in the figures given by Jablousky and Olivier; 

 to the latter author we are indebed for a know- 

 ledge of the specific identity of the tityus and 

 marianus. 



The female is generally somewhat smaller 

 than the male, and unarmed, excepting a small 

 tubercle on the head. 



Tityus, in the heathen mythology, was a 

 gigantic son of Jupiter and Elara, whom Apollo 

 killed for offering violence to his mother Latona. 



The upper figure of the plate represents the 

 male, and the lower the female. 



PLATE IV. 



E 



