EXPLANATION OF PLATE X. 



Isotoma minima n. sp. 



Fig. 



1. Right eye patch and post-antennal organ 



Isotoma bidenticula n. sp. 



2. Furcula 



3. Mucrones 



4. Right eye patch and post-antennal organ 



Isotoma fimetaria (L.), Tullb. 



5. Foot 



6. Furcula 



Isotoma quadrioculata Tullb. 



7. Right eye patch and post-antennal organ 



8. Foot 



Achorutes schneideri Schaff. 



9. Antenna. 



10. Posterior abdominal segments 



11. Furcula 



12. Dentes and mucrones 



Achorutes boletivorus Pack. 



13. Antenna 



14. Furcula 



Achorutes longispinus Tullb. 



15. Posterior abdominal segments 



1 6. Anal horn 



Achorutes schbtti Reut. 



17. Posterior abdominal segments 



1 8. Furcula 



19. Dentes and mucrones 



Achorutes socialis Uzel. 



20. Anal horn 



21. Posterior abdominal segments 



22. Furcula 



23. End of furcula 



