724 THE DRAGONFLIES OF SOUTH-WESTERN AUSTRALIA, 



R. australice. The frontal spots are possibly less brilliant, and 

 more greenish than blue, but this may be due to the age of the 

 specimens I took. The males can be distinguished at once by 

 the superior appendages. Those of H. australioi are fairly long, 

 somewhat curved, tips pointed, and carry underneath, about their 

 middle, a sharp black spine, easily seen with the naked eye. 

 Those of P. affinis are, however, very short, much arched, almost 

 forcipate, but with the tips slightly recurved; they carry ?io spi7ie 

 underneath, and are only half the length of those of 11. australice. 

 Besides this, the males of the genus Hemicordulia have the anal 

 margin of the hindwings rounded, while ProcorduUa has it very 

 slightly, but distinctly, angulated. The females of both species 

 have rounded anal margins to their hindwings, and are exceed- 

 ingly difficult to distinguish. P. affinis female has a slightly 

 longer membranule and appendages, 



11. Synthemis macrostiGxMa Selys. 



Sparingly at Bridgetown; abundant at Wilgarrup. The males 

 outnumber the females by tw^enty to one. I was fortunate in 

 obtaining two mature females at Wilgarrup, where the males 

 were so common in marshy places that two could be caught with 

 one sweep of the net. This insect is rather rare and local. It 

 was first recorded from Fiji, but I have since taken it in New^ 

 South Wales on the Blue Mountains, and have received one male 

 from Mount Macedon, Victoria. The Western Australian form 

 is considerably smaller than the eastern form. It is a beautiful 

 insect, very slender and graceful, of a rich cinnamon-brown colour, 

 profusely marked with beautiful cream-coloured spots in pairs. 

 There are no bands on the upper part of the thorax, but on each 

 side there is a round spot and a short band, both cream-coloured. 



12. Synthemis cyanitincta, n.sp. 



(Plate XXXV. figs. 3-4; Plate xxxvi. fig, 1). 



This beautiful little species is exceedingly rare. I took it 

 sparingly in one locality at Margaret River, and I also found one 

 very damaged female at Armadale. It is easy to capture,, 



