554 DESCRIPTIONS OF NEW SPECIES OF AUSTROGOMPHUS. 



It is difficult to indicate any special affinities which these three 

 species possess with other members of the genus. All the species 

 are very closely related, and this has led M. Rene Martin to 

 include them all under the one genus Austrogomphus, which now 

 contains both the Austrogomphus and Hemigomphus of former 

 writers. A. pi-asinus seems to be the least closely allied to the 

 others, and it is the only one whose colours are not pure yellow 

 and black; but I cannot see any characteristic which would 

 warrant its forming the type of a new genus. 



EXPLANATION OF PLATE XXXIV. 



Y'lg.l.— Austrogomphus arhustoriim, n.sp.; <^ appendages. 

 Fig. 2. — ,, arenarius, n.sp.; J^ appendages. 



Fig. 3. — ,, prasinus, n.sp.; <? appendages. 



A. Dorsal view. B. Lateral view 



