BY K. J. TILLYAUD. 769 



C. Post-Isthmian. — The period from the final submergence of 

 the Isthmus to the present day (Fig. 3). 



In the summer of 1908-9, I spent a month collecting Odonata in 

 Tasmania, and obtained fairly comprehensive collections from 

 many localities in the north, north-east, centre and south of the 



Fig. 2. —Isthmian. 



island. Though dragonflies were fairly numerous, the number of 

 species obtained (nineteen) was surprisingly small. 



Since then, I have received small collections from the west coast 

 and from Ben Lomond, also a very complete collection from Mr. 

 F. M. Littler, taken in various localities around Launceston and 



