530 ODONATA, <kc., FROM LORD HOWK AND KOKFOLK 1 SLAKt)S, 



tralian species. These two facts suggest that it reached the 

 Island a very long time ago. 



With regard to Norfolk Island, the collection is a mure ex- 

 tensive one, containing two species of Odonata, nine of Plani- 

 pennia, and one of Trichoptera. The most striking feature here 

 is the abundance of Chrysopidce, of which seven species, appa- 

 rently all new to science, were obtained. None of the species 

 are the same as any known Australian species; so that the sup- 

 position, that these insects have been imported into the Island 

 with Citrus fruit-trees, cannot be entertained. It seems much 

 more likely that there is a large, indigenous, Chrysopid fauna in 

 connection with the Norfolk Island Pine, Araucaria excelsa, 

 since many Chrysopids are known to frequent the trees of this 

 genus. 



It is noteworthy that not a single species was found common 

 to both Islands. The two Dragonflies from Norfolk Island are 

 both found in the Kermadecs, and also in Australia, but are not 

 known from New Zealand. The Caddis-fly is a common Aus- 

 tralian species. 



Of the Planipeiinia, all those already known to science are 

 Australian species, the fauna showing a marked resemblance to 

 that of Southern Queensland. The occurrence of the very rare 

 and tiny Hemerobiid, Carohius pulchellus Banks, is noteworthy, 

 since this is another very weak and inert species, which could 

 scarcely have reached Norfolk Island except by means of some 

 definite land-connection in the past. The forms of Drepanacra 

 found on Norfolk island are dwarfed, and difi'er from both Aus- 

 tralian and New Zealand forms sufficiently to merit new names. 

 Insects of this genus would certainly not be transported by 

 winds or storms, and must, like Carohius, be reckoned as definite 

 evidence of a former land-connection between the Island and 

 Australia. 



The following is a list of the species in the collection : — 

 Older ODONATA. 

 Family LIBELLULII)^. 

 Subfamily C o r d u l i i x .e 

 (1) Heniicordulia australue Kamb. Norfolk Island. 



