120 ORIGIN, ETC., OF THE FAUNA. 
Order SCORPIONES *. 
The genera of this order recorded from Central America may be classified, with 
their distribution, as follows :— 
Family ScorPionipz. 
Subfamily Ischnurine. 
Genus Opisthacanthus. Panama, Colombia, W. Indies. 
Subfamily Diplocentrine. 
Genus Diplocentrus. Texas, Mexico, W. Indies, Brazil. 
Family Vasovip2. 
Subfamily Vejovine. 
Genus Hadrurus. S. States of N. America ; Mexico, ? Guatemala. 
Genus Vejovis. 8S. States of N. America; Mexico. 
(Genus Uroctonus. California; ? Guatemala.) 
(Genus Anuroctonus. California, Utah, etc. ; ? Guatemala.) 
Subfamily Megacormine. 
Genus Megacormus. Mexico. 
Genus Plesiochactas. Mexico. 
Subfamily Chactinz. 
Genus Broteochactas. Panama, Guiana. 
Family Buruipz. 
Genus Centruroides. S. States of N. America, Central America, Antilles, S. America. 
(Genus Rhopalurus. Cuba, Haiti, Brazil, ? Mexico.) 
Genus Jityus. Mexico, Costa Rica, Panama, W. Indies, S. America. 
(Genus Isometrus. Commercially imported, if present.) 
With the substitution of the older name Vejovide for Iuride and the introduction 
of the Megacormine, containing genera unknown to me at the time, this is the 
classification proposed by myself in 1893 (Ann. Mag. Nat. Hist. (6) xii. pp. 305-311) 
- and adopted in my paper on ‘“‘ The Geographical Distribution of Scorpions” in 1894 
(Nat. Science, v. pp. 353-364). In his contribution to the same subject published in 
1905 (Zool. Jahrb. Syst. xxii. pp. 321-364), Kraepelin suggested certain modifications, 
erecting the Diplocentrine, Vejovine, and Chactine to full family rank, including the 
Megacormine as a subfamily of the Chactide, and making Centruroides, with 
Rhopalurus, and Tityus, the types of separate subfamilies of the Buthide. These 
amplifications, whether desirable or not, are of no importance in the present 
connection. 
Some of the genera above enumerated have been placed in brackets because 
e 
* Although it is customary to designate the primary divisions of the Arachnida as “ Orders,” it must be 
remembered that the morphological differences between the groups 0 of that rank are greater than those which 
distinguish the ‘‘ Classes” of the Vertebrata. : : 
