532 ODONATA, &C., FROM LORD HOAVE ANt> NORFOLK ISLANDS, 



this species ranges along the Eastern Coast from Victoiia to 

 Queensland, becoming darker as it goes north. The Norfolk 

 Island form closely resembles the specimens found round Sydney 

 and northwards to Queensland. 



2. ISCHNURA AURORA Br. 



This tiny and very beautiful Dragonfly is evidently abundant 

 on Norfolk Island, the collection containing 39 males and three 

 females. Of the latter, one is the rare homochrome form (colour. 

 ation as in the male); this form has only so far been recorded 

 from Western Australia and the Northern Territory. The other 

 two are the common heterochrome (black) form. The insect is 

 abundant all over Australia, but does not occur in New Zealand. 



PLANIPENNIA. 



Family HEMEROBIID^. 



3. Drepanacra instabilis (McLach.) insularis, n.subsp. 



Differs from the type-form in its small size (forewing 6-5 mm. 

 long by 3'6 mm wide), and in its general resemblance to D. 

 humilis McLach. The Radial Formula is 2+1 + 1+1 + 1+ 3 = 

 9, as in the type form. Fore wings distinctly falcate, with four 

 small lunulesnot very well formed; costal area exceedingly broad 

 at base. 



Head, thorax, and ahdoineii brown: atitennoi and If^gs paler 

 brown. Fo7'e?ciag pale transparent brownish, with veiy indis 

 tinct transverse irroration of darker browri; a small hyaline 

 area on the median fork: fenestella very small and indistinct. 

 Hindtvhuj very pale, almost hyaline, very slightly clouded along 

 posterior margin to Cuj,,. 



Type in Coll. South Australian Museum, Adelaide. Cotype 

 in Coll. Tillyard. 



Two specimens from Norfolk Island. 



4. Drepanacra norfolkensis, n.sp. 



Forewing well pointed, but not at all falcate, G-5-7*5 mm. long 

 by about o'O mm. wide. Radial Formula 3 -i- 1 + 1 + 1 + 3 = 9, or 

 3 + 1 + 1 + 1 + 1+2 = 9; costal area excessivelv broad at base, so 



