126 Transactions. 



characters for discrimination in the secondary sexual structures of the $ 

 — viz., the costal fold of forewings, the folding and tufting of the dorsal 

 margin of hind wings, and the presence of hairy tufts on the abdomen. 



Sabatinca quadrijuga n. sp. 



cJ. 13 mm. Head pale-greyish. Antennae dark fuscous. Thorax 

 purplish. Abdomen grey, lateral claspers and supraanal projection longer 

 and narrower than in caustica. Forewings ovate-lanceolate, less acute than 

 in caustica. stalk of 7 and 8 extremely short ; deep purple, irregularly mixed 

 with coppery-golden, darker and bluish on costa ; four subquadrate 

 ochreous- whitish spots on costa between base and f , larger anteriorly, and a 

 dot towards apex : cilia grey-whitish, with several dark-grey bars. Hind- 

 wings violet-grey, darker towards apex ; cilia grey- whitish, on costa barred 

 with grey suffusion. 



Invercargill (Philpott) ; one specimen received through the kindness of 

 Mr. Hudson. 



Art. X. — Notes on some Dragon-flies from the Kermadec Islands. 



By R. J. Tillyard. M.A., F.E.S. 



[Bead before the Wellington Philosophical Society, 9th August. 1911. \ 



In a small collection forwarded to me by Mr. A. Hamilton, of Wellington, 

 New Zealand, five species are represented, four being species of wide 

 distribution in the Australasian region, and the fifth (represented by a 

 solitary female) probably a local race of a widely distributed oceanic 

 genus of which the species and races have not yet been correctly worked 

 out. They are the following. 



Fam. LIBELLULIDAE. 



Subfam. Libellulinae. 



1. Tramea sp., 1 $ (label No. 2). 



Somewhat immature, and of pale coloration. The dark patch at the 

 base of the hindwings is exceedingly small, and does not spread down- 

 wards into the anal areas of the wing. The male of the insect should be 

 obtained, as from the form of the $ appendages and genitalia the species 

 could be determined with certainty. I am of opinion that this will prove 

 to be a. local race of a widely distributed oceanic species. The genus 

 is highly migratory, and one species is rapidly travelling down the east 

 coast of Australia, and getting a strong hold there. 



Subfam. Corduliinae. 



2. Hemicordulia australiae Rambur (label No. 3). 



2 $, 2 <$. In good condition, a dark and handsome form, practically 

 identical in size and colouring with the specimens found in the Sydney 

 district. This beautiful species, recognizable by the brilliant metallic-green 



