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Show 1900.] INSECTS AND ARACHNIDS FROM SOMALILAND. 29 elevatis instructo, carinis omnibus fere cequilongis, a basi ad declivitatem apicalem extensis; segmentis 2° 3°que abdominis in medio rufulo-pilosis. Long. 19, lat. (ad med. elgtrorum) 10| mm. Hab. Central or East Somaliland (1897). One example. Type in British Museum. Black; prothorax strongly convex above, and strongly and rather thickly punctured ; its sides slightly rounded in the middle and feebly marginate posteriorly, the margins becoming obsolete in front. Elytra depressed along the suture, each with three well-marked carina? reaching from the base to the posterior declivous portion, the intervals between the carina? being rather strongly concave ; the concave sutural area between the innermost carina? is sparsely granular in its anterior half. Femora rugosely punctured. Second and third abdominal segments with a patch of reddish pubescence in the middle. SEPIDIOSTENUS ERINACEUS Fairm. North Central Somaliland : Bally Maroli in the Haud District, June 25, 1897. Nine specimens, captured in the open plain. SEPIDIUM MAGNUM Gahan, sp. n. (Plate I. fig. 12.) Pube pallide cervina dense obtectum: prothorace utrinque plaga subnuda nigra, elgtris rugis elevatis glabris nigro-fuscis, plagis adspersis cretaceis; prothorace basi apiceque constricto, lateraliter carinato, carina antice obtusa, pone medium tuber-culatim dilatata, disco in medio carinato, antice valde tuber-culato, tubercido crasso, apice rotundato supra sulcato-impresso haud bifurcato ; elytris utrisque longitudinaliter bi-carinatis, transversim reticulatimque rugosis. Long. 29-35, lat. (ad elytrorum) 12-15 mm. Hab. Central or East Somaliland (1897). Four examples. Type and co-type in British Museum, co-types in Hope Collection. Brownish black, with the head, prothorax, underside, legs, and antenna? thickly covered with a pale fawn-coloured pubescence. Prothorax furnished with a large prominent tubercle, directed obliquely forwards from the anterior part of the disc; this tubercle is rounded at the extremity, impressed along the middle with a linear groove, and has on each side a naked and rugose black patch; from the base of the tubercle a median carina runs along the disc to the base of the prothorax. On each side of the prothorax there is a carina, obtuse in front, but more acute and prominent behind the middle, there forming a flattened tubercle, behind which the prothorax is abruptly constricted. Elytra each with two longitudinal and more or less sinuous carina?, each of which gives off short transverse or reticulating ridges on both sides. This species is one of the largest of the genus, being equal in size to S. ruspolii Fairm., from which it differs chiefly in having the lateral tubercles of the prothorax placed behind the middle |