MYRIOPODA FROM BURMA 807 



The three species of the genus may be recognised thus : 



a. The dorsal surface variegated with black or brown and fla- 



vous, there being a distinct median Havous band, with a 



black one on each side of it. 



a' The median dorsal band forming a stripe of tolerably uni- 

 form thickness, but not so sharply defiued and vanishing 

 on the anterior terga blcnlor. 



Ò' The median dorsal band very clearly defined throughout 

 the body and visible on the anterior tergi te ; it takes the 

 form, however, of a series of blotches owing to the widening 

 of the spots on the middle of each half of the segments . vittatus 



b. The dorsal surface, except for the tlavous keels, a uniform 



chocolate brown nigrescens 



Genus Ortlioniorpha, Bollman 



Bull. United States Nat. Mus. No. 16, pag. 159 (in note) and p. 196, 18'J3. 



The late Mr. Bollman rightly proposed a new name to replace 

 the preoccupied Paradestnus of Saussure. In the list that he gives 

 of the species of this genus occurs the name 0. karschii, which 

 is suggested for the species whicji he supposed Karsch wrongly 

 identified as Paradesmus gracilis. With regard to this I may 

 add that the specific name karschii is preoccupied in the genus 

 for a form mentioned below ; but that I do not think a new 

 name should be proposed to supplant it, when the species me- 

 rely rests upon a figure published by Dr. Karsch. 



The Burmese species referred to this genus seem themselves 

 to be divisible, into several sections, which will perhaps ulti- 

 mately prove to be of generic value — for instance 0. hisukata 

 and 0. coxisternus stand alone ; and coarctala and pilifera seem 

 to go together. Moreover the species resembling miranda in 

 having longitudinally coloured stripes, including also in all pro- 

 bability minlana and the species I described some three years 

 back under the name crucifera, are nearly related; while karschii 

 and its allies insularis, oatesii, gestri etc. constitute another 

 section ; and lastly come doriae and silvestris^ which differ from 

 karschii and miranda in the nature of the sexual features of 

 the male. 



