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Show 558 MR. R. i. POCOCK ON THR ARACHNIDA, [Dec. 4, This species may be recognized inter alia by its cylindrical an-tennal segments, and by the absence of denticles upon the under surface of the tibial and proximal tarsal segments of the anal legs. GEOPHILID^E. M E C I S T O C E P H A L U S CASTANEICEPS (Haase). Mecistocephalus castaneiceps, Haase, Die Indisch-Australischen Myriopoden, pt. i. Chilopoden, p. 102, pi. vi. fig. 109. Six specimens were taken under stones in Flying-Fish Cove. This species has hitherto only been recorded from Pulo Edam, an island on the north coast of Java. DIPLOPODA. POLYDESMID^E. CYLINDRODESMUS, gen. nov. Genus generi Strongylosoma affine ; eo discrepans quod foramina repugnatoria, absentibus carinis lateralibus, in segmcntorum superficie situm habent ; labro ad speciem ferme quadrata? laminae ex anteriore capitis margine prominentis conformato. For other characters see under the specific diagnosis. CYLINDRODESMUS HIRSUTUS, sp. n. (Fig. 2, p. 559.) Colour ochraceous or testaceous. Head-plate remarkably convex in its upper portion and cleft by a longitudinal median sulcus, which terminates before reaching the interantennal space. This space very narrow. Externally to the point of insertion of each antenna the head-plate is somewhat deeply excavated, to form a groove, which is bounded on the inner side just above the proximal joint of the antenna by a rounded prominence, and on the outer side by a conspicuous ridge which, sharply defined above, merges insensibly with the rest of the head-plate below, and is continuous with the external margin. Beneath the interantennal space the head-plate presents a shallow transverse constriction. The labrum is remarkably prominent and projects as a somewhat quadrate prolongation from the lower portion of the head-plate, its lateral margins cutting the lateral margins of the head-plate at about an angle of 135°. Its anterior margin is almost straight and feebly toothed in the middle, and its antero-lateral angles rounded. Head-plate thickly clothed with short hairs and closely but obscurely punctured. Antennae short and hairy; segments 2, 3, 4, 5, proximally narrowed, about equal in length and somewhat cup-shaped; sixth segment much larger and more cylindrical than those that precede it ; seventh segment cylindrical, small, but conspicuous. Tergites not shining, dull, rugulose, thickly clothed with short hairs and sparsely with longer hairs: first with simple margins and rounded lateral angles ; second widened inferiorly on each side; hinder half of each of the other somites above evenly arched from |
