 surface with a transverse depression (which extends some distance upwards at the sides) near the base, 

 another longitudinal more or less distinct groove may be seen close to the lateral margin, the disc with 

 some remotely placed punctures, fulvous at the middle, and at the extreme sides a longitudinal black 

 stripe extends from the base to the apex ; scutellum black ; elytra wider at the base than the thorax, 

 slightly narrowed towards the apices, depressed near the suture below the base, distinctly punctate- 

 striate, the punctuation diminishing posteriorly from the base to nearly the middle, with three longitudinal 

 marks, one at each shoulder, widened behind, and joined near its apex to a similar sutural mark (the 

 points of these marks are deeply dentate, forming three acute projections), and the portion from below 



biol. centk.-amek., Coleopt., Vol. VI. Pt. 1, June 1886. 3 1 



