OCR Text |
Show 872 MR. R. i. POCOCK O N SCORPIONS, PEDIPALPS, [NOV. 14, Measurements in millimetres.-Total length 31 ; length of carapace 15, width 12 ; length of palp 17, of 1st leg 50, of 2nd leg 47, of 3rd leg 38, of 4th leg 51 ; patella and tibia of 1st leg 26, of 4th 17, protarsus of 1st 12, of 4th 16. Loc. Benito Biver (67. L. Bates). Bi vailing the preceding species, C. kingsleyi and O. occidentalis, in size, and resembling them in the absence of the inferior apical pro-tarsal spine of the 1st and 2nd leg; but at once recognizable from both by its coloration, especially of the lower surface of the abdomen. It further resembles G. kingsleyi in having the carapace shorter than the 4th protarsus and very much in the form and size of the vulva, but differs from it and approaches C. occidentalis in having the carapace longer than the patella and tibia of the 3rd leg. The black patch on the lower side of the abdomen in C. scopulatus calls to mind the somewhat similar colouring found in Phoneutria melanogastra of Bdsenberg and Lenz (JB. Hamburg. Mus. xii. p. 12, pl. i. fig. 14), from East Africa; but the two species are certainly quite distinct, seeing that P. melanogastra is Jess than half the size of C. scopulatus and has a median pale stripe on the carapace. And lastly from Simon's species C. erythrochelis from Landana (Bull. Soc. Zool. France, i. p. 222), which also has red hairs on the base of the mandible, C. scopulatus may be recognized by the absence of pale bands on the carapace and the presence of the black field on the lower side of the abdomen. Ctenus auricularis and C. capulinus of Karsch, from Chinchoxo, also seem to differ in colour from G. scopulatus, as well as from C. occidentalis and 67. kingsleyi (see Zeits. gesammt. Naturw. Iii. pp. 347-348, 1879). CTENUS RIVULATUS, sp. n. (Plate LVII. figs. 26, 26 a.) 2 . Colour. Carapace covered with blackish or olive-brown hairs, with a median pale golden stripe, and a broad irregular interrupted submarginal band extending from the sides of the clypeus to the posterior border; upperside of abdomen ornamented with a median golden-yellow or greyish band, narrow in front and indented at the sides with four pairs of large black spots; sides of abdomen blackish, mottled with yellow or grey spots ; on the lower side the pale spots are arranged in definite longitudinal posteriorly converging lines ; sternum, coxae, and lower side of legs uniformly deep brown; upperside of legs varied, especially on the femora, with golden-yellow bands, the rest of the segments tinted with yellow ; palpi uniformly dull brown ; mandibles black in front, without bright coloured base. Carapace slightly elevated above behind the fovea, as long as patella 4-tibia of 3rd leg, as tibia of 1st, and a little longer than protarsus of 1st and than tibia of 4th, about four fifths of the protarsus of the 4th; ocular quadrangle more narrowed iu frout than in C. scopulatus, its eyes relatively larger, the anterior separated by a space which about equals the radius. Legs 4, 1, 2, 3; patella4-tibia of 4th a little less than of 1st |