1. 



372 AUSTRALIAN COHDULIIN.=E, 



Martin, is synonymous with it\ we can now classify the Austra- 

 lian members of the genus Hemicordulia as follows : — 



I Front with a distinct, black T-maik above 1. 



I^Front ?<;t/Ao?(^ a distinct black T-mark above 2. 



l^Sej^nient 7 with basal half yellow, cxd straight q^ across 

 middle of segment. (Appendages of $ with a sharp 



spine) H. intermedia. 



Segment 7 metallic gieenish-blacU, with orange low 

 down on sides. (Appendages of ^ with upturned 



tips, no spine) — H. tail. 



rFiont with two distinct round yellow spots above H. svperba. 



' \Front brilliant metallic greenish above.. 3. 



I Appen 'ages of male ivith a sharp spine H. australice. 



I Appendages of male without any spine //. continentalis 



^ote. It is difficult to separate the females of H. australice and 



H. continentalis, but the latter is generally smaller, has a shorter 

 pterostigma, and slightly longer appendages than the former. 



4. Procordulia jacksoniknsis Rambur. 



This insect was, until lately, exceedingly rare in collections. 

 In the de Selys Collection there are Rambur's four types, from 

 New South Wales; and a specimen in Hagen's Collection is said 

 to come from Western Australia, though this is very doubtful. I 

 took a single female at Gisborne, Vic, in December, 1908; and was 

 agreeably surprised to find it, in swarms, on the lagoons near 

 Cressv, Tasmania, in January, 1 909. There I took about eighty 

 magnificent specimens, and also found the larva. The following 

 is a description of the Cressy series: — 



(J. Total length, 44-45; abdomen, 32-33; hindwing, 28-29 mm. 



Win^s: bases just touched with black and saffron; ptero- 

 stigma brown, 2 mm.; membrannle 4-5 mm., dark brown tipped 



with white. Nodal Indicator 

 brown, with soft grey hairs 



7-8 6 ! H e ad : eyes dark 

 5 6-7 j behind; vertex small, 



brown; front wide, somewhat depressed medially, brilliant metallic 

 green above, yellow on sides, glaucous-brownish shading to livid- 

 crey on face; cJypeiis and labrum glaucous-greyish; labium pale 

 dirtv straw-colour. T h o r a x : proihorax pale brown above, dark 

 brown on sides. Meso- and metathorax very hairy, burnished 



