MYRIOPODA FROM BURMA 789 



in Tenasserim and Mr. Oates others which are ticketed S. Te- 

 nasserim. I have already described this species under the name 

 that Dr. Karsch was good enough to give me for it, after com- 

 paring specimens that were sent to him for the purpose, with 

 Peter's types in the Berlin Museum. But with all deference to 

 Dr. Karsch opinion, I am tolerably confident, altliough I have 

 not seen the original examples of Acanthodesmus pilipes , that 

 this Tenasserim species will be found to be entirely distinct 

 from the Bornean, when the two are compared by competent 

 judges. 



An interesting point connected with this species is the fact 

 that it is the most westerly representative of the genus in the 

 Oriental Region. 



Family CRYPTODESMIDAE Karsch Q) 



Mitth. Miinch. Ent. Ver. 1879, p. 143. 



The genera of this group that can I think be recognised, 

 may be tabulated as follows : 



a. Some of the keels provided with pores. 



a' Pores in the anterior half of the keels {teste 



Peters) Cryptodesmus 



Type alatas, Peters. 

 Ò' Pores in the posterior half of the keels . . Cryptodesmoides, nov. 



Type feae nov. 



b. Pores invisible. 



a^ Head covered by a laminate expansion of the 



first tergite etc Aporodesmus nov. 



Type vineentii, Poe. 

 6* Head not covered by an expansion of the first 



tergite Trichopeltis, Poe. 



Type bicolor, Poe. 



(') Both Karsch and Silvestri give as a main character of this group the absence 

 of pores. This is somewhat unfortunate in view of the fact that Peters distinctly 

 states that the typical genus of this family possesses these organs. 



