312 Mr. R. I. Pocock on the 



much thicker and scarcely longer ; pectines longer ; oper- 

 culum divided in both sexes. 



Distribution. Tropical and temperate countries. 



Genera : Prionurus, Hempr. & Ehrenb. ; Buthus, Leach ; 

 Parabuthus, Pocock (syn. Heterobutkus, Kraep.) ; 

 Grosjihus, Sim. ; Butheolus, Sim. (syn. Orthochirus^ 

 Karsch) ; Archisometrus^ Kraep. ; Isometroides^ Keys. ; 

 UroplecteSy Pet. (?syn. Lepreus, Thor., and Tityo- 

 lepreus, Kraep.); Tityobuthus*^ gen. nov. ; Pseudo- 

 buthuSy nom. nov.f; Isometrus, Hempr. & Ehrenb. j 

 Tityus, C. Koch ; Centrums^ Hempr. & Ehrenb. ; 

 HeteroctenuSy Pocock; Ananteris, Thor.; Charmus^ 

 Karsch ; Heterocharmus ^ Pocock ; Stenochirus^ Karsch. 



In many respects this family, like the preceding, shows 

 signs of relationship with the lurini. One of the genera 

 even — Charmus — was referred by its author to the latter sub- 

 family of the Pandinidse. 



A few of the above genera are unknown to me and others 

 I have not attempted to locate. 



Timogenes and Thestylus are referred to the BothriuridfB on 

 the authority of Simon (Ann. Soc. Ent. Fr. 1880, p. 392 &c.). 



Megacormus . — This genus was established by Karsch in 

 Arch. Naturgeschichte, 1881, p. 17, for a species named 

 granosus by Gervais. It was compared by Karsch to Uro- 

 dacus. Possibly it belongs to the Chactini, but nothing is 

 known respecting the armature of its feet. 



Belisarius, Sim. (Arach. de France, vol. vii.), referred to 

 the Ischnurida3, should perhaps constitute a distinct family or 

 subfamily. 



HopJocystiSy of which there is a single species, scintilla^ was 

 characterized by Karsch (Abh. nat. Ver. Bremen, ix. p. 69, 

 1884), and was referred by its author to the lurini. I would 

 suggest, however, that it may be one of the Buthidee. The 

 locality is unknown. 



loctonns of Thorell, from Australia, I have questionably 

 united with Urodacusj principally relying upon the locality 



* For Rhojjti-wns Baroni, Pocock, from Madagascar, differing from 

 Ehoptrurns, i. e. Fsciidobuthus, at least in having a spur ou the tibia? of 

 the legs of the third pair. 



t For Bhoptrurus, Karsch, preoccupied by Peters for a snake. 



