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Show 1906.] COLEOPTERA OF T H E GENUS SCIOBIUS. 251 however, appears to be normal. These distinctions cannot be regarded as of specific value, for in the long series which I have been able to examine I find a certain proportion of intermediate forms, which render it impossible to separate specifically the two extremes. On one of m y females of this species there is a note which I made in Stockholm, to the effect that this was the form which Boheman regarded as the 2 OI his bistrigicollis. In this he was certainly m error, as I have taken the latter species in copula. In the present species the sexes have not been thus definitely ascertained, but, despite its striking difference, I can have but little doubt that the 2 here described is that of brevicollis. This insect has a much wider range than any other in the genus. The Transvaal record is based on a single $ in the South African Museum. In the British Museum there is a specimen labelled " Angola," but the locality seems doubtful. 10. SCIOBIUS BISTRIGICOLLIS Boh. S. bistrigicollis Boh. op. cit. vii. 1, p. 202 (1843). Long, j 4-5f, 2 5i-6f; lat. tf 2£-3, $ 3-34 m m. Head very transverse, coriaceous, with thin pale setif orm scaling; forehead with a shallow central impression; eyes rather prominent. Rostrum longer than broad, arcuate or subangulate at base, sides sinuate, gena? angularly produced in both sexes, but much longer and sharper in the <$ ; upper surface plane, bicarinate, the carina? gently sinuate, the central carina absent or obsolescent, scaling and punctuation as on the head. Antennce long and moderately slender, piceous, with fine grey pubescence ; scape subcompressed, strongly curved, gradually clavate, funicle with third joint longer than first, subterminal joints elongate. Prothorax rather broader than long in the o*, more transverse in the 2 > the base arcuate, apex narrower and truncate, broadest at base, the sides rounded near apex in the c$ , sublinear and more oblique in the 2 '•> upper surface slightly convex, evenly set with small rounded granules, with a distinct curved lateral impression and occasionally with a faint central impressed line; colour piceous, granules bare, the interstices with fine grey or yellowish pubescence, which is denser along the median line, and there is a broad lateral band of dense whitish scales. Elytra ovate in the <$ , much broader and pyriform in the 2 j jointly emarginate at base, the sides moderately rounded and broadest about middle in the o*» but strongly rounded and broadest much behind middle in the $ ; upper surface convex in the 2 J subdepressed in the o* 5 with distinct stria? containing rows of punctures separated by granules (in the 2 the fifth stria is usually deeper than the others); the intervals slightly convex, smooth and impunctate anteriorly, but more or less strongly granulate on the declivity ; colour piceous, with fine grey depressed pubescence and patches of dense white or yellowish scaling disposed as follows : a small, quadrate patch round the scutellum, a broad, very irregular band along the inflexed margins, a narrower, |