762 COLLECTION OF DRAGONFLIES FROM CENTRAL AUSTRALIA, 



SO abundantly along the coast of the Northern Territory and 

 Queensland have altogether failed to establish themselves any 

 distance inland, owing to the altered conditions of climate. 



Of the ten species in the collection, two are new and exceed- 

 ingly interesting forms. One of these is the type of a new and 

 remarkable genus. Of the remaining eight, one is the cosmo- 

 politan Pantala flavescens Fabr., which appears to be very scarce; 

 the other seven are species which are common over the whole of 

 Australia. 



The following is an analysis of the three hundred and twenty 

 specimens which I have examined : — 



Name. 



Pantala flavescens Fabr 



Diplacodes hoematodes Burm 



,, hipiinctata 'Qva.xxer 



Orthetrum caledonicum Brauer, .. 



Hemicordidia tau Selys 



Hemianax papuensis Burm 



Lestes aridtis, n.sp. 



Austrosticta Fieldi, n.sp 



I^chnura delicata Selys 



Xanthagrion erythronenrum Selyi 



Total 



Males. Females, Total. 



2 

 43 



3 

 34 



4 





 81 



3 

 16 

 15 



201 



2 



53 

 

 2 

 

 1 



30 

 2 



19 



10 



119 



4 



96 



3 



36 



4 



1 



111 



5 



35 



25 



320 



There were also several nymphs of Ischnura delicata. 



Wings: fore 22mm. 



Lestes aridus, n.sp. 



(Plate xlii., figs. 4-5.) 



(J. Total length 41mm., abdomen 32mm. 

 hind 21 mm. 



Wings: Neuration black; pterostiyma 1 -3 mm., dark brown. 

 9-10 Head: Eyes dark brown; occiput 

 8-9 pale transverse line about 1 mm, long, 

 slightly enlarged on each side, where it meets the eye, into a 

 small oval spot; epicraniurn black; ocelli black, each surrounded 

 by a conspicuous pale brownish ring; antennce black, a very pale 



Nodal Indicator 

 marked with a 



