Paras. 1:5 



Lip region bearing 6 or 7 annulesj tail cylindrical, bluntly 

 rounded 10 



10. Lip sclerotization heavy, conspicuous magnicauda (Thome) 



Lip sclerotization faint, inconspicuous 11 



11. Tail less th^in 3 x anal body diameter parvus n. sj> 



Tail more than 3 x anal body diameter maximus n. spi 



12. Lip region continuous with body contour 13 



Lip region set off by constriction or depression 18 



13. Lip region bearing 2 aimules nudus n. sp 



Lip bearing more than 2 annules 111 



Ik. Lip sclerotization faint, inconspicuous 15 



Lip sclerotization strong, conspicuous 16 



15. Tail bearing 10 to 15 annules clarus n. sp. 



Tail bearing 20 to 2? annules striatus n. sp. 



16. Spear less than 20 ji long manubriatus Litvinova 



Spear more than 20 yi long . 17 



17. Spear not more than 31 ii long, tail bearing SO annules 



kegenicus Litvinova 



Spear more than 31 V long, tail bearing kS annules 



galeatus Litvinova 



18. Spear more than 20 ji long, lips rounded, sclerotization con- 

 spicuous cyllndricus Cobb 



Spear less than 20 \l long, lips broadly rounded, sclerotization 

 faint latus n. sp. 



