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ON SOME NEW DRAGONFLIES FROM AUSTRALIA 

 AND TASMANIA [Order Odonata]. 



By R. J. TiLLYARD, M.A., B.Sc, F.L.S., F.E.S., Linnean 

 Macleay Fellow of the Society in Zoology. 



(Plate xxiii., and ten Text-figures.) 



During the past t^vo or three years, some interesting new 

 material in the Order Odonata has accumulated in my collections. 

 Pressure of more important ^vork has hitherto prevented me from 

 working this up; but it seems time that this task should be 

 undertaken at last, and the descriptions are now offered in this 

 paper. 



Two new genera are here proposed, and eight new species de- 

 scribed, together with one new subspecies. Besides these, the 

 female and mature male of the very rare species, Arc/ioles/es chry- 

 so'ides Tillyard, are described for the first time, the species having 

 been originally described from a unique male, which subsequently 

 proved to be somewhat immature, and not fully coloured. 



The most interesting of the species dealt with' in this paper are 

 two forms from Cradle Mountain, N.W. Tasmania, taken at an 

 altitude of about 4,000 feet, in a very cold and wet climate. 

 Two new genera are proposed for their reception. They are 

 undoubtedly Antarctic derivatives, linking up the fauna of Tas- 

 mania (and, incidentally, of the south-eastern highlands of Aus- 

 tralia) with the fauna of the Andean slopes in Southern Chili. 

 One of them, Archipetalia anriculata^ n.g. et sp., is probably the 

 most archaic .(^schnine Dragonfly yet discovered, and appears to 

 represent a type ancestral, in many of its characters, to Austro- 

 petalia of the Blue Mountains on the one hand, and to the three 

 Chilian genera Petalia^ PhyUopetalia^ and Hyj^opetalia on the 

 other. These five genera, forming the tribe Petaliini, are a very 

 distinct group, evidently of great age, but so specialised in several 



