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Show 274 MR. M. JACOBY ON COLEOPTERA [May 21, posteriorly, the interstices slightly convex ; underside black; legs fulvous, the posterior tibiae sometimes piceous ; anterior coxal cavities closed. From Corozal. Although I have not much doubt that I am rightly referring the present insect to von Harold's genus, there are differences to be found which are rather impo rtant from a structural point of view ; thus in S. haroldi the antennae have the third joint nearly twice as long as the preceding, instead of these joints being both extremely short; the posterior femora also do not extend beyond the abdomen as in the type, and the posterior tibise are distinctly channelled near the apex; as, however, all other characters, including the thoracic groove placed closely to the margin, the closed cavities and other details, agree well with the description of that author, the above-mentioned differences are doubtless more specific than generic From S. haagi, S. haroldi is well distinguished by the transversely shaped, not quadrate, thorax and the black underside. CREPIDODERA CASTANEA, n. sp. Dark brown ; antennae and legs flavous ; thorax subquadrate, strongly punctured ; elytra regularly punctate-striate, the interstices costate at the sides. Var. above paler brown. Length |-1 line. Head impunctate, the frontal tubercles small but distinct, the lower part of the face rather deflexed and flattened, nearly smooth; palpi flavous ; antennae slender, nearly two thirds the length of the body, entirely flavous, all the joints with the exception of the second of nearly equal length ; thorax one half broader than long, the sides concave, the angles acute, the surface rather convex, with a not very deep transverse sulcation near the base, which is not bounded laterally by a longitudinal groove, but extends upwards a short distance along the sides, the disk strongly punctured ; elytra convex, pointed at the apex, the basal portion distinctly raised, regularly and rather strongly punctate-striate, of a uniformly dark brown colour like the head and thorax ; legs entirely flavous ; the first joint of the posterior tarsi as long as the three following joints together ; anterior coxal cavities closed. San Esteban. This very small species seems to be allied to C. pleuralis, Har., from Bogota as regards the non-limited thoracic groove ; the shape of the thorax and the daik uniform brown colour of the upper surface will help to distinguish C. castanea from its allies. CACOSCELIS (?) SEMIFULVA, n. Sp. Reddish fulvous ; the antennae, the apex of the femora, and the tibise and tarsi black; thorax impunctate ; elytra metallic blue, extremely closely and finely punctured. Length 2 lines. Head impunctate, transversely grooved between the eyes; the |
