. Bulletin of the California Academy of Sciences. Natural history; Science. 62 CALIFORNIA ACADEMY OF SCIENCES. Female: Form and color as in male. Labrnm project- ing, rugose, covering the mandibles. Head; clypeal mar- gin raised; a feeble tubercle just in front of the clypeal suture, immediately behind which is a central trans- verse ridge, undivided, slightly higher in the middle and slightly apiculate at either end. Antenna9 less robust than in the male. Thorax: very convex, shining; out- line obtusely triangular; anterior margin seen from FEMALE. above, truncate in the centre; angles j^rodu
. Bulletin of the California Academy of Sciences. Natural history; Science. 62 CALIFORNIA ACADEMY OF SCIENCES. Female: Form and color as in male. Labrnm project- ing, rugose, covering the mandibles. Head; clypeal mar- gin raised; a feeble tubercle just in front of the clypeal suture, immediately behind which is a central trans- verse ridge, undivided, slightly higher in the middle and slightly apiculate at either end. Antenna9 less robust than in the male. Thorax: very convex, shining; out- line obtusely triangular; anterior margin seen from FEMALE. above, truncate in the centre; angles j^roduced; sides rounded; posterior margin much produced to meet the scutellum, sinuate toward the angles which are rounded; the front discal area characterized by a bi-lobed transverse riised line at either enl of which, outward and for- ward, is a well formed but depressed tubercle; behind which line the disc is dense with coarse corrugated punctures, which become scattered and plain, nowhere reaching the posterior margin, but taking a transverse course, barely reach the side margins, where they become less distinct. Elytra: much the same as in the male, but the interstices of the fourteen punctate striae a tdfle more wrinkled and much more convex. Length, smaller than the male. Habitat: burrowing in the ground near the city of Sonora, Tuolumne Co., Cal.; found also in Sacramento Co. The name selected for this species is intended to be a slight tribute of hon" or to Dr. Geo. H. Horn, the emiaent Coleopterist, as a slight return for many favors. STRIDULATINa ORGANS. Chas. Fiichs, Esq., having obtained living specimens of the above new species of Bradjcinetas discovered thit it pos- sessed the power of stridulating. His researches through coleopterological literature disclose nothing relative to the stridulating faculty in this genus. The latest work on class- ification, that of L3 Conte and Horn, makes no mention of it, and as these able authors always notice such biologic char
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