772 



STUDY OF THE ODONATA OF TASMANIA, 



only in Tasmania). From the point of view of this paper, S. tas- 

 manica must clearly be reckoned as the Tasmanian portion of S. 

 eustalacta. Counting, therefore, these two forms as two races of 

 one species, list B will contain nineteen species. 



I propose to give these two lists in full, and then to draw what 

 appear to be very obvious conclusions from them : — 



List A. — Species which have never been known to breed in 

 still water (except Austrogomphus guerini occasionally). * present, 

 — absent. 



Name. 



Diphlebia lesto'ides Selys 

 Argiolestes icteromelas Selys 

 Argiolestes griseus Selys 

 Synlestes weyersi Selys ... 

 Austrolestes cingulatus IJurm. .. 

 Nososticta solida Selys ... 

 Isosticta simplex Martin 

 Austrogomphus guerini Pvamb.... 

 Austrogomphus ochraceus Selys 

 Austrogomphus heteroclitus Selys 

 Austroceschna, n.sp. 

 Austroceschna longissima Martin 

 A ustrocBschna unicornis Martin 

 Austroceschna tripunctata Martin 

 Austroceschna sagittata Martin... 

 Austroceschna parvistigma Selys 

 Austroceschna multipunctata Martin 

 Austroceschna atrata M artin 

 ^Eschna brevistyla Ramb. 

 Metathemis guttata Selys 

 Metathemis brevistyla Selys 

 Metathemis virgula Selys 

 Hemicordulia australice Ramb. 

 D ] iplacodes hcematodes Burm. ... 



Total present in Southern Victoria ... ... 22 



Total present in Tasmania ... ... ... 5 



Total common to both ... ... ... 3 



Percentage of Tasmanian to S. Victorian forms, 22*7%. 



