38 ARACHNOIDEA, 



CASE Some of the narrow yellow species, with slender long pincers, form 

 the genus Androctonus, signifying in Greek *' Man-killer," and 

 other genera, Ischnm-us, Brotheas, Opistophthalmus,Va5Jovis, &c., 

 have been established on the shape of the cephalothorax, the 

 number and position of the eyes, the characters of the tail (as 

 square, or round, &c.), and the form of the back. 



Vsejovis, sp. (natural size). 



j^Qg^ Androctonus {Sp.), from Rangoon. — 5. Newly-born specimens {3) ; 6. En- 

 5, 6. larged figure of do. 



No. 7. Androctonus priamus (^Koch) (?), from Java. — 7. Specimens of do. 



No. 8. Androctonus {Sp.), from East Indies. — 8. Specimen of do. (i). 



No. 9. Buthus {Sp.) from the Cape. — 9. Specimens of do. (2). 



This probably should form another genus. 



No. 10. Buthus c^sar {Koch), from the East Indies. — 10. Specimens of do, (2). 



No. II. Buthus afer {Koch), from East Indies.— 11. Specimen of do. (i). 



No. 12. Buthus imperator {Koch). — 12. Figure natural size, copied from Koch's 

 Araneidge. 



This is the largest species we have seen described. It is at 

 least six inches in length ; but it seems nothing but an unusually 

 large immature specimen of B. afer. 



