512 
Birds of Celebes: Turdidae. 
GENUS PETROPHILA Sw. 
These Rock-thrushes differ from Merula in having a straight wing, not 
incurved to fit the body, and black feet and tarsi, whereas in Merula they are 
generally yeUow or brown. The males of PetmpMa have much blue in their 
plumage, the females are not spotted below, but marked with irregularly shaped 
bars. IVIr. Oates separates the typical Rock-thrush, MonUcola, from PetropMa 
in virtue of the short tail, the wing of the former being double the tail-length. 
211. PETROPHILA OYANUS (L.). 
Blue Rock-thrush. 
The investigations of Dresser (Birds Eur. 11, 1872, 150 163), Hume (Str. 
Feath 1875 IH, 112—114), Seebohm (Cat. Birds V, 1881, 316 320), Oates (B. 
Brit. Burmah 1883 I, 11), Fauna Br. Ind. Birds 1890, H, 146, 147), 
(Ztschi-. ges. Orn. 1886, 99 and Ornis 1888, 603), Styan (Ibis 1887, 217; 1891, 
334), and others, satisfactorily prove that this species embraces two remarkably 
diffeknt extreme geographical races, which are inseparably connected with one 
another by intermediate forms. They are; 
1. The typical Petrophila cyanus. 
For syonymy cf Seebohm 1. c. 
Diagnosis. Abdomen blue, like the rest of the plumage. 
Distribution. Prom S. Europe, east to China, migrating in winter to North Africa, India, 
Ceylon, Burmah. 
2, Petrophila cyanus solitaria (P. L. S. Miill.). 
«. Mo«ac.la .oUtarta. (P. L. 8. M.); (H Wald., Tr. Z. 8. 18y, WU, ''Ca 
S. 1875, IX, 192; (3) Briigg., Abh. Ver. Bremen 1876, V, 66, (4) Salvad., Ann. 
Mus. Civ. Gen. 1876, IX, 59; (V) David & Oust., Ois. Clmie 1877, 161, pi. 41 ; 
Wald., P. Z. S. 1877, 696; (6) id., ib. 1878, M3, 380, 619, 949; (7) Blak. & 
Fryer, Ibis 1878, 240; (8) Salvad., Om. Pap. H, 1881, 418; (9) Seeb., Cat. B.> 
V 1881, 319; (10) A. Mull., J. f. 0. 1882, 357; (11) H. Slat., Ibis 1883, 224; (12) 
W Bias., Ztschr. ges. Orn. 1886, 99; (13) Styan, Ibis 1887, 217; (14) Sharpe, 
Ibis 1888, 201; (14^>^) Tacz., P. Z. S. 1888, 463; (15) W. Bias., Oimis 1888, 603; 
(16) Sharpe, Ibis 1889, 269; (17) Everett, J. Str. Br. E. A. S. 1889, 98; (18) 
Whitehead, Ibis 1890, 58; (19) Steere, List B. & M. Philipp. Is. 1890, 19; (20) 
Salvad., Om. Pap. Agg. 1890, 137; (21) Styan, Ibis 1891, 333; ^ Hartert, 
T f O 1891 201; (23) Tacz., Faun. Orn. Sib. Orient. I, 1891, 321, (24) De La 
Touche, Ibis 189^413; Styan, Ibis 1893, 427; (2^) M. & Wg J. f. 0^1894 
247; (27) Grant, Ibis 1894, 509; (28) Bourns & Worces., B. Menage Exped. 
1894 40; (29) Everett, Ibis 1895, 23. 
b. Petrocossyphus solitarius (1) Sh. & Dress., B. Em’. H, 4^0— lOy 1 )• 
c. Cyanoeincla solitaria (7) Hume, Str. F. 1875, HI, 112; (2) Hume & Dav., ib. VI, 1878, 
250, 512. 
d. Petrocincla manilla (Bodd.) (1) Tacz., B. Soc. Z. France 1879, 136. 
e. Monticola saxatilis (1) H. Slat, (nec L.), Ibis 1882, 433; 
