Like the _Myzantha garrula_ it is of a prying and inquisitive disposition, and the whole troop may be easily brought within the range of observation by uttering any kind of harsh squeaking note, when they will descend to ascertain the cause, and look around with the utmost curiosity. Its flight is of the same skimming motionless kind as that of the Garrulous Honey-eater; and upon some given signal the whole flock, or the greater portion of it, fly off simultaneously and descend to some neighbouring branch in a cluster. The whole of the plumage, with the exception of the primaries and secondaries, yellowish olive, but the under surface much paler than the upper; forehead, stripe from the angle of the lower mandible, ring encircling and dilated into a spot above the eye, black; ear-coverts olive-brown; primaries and secondaries dark brown, the former margined with grey and the latter with yellowish olive; bill fine yellow; tarsi and toes fine orange-yellow; eye dark leaden brown; eyelash leaden grey; bare space below and behind the eye orange-red. The Plate represents a male and a female of the natural size on a plant gathered in the brushes of Illawarra. [Illustration: ZOSTEROPS DORSALIS: _Vig. & Horsf._ _J. Gould and H. C. Richter del et lith._ _C. Hullmandel Imp._ ] ZOSTEROPS DORSALIS, _Vig. & Horsf._ Grey-backed Zosterops. _Certhia cœralescens_, Lath. Ind. Orn. Supp., p. xxxviii. _L’Heorotaire bleu_, Vieill. Ois. dor., tom. ii. p. 121. pl. 83? _Bluish-breasted Creeper_, Shaw, Gen. Zool., vol. viii. p. 244. _Cœrulean Creeper_, Lath. Gen. Syn. Supp., vol. ii. p. 188. _Cœrulean Honey-eater_, Lath. Gen. Hist., vol. iv. p. 204. _Sylvia lateralis_, Lath. Ind. Orn. Supp., p. lv. _Rusty-side Warbler_, Lath. Gen. Syn. Supp., vol. ii. p. 250.—Shaw Gen. Zool., vol. x. p. 659.—Lath. Gen. Hist., vol. vii. p. 140. _Certhia diluta_, Shaw, Gen. Zool., vol. viii. p. 244. _Philedon cœruleus_, Cuv. _Meliphaga cœrulea_, Steph. Cont. of Shaw’s Gen. Zool., vol. xiv. p. 264. _Sylvia annulosa_, var. Β, Swains. Zool. Ill. 1st Ser., pl. 16. _Zosterops dorsalis_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 235. _White-eye_, Colonists of New South Wales.