OCR Text |
Show * 1902.] OF AMERICAN COLEOPTERA. 189 margins likewise black ; below flavous, the anterior legs entirely, the apex of the femora and the tibiae and tarsi black. Hab. Pernambuco, Serra de Communaty. This little species resembles somewhat the well-known D. austri-aca Schauf., but the design of the elytra is different and consists of two flavous and two black transverse angulate bands and a flavous spot at the apex : the first of these light bands is placed somewhat obliquely at the base, leaving the humeral callus black, the second is situated at the middle and is strongly constricted medially. CACOSCELIS GUIANAENSIS, sp. n. Flavous, the vertex of the head, the antennae, the femora above, and the tibiae and tarsi black ; thorax finely punctured, with two black spots ; elytra metallic green, strongly and closely punctured, the lateral margins narrowly flavous ; tibiae not emarginate. Length 10-12 millim. Hab. British Guiana. I am obliged to separate this species from the well-known C. marginata Fab., which it completely resembles in coloration, on account of the entire tibiae, the same parts in C. marginata having a very distinct emargination. Other less striking differences are to be found in the rather stouter antennae of the present species, in the more transversely shaped thorax, which is closely and finely punctured at the sides and has two large well-separated blackish spots, with sometimes a smaller intermediate one. Fabricius's species is generally found in Brazil. In the present insect the vertex of the head is likewise black, which I have not found to be the case in any specimen of the allied species. C. compta Erichs. has the sutural margins flavous as well as the lateral ones. There are four specimens before me. CACOSCELIS TIBIALIS, sp. n. Below flavous, above fulvous, the antennae, tibiae, and tarsi black or piceous; thorax transversely subquadrate, impunctate, obsoletely sulcate; elytra finely and closely punctate-striate. Length 7-8 millim. Of elongate and nearly parallel shape, the head impunctate, fulvous, the frontal elevations transverse, bounded behind by a deep groove; clypeus rather strongly raised between the antennae, its anterior margin straight; labrum flavous, with a few punctures ; terminal joint of the palpi acutely pointed; antennae extending slightly beyond the middle of the elytra, black, slender, the third and fourth joints more slender than the following ones but not longer, basal joint more or less fulvous below ; thorax about one-half broader than long, of equal width, the sides rounded, the anterior angles somewhat oblique, the lateral margins accompanied by a depression, the base with a shallow transverse groove; the disc impunctate, fulvous, shining; scutellum triangular, impunctate ; elytra finely punctured in closely approached, rather |