









. 





. ■ . 



■ 



■ 











■ 





■ 

 ■ 





- 



■ 



■ 



■ 

 ■ 



■ 





■ 



■ 



. 







. 



■ 



■ ' 



ARACHNIDA— SCORPIONES. 



■ 







PLATE VIII. 



Fig. 1. Centruroides limbatus> Poc, $ 



1 a, carapace. 

 2. Centruroides nigrescens, Poc., ? 



Talamanca 



Mexico 



3. Centruroides nigrescens, Poc, <?, nat. size, typical example from Xautipa, Mexico 



3 a, lateral view of posterior end of tail. 



4. Centruroides fi 



Poc. $ , nat. 



size, typical example from Xautipa, Mexico: 



4 a, movable digit of chela, to show the nine median rows of teeth characteristic 

 of the gracilis-gvouip of Centruroides. 



5. Rhopalurus junceus, Herbst, ? , nat. size, specimen ticketed " Mexico" in Mus. Brit.: 



5 a, sternum of cephalothorax (at.), genital operculum (g.), pectines (pect.), and first 

 abdominal sternum (st.abd.) showing the deep grooves running forwards from the inner 

 extremity of the stigmata (to compare with the same structures in Centruroides 

 Plate VII. fig. 1 a) . 













■ 





























: 



■ ■ ■ 



. ■ ; 





. 



* 



■ 



■ 



■ 



L 











' 



L 



. 











; ; 



■ 







