PLATE XL VII A. 



NoTHRUS BiOAEiNATUS. (Page 514.) Length about 



•75 mm. 



Fig. 1. Adult. X 65. 



2. Adult ; chela of mandible. X 400. 



3. Adult; rostrum from above. X 145. 



4. Adult ; pseudo-stigma and pseudo-stigmatic 



organ. X 400. 



5. Adult; 4th leg. X 145. 



NoTHRUS BivEKRUCATDS. (Page 510.) Length about 



•1 mm. 



6. Adult. X 55. 



7. Adult; right mandible from without. X 180. 



8. Adult ; pseudo-stigma and pseudo-stigmatic 



organ, X 400. These include the portions 

 within the body seen in optical, longitudinal, 

 median section ; (o) external pseudo-stigmatic 

 organ ; (o^) portion of peduncle of same 

 within the body ; (s) external pseudo-stigma ; 

 (s^) portion of same within the body ; {ch) 

 section of the chitinous cuticle of the cephalo- 

 thorax ; (??/) nerve. 



9. Adult ; central portion of tlie posterior margin 



of the abdomen. X 180. 



10. Adult ; 2nd leg from within. X 100. 



NoTHRUS Targtonii. (Page 488.) Length about "83 



mm. 



11. Adult. X 65. 



NoTHRUs INVENUSTUS. (Page 500.) Length about '66 



mm. 



12. Adult. X 65. 



