306 ME. It. I. POCOCK ON SCOEPIONS 



■with funestus, but I am not aware that lie ever compared the 

 type or even a topotype oifunestus with australis, and since he is 

 of opinion, with Kraepelia, that citrinus and lilycus are co- 

 specific, his statement about the identity between australis and 

 funestus must be taken cum grano sails. 



Peiontjeus libycus, Hempr. Sf Elirenb. 



Prionurus libycus, Hempr. ^ Ehrenb. Verh. nat. Fr. Berlin, i. p. 357 

 (1829); iid. Symb. Phys., Zool., Scorpiones, no. 8, pi. ii. fig. 1. 



Prionurus melanophysa, iid. ibid. no. 11, pi. ii. fig. 8 (young). 



Ehrenberg gives as the locality for this form " on the Libyan 

 shore between Alexandria and Siwa, and the mountains of Sinai/' 

 Dr. Anderson sent home a long series of forms from Mersa 

 Matroo, 150 miles west of Alexandria, also examples from the 

 Pyramids and Abbasiyeh. Amongst those from Mersa Matroo 

 are examples of all ages and both sexes, ranging in length from 

 about 25 to 95 mm. But in addition to those obtained by Dr. 

 Anderson, the British Museum has others ticketed Egypt, making 

 in all a total of 28 specimens. 



In the young the whole animal is flayous, with the exception 

 of the poison-vesicle, the 5th segment of the tail, and the lower 

 part of the 4th segment, which are a deep blackish green. 

 "With growth their blackness gradually fades away ; but it never 

 appears to die out altogether, and in some apparently adult 

 examples it is still yery manifest. The hands of the chelae are 

 at all ages perfectly clear yellow, a character which forms one 

 of the best features for distinguishing this subspecies from the 

 Algerian, to which Koch has given the two na,mes priamus and 

 hector, and in which the hands (and fingers in part) in the young, 

 and even in many large examples, are deep blackish green. 



Of this Algerian form pria/mus the British Museum has 37 

 examples from the following localities in Algeria and Tunisia, 

 namely, Algiers, Duirat, Tuggurt, Biskra, and Tunis. Most of 

 these are adult or half-grown specimens, but amongst the series 

 of 12 from Biskra are examples ranging from 22 to 102 mm. 



Peioktieus ciTEiis^us, Hempr. Sf Wirenb. 



Prionurus citrinus, Hempr. §■ Ehrenb. Verh. nat. Freunde Berlin, i. 

 p. 356 (1829) ; iid. Symb. Phys., Scorpiones, no. 6, pi. ii. fig. 2. 



Of this form Ehrenberg says " not uncommon in Upper Egypt 

 and Dongola." Dr. Anderson has brought back specimens from 

 the following localities: — Cairo, Amarna, S.W. Bank of the Suez 

 Canal, Eayum, Assouan (1st cataract), and "Wadi-TIalfa (2nd 



