Opisthophthalmus in the British Museum. 239 



The localities so far known for this species are Tette on the 

 Zambesi and Caffraria (!) (Wahlberg Coll.). The British 

 Museum has examples from Tette (Keyserling Coll.), Lake 

 Nyasa, ? southern shore (Universities Mission, Capt. Maclear 

 and Mr. Bettingham), and from Mashunaland (Salisbury, 

 5000 feet, Umfuli River, 1200 feet: G. A. K. Marshall), 

 making a total of ten specimens (males, females, and young). 



The pectinal teetli vary in number as follows : — 



Specimens from Nyasa: ?, 10-10, 11-11; <J, 12-12, 

 13-13, 13-13. 



Specimens from Tette: ? young $ , 11-11. 



Specimens from Salisbury : ? , 10-12, 13-13 ; J (young), 



16. 

 Specimens from Umfuli : $ (adult), 16-18. 



According to Kraepelin the pectinal teeth in the males that 

 he saw were 18-19, while Peters gives 23 for this sex, a 

 number which is nearly double that of one of the males from 

 Nyasa. 



Another feature which is, according to Kraepelin, charac- 

 teristic of this species is the distinctness in the female of the 

 upper crest on the anterior surface of the humerus ; but it is 

 not distinctly denned in any of the females examined by me 

 except in the one from Tette. Moreover, it is only in the 

 young example from Tette and in one from Salisbury that 

 the interocular area of the carapace is perfectly smooth. In 

 all the other specimens it is in both sexes distinctly though 

 finely granular in front ; and in one of the females from 

 Umfuli the first dorsal plate is finely granular at the sides. 

 1 have very little doubt, however, that all the specimens 

 under discussion are cospecific. 



Opisthophthalmus pugnax, Thorell. 



Opisthophthalmus pugnax, Thorell, op. cit. p. 232, rf . 

 Opisthophthalmus curtus, id. ibid. p. 234, <j> (teste Kraepelin). 



Of this species, the synonymy of which I adopt from 

 Kraepelin, the Museum has only four examples in alcohol, 

 i. e. one adult female from Durban (Capt. Munn), two young 

 males from Basutoland (R. C Wroughton), and one adult male 

 from King William's Town. The pectinal teeth in these 

 examples are as follows : — ? from Durban, 13-14 ; <$ from 

 King William's Town, 17-18; $ from Basutoland, 12-12, 

 13-13 — whereas, according to Kraepelin, they are 15-15 in 

 a male and 10-12 in the females. 



