BY H. J. TlLLYARt) 459 



ages of the second segment. What their function is to-day, or 

 has been in the past, we do not yet know. But we must repeat 

 that they are never well-developed except in those males with 

 angulated hindwings, and are seldom at all present in the females, 

 or in males with rounded hindwings. In Archipefalid, they 

 certainly bear the same relationship, in size and position, to the 

 hindwings that the balancers or halteres of a Dipterous insect 

 bear to the fore wings; so that there is a presumption of a similar 

 function in both cases. Watching the effect on the flight, of 

 careful amputation of one or both of the auricles, might solve this 

 problem — an experiment I hope to carry out in the future. 



It should be borne in mind that practically no collecting in 

 the Spring of the year has as yet been done either upon Mount 

 Kosciusko and the other high elevations in >South-Eastern Aus- 

 tralia, or upon similar ground in New Zealand. The possibility 

 of the existence of a new species in the former region seems to 

 me to be very considerable. On the BJue Mountains, Aastro- 

 petalia patricia appears in October, and is always completely 

 o\er by the end of November; so that it woukl probably be 

 necessary to visit Kosciusko as early as the end of November to 

 be successful. The chances of discovery in New Zealand are 

 more remote, since any species that might exist there should 

 remain out until the end of December, at any rate; and miglit, 

 therefore, be expected to have been found already, by collectors 

 in suitable localities, at that time of the year. 

 Tribe Brachytronini. 

 Genus T E L E p H L E B I A Selys. 

 2. Telephlebia tkvoni, n.sp. (Plate xxiii., tigs.3-4). 



(^. Total length, 69"5; abdomen, 55; foreioiiuj, 13; hiitdwliKj, 

 41 unn. 



AV i n g s densely reticulated, fairly broad, very rounded at 

 tips; fore wing distinctly shorter than hind wing. Venation very 

 pale brownish, costa pale yellow. Ftprosfupna very long, 5*5 mm., 

 pale ochreous, well braced, covering about ten small cellules. A 

 brownish cloud at base of wings extends up to arculus, chiefly in 



