Official Checklist of the Birds of Australia. II5 
G. u i MNORHINA Gray, List Gen. Birds, 37, 1840 ; o.d., Coracias tibicen. 
705 GYMNORHINA TIBICEN —BLACK-BACKED MAGPIE (747/8). 
G.2 ,46; H.92; M .483; E.A. exc. S. Vic.; S., C., W.A. (introduced N.Z.). 
Coracias tibicen Latham, Index Orn. Sup., 27, 1801 ; N.S.W., Sydney. 
a O. longirostris Milligan, Emu, 3, 96, 1903 ; Mid-W.A., Ashburton R. 
b Cracticus t. lerraz-regiti'B M. t Nov. Zool., 372, 1912 ; N.Q., Bartle Frere. 
c C. t. intermissus M., ib . ; C.N.Vic., Bendigo, 
d O. t. finki M., A.A.R., 2, 100, 1914 ; C.A., Finke R. 
e G. t. eylandlensis H. L. White, Emu, 21, 163, 1922 ; N.T., Groote Eylandt. 
706 GYMNORHINA DORSALIS.—WESTERN MAGPIE (749). 
M. 483; S.W.A. 
G. dorsalis Campbell, P.R.S. Vic., 7, 206, 1894 ; S.W.A. 
707 GYMNORHINA HYPOLEUCAt.—WHITE-BACKED MAGPIE. (750/1). 
G. 2, 47/8 ; H. 93/4 ; M. 483 ; S. Vic., S.A., C.A., T., intro. N.Z. 
Cracticus hypoleucus Gould, Synopsis B. of A., 4 , 1837 ; T. 
a G . leuconota Gould, B. of A., 2, 47, 1844 ; S.A. 
b G. organicum G., B. of A., 2, 4S, 1847 ; new name for C. hypoleucus . 
o C . h. intermediusM.., Nov. Zool., 18, 373, 1912 ; N.S.W., Cooma. 
t O. hypoleuca fa referable to the Lesser White-backed Magpie of Tasmania. There appear to me 
good reasons why the mainland bird ( O. leuconota) should be a separate species.—A. J. Campbell. 
