Regions of Lakes Nyasa and Tanganyika. 433 



Genus Acanthodon, Gudrin. 



Acaniliodon lacastris^ Pocock. 



Acanthodon lacustris, Pocock, Proc. Zool. Soc. 1897, p. 731, pi. xli. 

 fig. 7. 



Loc. Kinjamkolo, Lake Tanganyika ( W. H. Null) . 



Suborder Arachnomorph^. 



Family Eresidae. 



Genus Eresus, Walck. 



Eresus inornatuSy sp. n. (PI. XIII. fig. 1.) 



Colour. Carapace and limbs a uniform blackish brown ; 

 abdomen ashy grey; hairy covering greyish black. 



Carapace as long as patella, tibia, and protarsus of fourth 

 leg and the four distal segments of first leg ; width of head 

 less than patella and tibia of fourth leg, about equal to patella 

 and tibia and protarsus and tarsus of first. 



Vulva with narrower septum between the fovea than in 

 Jiimosus. 



Measurements in millimetres. — Total length 17 ; length of 

 carapace 7 ; width of head 4*5 ; length of first leg 13*o, of 

 fourtli 13. 



Loc. Nyika plateau, 6000-7000 feet {A. Whyte). 



Allied to E. fumosus, C. Koch, from Cape Colony, but 

 differing in its smaller size, narrower septum of vulva, head 

 lower just in front of fovea, and shorter first leg as compared 

 with width of carapace. 



Family Argiopidse. 

 Genus Nephila, Leach. 



Nephila cruentata (Fabr.). 



Aranea cruentata, Fabr. Ent, Syst, ii. p. 427 (1793) {=genmlis, 

 Gerst.). 



Loc. Zomba, 3000-9000 feet (//. H. Johnston) ; Lake 

 Nyasa [Universities' Mission). 



Neph ila pilipes (Lucas). 

 Epeira pilipes, Lucas, Thomson's Arch. Ent. ii. p. 416. 

 Loc. Zomba, 3000-9000 feet, S. Nyasaland ; Kondowe to 

 Karonga and Masuku, N. Nyasaland {A. Whyte). 



