754 MS. n. I. tococK ON ETHIOPIAN SPIDEES. [June 15, 



Genus Ceratogxrus, nov. 



Differing from PterinocJiilus in that the thoracic fovea is very 

 strongly procurved and forms ahnost a complete circle surrounding 

 a central tuberculiform prominence which sometimes takes the form 

 of a long conical process. 



Type, C. darlinjii, sp. n. 



Cebatogtrtts darlij^^gii, sp. n. (Plate XLII. fig. 5 and 

 Plate XLIII. %s. 1-1 a.) 



2 . — Colour as in the following species O. marshalU, but the 

 carapace ornamented with radiating white lines as in Harpactira 

 tifjrina, 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. marshalU. 



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 Ist longer than of 4tb, 

 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 hi millimetres. Total length 51 ; length of cara- 

 pace 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 pro- 

 tarsus of 4th 21. 



Loc. Enkeldoorn, 110 miles S. of Salisbury in Mashunaland 

 (J. ffolliott 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. 



Ceratogtrxjs marshalli, sp. n. (Plate XLIII. figs. 2-2 b.) 

 cJ . — 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 v\ith 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 



