300 ME. E. I. POCOCK OK THE SCOEEIOIfS 



Androetonus macrocentrus, iid. op, cit, p. 355 ; Symb. Phys., Scorp. 

 pi. i. fig. 6. 



Androetonus thebanus, iid. op. cit. p. 358; Symb. Phys., Scorp. pi. i. fig. 4. 



Buthus arenicola, Simon, Expl. Sci. de la Tunisie, Arachnides, p. 51 

 (1885). 



Loc. Duroor, 60 miles north of Suakin ; S."W. Bank of 

 Suez Canal (4 specimens). 



I have compared examples of B. arenicola from Biskra with 

 the Egyptian forms of B. leptochelys, and I feel sure that the 

 two are identical. 



Buthus acute-caeinatus, Simon. 



Buthus acute-carinatus, Simon, Ann. Mus. Genova, xviii. p. 245, pi. viii. 

 fig. 18 (1883); also Thorell, Bull. Sac. Ent.Ital. xxv. pt. 4, p. 360 (1894). 



Loc. Duroor, 60 miles north of Suakin. 



From this locality four § specimens were obtained, the length 

 of the largest being about 36 mm. In these the anterior edge 

 of the carapace and the keels on the carapace and terga are 

 infuscate, as well as the anterior two-thirds of the 5th caudal 

 segment and the inferior keels of the 4th. Moreover the crests 

 on the legs and palpi are for the most part lightly infuscate. 

 In this particular these Duroor examples differ markedly from 

 three $ specimens obtained at Thebes by Mr. Carter, which are a 

 clear lemon-yellow throughout, the three ocular clusters being 

 alone of a dense black. All the other examples of this species 

 in the British Museum, namely 2 from Perim Island, 2 from 

 Zaila in Soraaliland, and 8 from Aden, agree substantially with 

 those mentioned above from Duroor. It is worth mentioning, 

 however, perhaps that two young examples (about 20 mm.) from 

 Aden have the trunk and appendages rather deeply infuscate, 

 and the black ring on the anterior half of the 5th caudal segment 

 very deep and sharply defined. 



[I here subjoin the descriptions of two species of Scorpions, 

 closely allied to Buthus dimidiatus, which have been recently 

 sent to the British Museum. 



Buthus Jatakaei, sp. n. (PI. IX. figs. 2, 2 a.) 

 Colour. Anterior half of carapace greenish black, the rest of 

 the trunk, with the exception of the keels and granules which 

 are blackish, pale ; the first two segments of the tail pale above 

 and below, the keels only being blackish, the 3fd segment 

 becoming infuscate, the 4th, 5th, and vesicle entirely blackish 



