732 THE DRAGONFLIES OF SOUTH-WESTERN AUSTRALIA, 



This is a most remarkable species, with a coloration quite 

 different from all known Austrogomphids, which are invariably 

 black with bright yellow or greenish-3''ellow markings. There is 

 no character in the wings which would warrant the formation of 

 a new genus, though the shape of the abdomen, together with the 

 remarkable colouring, might make one pause and consider the 

 question. But the genus Austrogomphus is of itself artificial, and 

 formed for the convenience of collecting together into one group 

 all the Australian species of Gomphns; so that, until this genus 

 is scientifically treated, this new species had better remain in it. 



Subfamily ^SCHNIN^. 



16. Hemianax papuensis Burm. 



Common everywhere along the coast-line, rarer inland. It is 

 found commonly all over Australia. A large insect, abdomen 

 dull brown, mottled and marked all over with darker brown in 

 intricate pattern. The forehead carries a thick black T-mark, 

 Anal angle of hindwing of male rounded. 



17. ^SCHNA BREVISTYLA Rambur. 



Common all over the district. It is found nearly all over Aus- 

 tralia, but is either absent or exceedingly rare in the tropical 

 portion of the continent. It is a beautiful insect, of similar size 

 and shape to the preceding, but the thorax is marked with light 

 green bands, and the abdomen profusely spotted with green. In 

 many specimens the markings are bluish, and in immature speci- 

 mens they are pale, almost cream-coloured. The front carries 

 the thick black T-mark, but the anal angle of the hindwing of 

 the male is strongly angulated, a characteristic of all the 

 jEschnidce except Hemianax and Anax. Appendages of the male 

 short. 



18, AuSTROiESCHNA ANACANTHA, n.Sp. 



(Plate xxxv., figs. 7-10; Plate xxxvi., fig.4,) 



$. Total length 63-67 mm., abdomen 49-52 mm.; forewing 

 40-44 ram., hindwing 39-43 mm. 



