the Sj/stematia of Scorpions. 375 



There is still, however, much to learn regarding the black 

 forms of Buthus allied to B. australis and B. bicolor, and it 

 may ultimately prove that B. crassicauda and B. mauritanicus 

 are melanistic subspecies of the former. 



Thorell (Bull. Soc. Ent. Ital. xxv. p. 357^ 1894) has already 

 recorded from Tunis two examples, referred to B. australis, 

 which differ from the typical form only in being entirely 

 olive-green in colour. 



Genus Centruroides, Marx. 



Centruroides Hasethi, sp. n. 



Sjn. Centrums granosus-\-Berthol(li, Thor., Kraepolin, Das Tierr., 

 Scorpioues et Pedipalpi, p. 90 (1899) (nee Centrurus (jranosua, 

 Thor. ; nee C. Bertholdi, Thor.). 



In the ' Biologia Centrali-Americana/ Arachn. Scorp. 

 pp. 27-28, I have pointed out that the male of the scorpion 

 from Cura^oa identified by Kraepelin as C. Bertholdi, 

 Thorell, which was considered to be the male of C. granosus, 

 Thor., differs from C. Bertholdi in having no subaculear 

 tooth upon the vesicle, the carapace longer than the first 

 caudal segment, than half the length of the sum of the first and 

 second, and more than one seventh the length of the tail, and 

 in the smoothness of the upper keels of the hand ; and on p. 3.2 

 I have given reasons for regarding C granosus of Thorell as 

 based upon a small specimen of C. margaritatus, and have 

 pointed out that the female of the species from Cura9oa 

 which Kraepelin referred to C. granosus differs from that 

 species in colour and in having no subaculear tooth upon the 

 vesicle. 



The type {S) of this new species and a female, both 

 received in exchange from Dr. Kraepelin of the Hamburg 

 Museum, were collected in the island of Cura^oa. 



Their measurements in millimetres are as follows: — 

 S . Total length 66; length of carapace 6 ; of tail 44-, of its 

 first segment 5*5, second segment 6*5, fifth segment 8 ; width 

 of brachium 2, of hand 3; length of underhand 4-7, of 

 movable finger 7. 



? . Total length 71 ; carapace 7 ; tail 43, its first segment 5, 

 seconrl segment 6'3, fifth 8"3. 



For the sake of comparison I subjoin some of the measure- 

 ments of C'.i^er^/<o/^i, as given by Thorell: — Total Icngtli 79"5; 

 carapace 6*5; tail 51*5, its first segment 7, second 85, 

 filth 10-3. 



These dimensions speak for themselves when compared 

 with those of the male of C. Hasethi. 



28* 



