73 



22. Key to the species of Uropoda Latr. 



!Mediau dorsal shield ornated with chit- 

 inous ridges 2. 

 Median dorsal shield without such ridges 4. 

 iAuterior part of abdoraen simulates a 

 cephalothorax U. berlesiana Berl. 

 No siraulatiou of cephalothorax . . 3. 

 !Two suboval spaces on dorsum joined 

 by a rnedian line U. festiva Berl. 

 No such arrangement U. laminosa Can. 



!Anterior margin with chitinous mem- 

 brane 5. 

 No such membranes 6. 



Body subpyriform; membranes extend- 



!ing to legs 4 U. canestriniana Berl. 

 Body broad-oval ; membranes entending 



to legs 2 U. cristiceps Can. 



i Dorsum concave ; margins upward . U. carinata Berl. 

 ' Dorsum convex ; margins not upward 7. 



!Anal shield distinct, separate from 

 ventral shield 8. 

 Anal shield fnsed with ventral shield 11. 

 Sternal shield posteriorly denticulate; 



anal shield crescent-shaped ... 9. 

 o { 



Sternal shield indistinct, or posteriorly 



not denticulate 10. 



t Dorsal shield hairy U. paradoxa Can. et B. 



< Dorsal shield hairless U. pusilla Berl. 



(Anal shield small, sub-semicircular . U. obovata Can. et B. 

 10] 



' Anal shield large, crescent-shaped . U. elimata Berl. 



(With posterior dorsal shield . . .12. 

 (Without posterior dorsal shield . .13. 



! Posterior dorsal shield small; body hairy U. obscura (C. L. Koch). 

 Posterior dorsal shield crescent-shaped ; 

 body hairless U. tecta Kram. 



