THE VICTORIAN NATURALIST. 



Wings alike in shape, eyes projecting 

 and more widely separated. The 

 triangle of the wings becomes a quad- 

 rangle 



Ante-cubital nervures more or less 

 numerous between the base and 

 nodus of the wings, between the 

 costa and the median 

 Ante cubital nervures always two 

 only, between the costa and sub- 

 costa, before the nodus 



III. — Agrionid^e. 



6. Calopteryginse. 



7. Agrioninse. 



The following are the known Australian genera, with notes on 

 some of the species : — 



FAMILY I.— LIBELLULIM:. 



Sub-family 



-LlBELLULIN^E. 



Genus. 



Tholymis 

 Pantala 



Tramea 



Rhyothemis 



Neurothemis 



DlPLAX ... 



Trithemis 

 Tetrathemis 



Orthetrum 



Agrionoptera 

 Neoxenia 



Brachymesia 



Nannodiplax 

 Nannodythemis ... 



One species only, Tholymis tillarga. 



One species only, Pantala flavescens. Very 

 common. 



Four or five Australian species. 



Three or four Australian species. 



N. fluctuans, N. oculata, and N. oligoneura. 



D. melanopsis, D. bipunctata, D. rubra, 

 D. hsematodes. 



Much resembles Diplax, but the ante- 

 cubital nervures are more numerous. 



Resembles Trithemis, but the triangle of 

 the upper wings has four sides, and 

 becomes a quadrangle instead of a 

 triangle. 



Four or five species of fairly large size, red 

 or blue. O. caledonicum received from 

 Mr. Billinghurst, old male blue, female 

 yellowish. O. oblitum is red, the 

 female yellow. The other species are 

 also yellow, brown, or red, same size, 

 or else yellow spotted with black. 



Several species. 



Resembles Agrionoptera, but species 

 smaller. 



Resembles Agrionoptera, but species 

 smaller. 



Very small size. 



Very small size, triangle becomes 

 rangle. 



quad- 



