1900.] IXSECTS AN\D AKACRXIDS FROM SOMALILAND. 57 



the middle of the ocular tubercle. Terga closely and finely- 

 granular throughout. Inferior keels of 2nd and 3rd caudal 

 segments strongly dentate. Band smooth, with a pair of weak 

 and weakly granulate crests on its upperside. 



Total length 50 mm. 



Loc. Zeyla in North-west Somaliland (E. W. Oates). In British 

 Museum. 



BUTHUS CALYICEPS PoC. 

 Cf. supra, p. 54. 



Buthus acutecabjxatus Simon. 



Buihus acutecarinatus, Simon, Ann. Mus. Grenoya, xviii. p. 245, 

 pi. viii. fig. 18 (1883). 



Loc. Zeyla, (E. W. Oates). In British Museum. 

 Occurs also in Egypt and Arabia. 



BUTHUS POLYSTICTUS PoC 



Buthus polysticius Pocock, Ann. Mag. Nat. Hist. (6) xviii. p. 178, 

 pi. xi. fig. 1 (1896). 



Goolis Mountains in Somaliland (E. Lort Phillips). In British 

 Museum. 



Buthus emixi Pocock. 



Butlms eminii, Pocock, Ann. Mag. Nat. Hist. (6) vi. p. 98 

 pi. i. fig. 2 (1890) ; id. op. cit. (6) xviii. p. 179 (1896). 



Loc. Aimcea in the Boian Country, 3000 ft. (A. Donaldson 

 Smith). In British Museum. 



This species and perhaps also B. polysticius may prove to be 

 subspecies of B. trilineatus Peters, described from Tete. 



The species and subspecies of Buthus mentioned above may be 

 diagnosed as follows : — 



a. Inferior lateral keels of 5th caudal segment jsosteriorly 



lobate ; inferior median keels of 2nd and 3rd with the 



granules enlarged towards the posterior end. 



a}. Carapace without distinct median, lateral, and 



post erior keels, inferior keels on 4th caudal segment 



obsolete calviceps. 



b 1 . Carapace with distinct median posterior and lateral 

 keels, the posteriors turning outwards and uniting 

 with the laterals, inferior keels on 4th caudal segment 



developed ■. occitanus. 



a 2 . Legs, chelae, and body uniformly yellow, not 

 lined with black ; intercarinal ocular area closely 



granular subsp. zeyleinsis. 



b 2 . Chelae and body with black-lined keels, femora 

 of legs distally infuscate ; patellae also infuscate 

 basally and along keels ; frontal area of carapace 

 sparsely granular in the middle subsp. berberensis. 



