. Catalogue of the Birds in the British Museum. 1. GEOCrCHLA. 147 1. GEOCICHLA. „ Type. Geocichla, Kuhl (reference unknown *) G. interpres. Zoothera, J'i,/ors, P. Z. S. 1831, p. 172 G. monticola. Oieoc-incla, Gould, P. Z. S. 1837, p. 145 G. varia. Turdulus, Hodffs. Gray's Zool. Miscell. p. 83 (1844) . G. wardii. Cichlopasser, Bp. Compt. Rend. xxx\-iii. p. 6 (1854) . G terrestiis. Chaniiehbis, Ht-ine, Juiini. Oni. 1859, p. 425 G. compsomita. Psophociclila, Cah. Journ. Orn. 1860, p. 182 G. Wing of Geocichla varia. The genus Geocichla comprises a well-defined group of forty Thrushes,
. Catalogue of the Birds in the British Museum. 1. GEOCrCHLA. 147 1. GEOCICHLA. „ Type. Geocichla, Kuhl (reference unknown *) G. interpres. Zoothera, J'i,/ors, P. Z. S. 1831, p. 172 G. monticola. Oieoc-incla, Gould, P. Z. S. 1837, p. 145 G. varia. Turdulus, Hodffs. Gray's Zool. Miscell. p. 83 (1844) . G. wardii. Cichlopasser, Bp. Compt. Rend. xxx\-iii. p. 6 (1854) . G terrestiis. Chaniiehbis, Ht-ine, Juiini. Oni. 1859, p. 425 G. compsomita. Psophociclila, Cah. Journ. Orn. 1860, p. 182 G. Wing of Geocichla varia. The genus Geocichla comprises a well-defined group of forty Thrushes, which may be distinguished as Ground-Thrushes. They are characterized by having the basal portion of the outside web of all the secondaries and of many of the primaries white, occasionally tinted with buff, but abruptly defined from the brown of the rest of the Cjuills. The axiUaries are parti-coloured, the basal half being white, and the terminal half black, slate-grey, or brown. Most of the uuder wing-coverts are similarly parti-coloured, but the relative position of the colours is reversed, the white portion being on the terminal half. This genus is connected with the genus Turdtts through T. viscivoriis and T. musfelimis. In the former the base of the inner webs of most of the quills is white, but gradually shading into, and not abruptly defined from, the brown of the rest of the quills; the axillaries and under wing-coverts are pure, white. In the latter the axillaries have brown centres, and the under wing-coverts brown bases. These two genera are also connected by the aberrant species of the genus Geocichla. Of these the most aberrant are G. .^imensis and G. litsit.'iinqia, which have the axillaries and under wing-coverts uniform in colour; but the pale portions of the inner webs of the quills are greatly developed and very abruptly defined. G. jyinicola is also slightly aberrant in having the axillaries a uniform white. 8o far as I have been able to ascertain, the you
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