738 THE DRAGOxNFLIES OP SOUTH-WESTERN AUSTRALIA, 



20. Lestes ana lis Rambur. 



Common everywhere. It is also found very abundantly in S. 

 Australia and Victoria, and fairly commonly in New South 

 Wales. A very variable insect, both in size and colouring, the 

 markings generally being pinkish, but pale blue in very mature 

 specimens. On the mountain-brooks at Armadale and Waroona, 

 a dwarf form occurs with dull g-revish markings. 



'&'■ 



21. Lestes annulosus Selys. 



Fairl}' common at Mungar's Lake, Perth; a few specimens also 

 at Bridgetown. It is also found in South Australia and in the 

 western parts of Victoria. A most beautiful species, dark bronze 

 with light blue stripes on thorax and rings on abdomen, the 

 dorsal surface appearing to have a series of dark bronze arrow- 

 heads along a blue ground. Female duller, with less blue. 

 Males much commoner than the females. 



22. Lestes io Selys. 



Widely distributed, but local and rather rare. Two males at 

 Wilgarrup, one female at Bridgetown, one at Armadale; fairly 

 common at Margaret River, but requires searching for. A rather 

 small species with very slender abdomen, bronze with narrow 

 blue rings; wings narrow and rather pointed. 



23. Lestes psyche Selys. 



Somewhat commoner than the preceding. Several at Mungar's 

 Lake, Perth; two at Armadale; fairly common at Margaret 

 River. Very similar to the preceding species, but with shorter 

 abdomen, and wider and more rounded wings. Also occurs 

 sparingly in New South Wales. 



These two species are at tirst sight exceedingly alike, but may 

 be distinguished as follows : — In the male, the second segment 

 of the abdomen of L. io is dark bronze, or black, withont mark- 

 ings on the dorsal surface, while in L. psyche it is more or less 

 blue, the blue from the sides of the segment intruding and cutting 



