529 



ODONATA, PLANIPENNIA, AND TRICHOPTERA 



FROM LORD HOWE AND NORFOLK 



ISLANDS. 



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

 Maclkay Fellow of thk Society in Zoology. 



(With ten Text-figures.) 



The small but interesting collection of Odonata, Planipennia, 

 and Trichoptera dealt with in this paper was made by Mr. A. 

 M. Lea, F.E.S., Entomologist to the South Australian Museum. 

 Mr. Lea collected on Norfolk Lsland from November 23rd to 

 December 7th, 1915, and on Lord Howe Island from December 

 10th, 1915, to January 17th, 1916. I have to thank Mr. E. R. 

 Waite, F.L.S., Director of the South Australian Museum, for 

 the opportunity of studying this collection, 



I am not able to accept the record of this collection, in the 

 three Orders here dealt with, as in any probability at all a com- 

 plete one. The result from Lord Howe Island is particularly 

 disappointing, only two Planipennia, and no Odonata or Tri- 

 choptera being recorded. Probably the amount of permanent 

 fresh- water on the Island is not sufficient to allow of the exist- 

 ence of many species of the last two Orders; but, at any rate, 

 the flora is rich, and the Island would appear to be well suited 

 to the existence of Planipennia. It is, indeed, remai'kable that 

 one of the two species recorded should belong to the purely Aus- 

 tralian family Nymph'idie. A dweller in dense scrub, both in 

 the larval and imaginal states, this insect flies very little; so that 

 it would not be easy to explain its presence on the Island, unless 

 it had come there originally from Australia, via some lost land- 

 coiniection. The family is a very ancient one, and the Lord 

 Howe Island species appears to be quite Unlike the known Aus- 



