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Show 754 MR. R. I. POCOCK ON ETHIOPIAN SPIDERS. [June 15 Genus CERATOGYRUS, nov. Differing from Pterinochilus in that the thoracic fovea is very strongly procurved and forms almost a complete circle surrounding a central tuberculiform prominence which sometimes takes the form of a long conical process. Type, C. darlingil, sp. n. CERATOGYRUS DARLINGII, sp. n. (Plate XLII. nV. 5 and Plate XLIII. figs. 1-1«.) & 2 .-Colour as in the following species C. marshalli, but the carapace ornamented with radiating white lines as in Harpactira tigrina, and the lower side of the femora of the 3rd and 4th legs paler, and contrasting with the black of the coxae much more sharply than is the case in C. marshalli. Carapace exceeding the length of patella and tibia of 1st leg by one-third of the protarsus, of the 4th by one-half the protarsus; about equal to tarsus, protarsus, and tibia of 2nd ; much exceeding protarsus and tarsus of 4th; elevated especially in the cephalic region ; the process arising from the fovea taking the form of a long conical horn, longer than its basal width, which is twice the width of the ocular tubercle; tubercle nearly spherical, only a little longer than the clypeus. Legs 1, 4, 2, 3; patella and tibia of 1st longer than of 4th, also longer than tarsus and protarsus of 4th, and almost equal to tibia, protarsus, and tarsus of 3rd ; tarsus and protarsus of 3rd a little less than those of 2nd ; spine armature as in the other species of the group. Measurements In millimetres. Total length 51 ; length of carapace 24-5, width 20 ; length of 1st leg 59, of 3rd 51, of 2nd 44, of 4th 56 ; patella and tibia of 1st 22, of 4th 18-5; tarsus and protarsus of 4th 21. Loc. Enkeldoorn, 110 miles S. of Salisbury in Mashunaland (J. ffolllott Darling). Three adult females. I have great pleasure in dedicating this species, certainly the most remarkable Spider of this group that has been discovered of late years, to Mr. J. ffolliott Darling, who obtained the specimens by digging them out of their deep burrows. CERATOGYRUS MARSHALLI, sp. n. (Plate XLIII. figs. 2-2 b.) 3 •-Colour. Carapace pitchy brown, clothed with dark olive-grey hairs, hairs of the same colour covering the upper side of the femora of the appendages, while the three distal segments of the limbs are clothed with grey hairs intermixed with black; the femora of the posterior two pairs are not, however, so dark as the others, being clothed, especially basally, with hairs of a greyish golden hue; the distal extremities of femora, patellae, tibiae, and protarsi are distinctly whitish, while on the tibiae there are two faintly defined whitish lines ; coxae, sternum, and inner sides of femora and patellae of palpi and first two pairs of legs velvety black, the outer sides of the anterior femora and the lower surface of the |