BY R. J. TILLYARD. 729 



transversely; a pair of larger roundish anal spots slightly more 

 separated; on either side, low down, a basal spot and a smaller 

 central spot. These spots vary in size from 3-8, the central dorsal 

 spots increasing to 7 and the anal ones flattening down to mere 

 lines in 7-8, the sublateral spots approaching more closely together 

 from 3-8; 9-10 shaded anally with pale green on either side of 

 dorsal ridge. Appendages: Superior nearly 4 mm., wide 

 apart at bases, converging and sometimes touching near tips; 

 narrow sublanceolate, tips blunt and rounded, inner margin with 

 a row of long soft hairs; black. Inferior narrow triangular, just 

 over half as long as superior; tips slightly upcurved; concave 

 above, marginate; colour semitransparent brown, margins darker. 

 {See Plate lxviii., figs. 3e?-36). 



9. Generally slightly larger than g, differing from it as follows. 

 Abdomen stouter than in £; 10 very short above, rounded below 

 anally and projecting between appendages. Ovipositor furnished 

 with two jointed filaments, basal joints thickened. Behind these, 

 on 10, is a small tubercle carrying several minute teeth or spines. 

 Appendages 1 mm., wide apart, parallel, subcylindrical, rather 

 blunt, black. 



Hab — N. S.W. : Illawarra district, National Park, Mittagong, 

 etc.; local; March-May. 



In March it (lies high up about the bushes and trees around 

 the mountain creeks; later on in the season it may also be seen 

 flying swiftly, low over the water, especially towards evening. 

 A difficult insect to capture. 



The genus Caliaeschna, to which this new species belongs, 

 contains but few species; and, with this exception, is confined to 

 India, Afghanistan, and Asia Minor. It is therefore a somewhat 

 remarkable discovery to find an isolated species of the genus so 

 far removed from its centre, and with so local a distribution. 

 The genus can be distinguished 1 from the other Australian 

 Aeschnine genera, Planaeschna, Austroaeschna and Acaidhaeschna, 

 by the fact that in these genera the basilar space of all the wings 

 is free, while in Caliaeschna it is reticulated. 

 59 



