Decasticha decemguttata Champion 1911

♂. Oblong, narrow, moderately shining, black; above rather sparsely, the under surface densely, clothed with glittering green, golden, and blue scales, which are here and there clustered into small spots on the elytra, the elytra also each with five rather larger patches of pallid scales (two placed transversely at about the basal fourth—one on the fourth interstice and one near the lower margin beneath,—two placed transversely on the outer part of the disc beyond the middle, and one near the apex); the surface also set with scattered decumbent minute setæ. Head and rostrum sparsely punctate, the rostrum longer than broad, obsoletely canaliculate to the rather deep inter-ocular scales; antennal scape not reaching the posterior margin of the eyes, the latter large, rounded, and moderately prominent. Prothorax nearly as long as broad, bisinuate at the base, the sides becoming parallel posteriorly and converging in front; sparsely punctate and with coarser punctures along the flanks, the disc with a large, deep, horseshoe-shaped excavation preceded by a short median sulcus. Scutellum large. Elytra elongate-triangular, flattened towards the suture, mucronate at the tip, the humeri obliquely truncate in front; with ten rows of rather coarse punctures, the interstices closely punctulate and almost flat.
 
Length 9, breadth 2 4/5 millim.

Hab.COSTA RICA (Mus. Brit., ex coll. Sharp).

One male, rather worn above, probably captured by Biolley. Very like Exophthalmus jekelianus (= stellaris, Pasc.), but with ten striæ only on the elytra, the elytra themselves narrowing from the base and flattened along the suture; the rostrum feebly canaliculate (instead of carinate); the prothorax more elongate; the legs and antennæ shorter. The elytra are shorter and differently marked, and the eyes much larger, than in D. tetrastigma.