BY P.. J. TILLYAED. 



167 



The followiog is a complete ILst of the genera and species 



studies] : — 



This list comprises thirteen genera (properly foarteen, since 

 Austrogomphus heteroclitus Selys, is not congeneric with A. 

 ochraceus Selys), and nineteen species. It is fortunate that the 

 CoiduUince are so well represented in Australia, since the prin- 

 cipal changes in the anal area of the wing take place in this 

 subfamily. 



In his remarks on the anal trachea ( A >, Xeedham ( /oc. ri/., 

 p. 721 ; points out that it fuses with the cabitas(Cu) close to the 

 base, and later on branches away from it. This fusion was seen 

 in all Anisoptera examined by him. It occurs also in all the 

 forms which I have examined: so that we may be fairly certain 

 that it is as universal an occurrence as the fusion of the radius 

 with the media. 



The very great importance of this basal fasion of Cm and A, 

 and its bearing on the imaginal wing- venation, seems to have 



