MYRIOPODA FROM RURMA 795 



Family POLYDESMIDAE 



The Burmese genera may be recognised as follows: 



a. The whole of the dorsal surface completely co- 



vered with close-set squamifonn setiferous 



tubercles Eadasypeltis, iiov. 



b. The dorsal surface not covered with tubercles 



and setae, 

 a' Tergites furnished with two transverse rows 



of piliferous tubercles; keel of the 1'^^ elevated Prionopeltis, nov. 

 6' Tergites without rows of tubercles in front 

 and behind. 



a* Keel of the 2"^ tergite high, practically on 

 a level with those of the 1=* and 3^^ . tail 



slender and subcylindrical Anoplodesmus, nov. 



6* Keel of the 2"'^ tergite low, below the line 



of those of the 1^* and S^^ ; tail stouter at 



the base, more triangular. 



a^ In the posterior half of the body the 



sternal areas are strongly dentate, an 



acute spine lying at the base of each leg 



(ex. on the 18*^ ) Tetracentrosternus^ nov 



b^ All the sternal areas unarmed, 

 a* Tubercles on the anal sternite long 

 and cylindrical far surpassing the poste- 

 rior edge Trogodesmus, uov. 



Ò* Tubercles on the anal sternite short , 

 barely surpassing the boi'der. 

 a^ Body with very small linear keels 

 which have no posterior angle; seg- 

 ments of legs more subequal, the 

 femur not twice the length of the 



tibia Strongylosoma, Brandt. 



6* Keels at least with a prominent, 

 acute posterior angle ; femur the 

 longest segment of the leg, not shorter 

 than the tarsus and twice as long as 

 the tibia Orthomorpha, Bollman. 



