Whether it remains during the whole of the year, or is a migratory bird like the common species, I was not able to learn; for although Mr. Charles Coxen had previously informed me of the existence of such a Halcyon on the Namoi, he could give me no further account of it. Crown of the head dull green, intermingled with white, giving it a striated appearance: a broad black stripe commences at the base of the bill, passes through the eye, and encircles the back of the head; upper part of the back and scapularies green; remainder of the wings bluish green; lower part of the back, rump, and upper tail-coverts red; tail green, tinged with blue; throat, a broad collar encircling the back of the neck, and all the under surface white; bill black, the base of the lower mandible flesh-white; irides blackish brown; feet dark olive-brown. The figure is of the natural size. [Illustration: HALCYON SORDIDUS: _Gould_. _J. Gould and H. C. Richter del et lith._ _Hullmandel & Walton Imp._ ] HALCYON SORDIDUS, _Gould_. Sordid Halcyon. _Halcyon sordidus_, Gould in Proc. of Zool. Soc., Part X. p. 72. I possess two specimens of this species of _Halcyon_, which were killed by Mr. Bynoe on the north coast of Australia; unfortunately they were unaccompanied by any information respecting their habits and economy; they appear to be fully adult, and equal in size the _Halcyon collaris_,—a species, which, although said to be Australian, I have no authentic evidence of its ever having been killed therein. Head, back, scapularies and wing-coverts brownish oil-green; wings greenish blue, gradually changing into green on the tips of the tertiaries; collar round the back of the neck and all the under surface buffy white; tail greenish blue; upper mandible and tip of the lower one black; base of the latter flesh-white. The figures are of the natural size. [Illustration: HALCYON MACLEAYII: _Jard. & Selb._ _J. Gould and H. C. Richter del et lith._ _C. Hullmandel Imp._ ] HALCYON MACLEAYII, _Jard. & Selb._ MacLeay’s Halcyon. _Halcyon MacLeayii_, Jard. and Selb. Ill. Orn., vol. iii. pl. 101. _Halcyon incinctus_, Gould in Proc. of Zool. Soc., Part V. p. 142, female. _Bush Kingfisher_, Residents at Port Essington. There certainly has not yet been discovered a more beautiful Halcyon in any part of the world than the one figured in the accompanying Plate, which has been dedicated to Mr. Alexander MacLeay by the authors of the “Illustrations of Ornithology” as a tribute of respect, in the propriety of which I entirely concur.