Birds of Celebes: Campophagidae. 4]^ 3 



The plumage of G. hicolor appears to present another remarkable example 

 (see also Loricnhis, Hierococcyx crassirostris, Coradas etc.) of the influence of 

 light on the coloration. Seen from above with its wings naturally folded the 

 male is black, the female slate-grey, below both are white, the female having 

 also the throat and chest slate-grey as above. The lower back, rump and upper 

 tail-coverts, concealed by the wings, are white like the under surface. No stress 

 would be laid upon this, were it not that the black tail-feathers are also white 

 where they are hidden by the tail-coverts. Further, the wings below, where 

 they rest upon the sides of the body and rump, are white, while the free, more 

 exposed ends of the quills are blackish grey. 



In Graucalus leucopyqius, it may however be added, the lining of the quills, 

 but not the basal part of the tail-feathers, is white; in Artamus both are white, 

 though expressed less well than in G. hicolor. Perhaps others will try an ex- 

 planation of this obvious disposition of pigment. 



The bird seems to moult in August — September, no doubt after breeding, 

 but an immature bird killed in May is also moulting. 



* 155. GRAUCALUS LEUCOPYGIUS Bp. 



Celebesian Grey Cuckoo-shrike. 

 Plate XXI. 



Graucalus leucopygius (1) Bp., Consp. 1850, I, 354; (2) Hartl., J. f. 0. 1864, 443; (3) 

 Wald., Tr. Z. S. 1872, VKI, 68; (4) Salvad., Ann. Mus. Civ. Gen. 1875, Vn, 657; 

 (5) Briiggem., Abh. Ver.^Bremen 1876, V, 71; (6) Lenz, J. f. 0. 1877, 374; (7) 

 Sharpe, Mtth. Z. Mus. Dresden 1878, ni, 365; (8) id., Oat. B. IV, 1879, 33; (9) 

 Meyer, Ibis 1879, 129, 146; (10) W. Bias., J. f. O. 1883, 137; (11) Meyer, Isis, 

 Dresden 1884, 6; (12) W. Bias., Ztschr. ges. Orn. 1885, 280; (13) Guillem., P. Z. 

 S. 1885, 553; (14) W. Bias., Omis 1888, 581; (15) Tristr., Cat. Coll. B. J889, 185; 

 (Xri) Meyer, Abb. v. Vogelskel. I, 1892, 40, pi. CLXVI; (17) Biittik., Zool. Erg. 

 Weber's Eeise Ost-Ind. 1893, HI, 278; (18) M. & Wg., Abb. Mus. Dresden 1895, 

 Nr. 8, p. 9; (19) iid., ib. 1896, Nr. 1, p. 10; (20) iid., ib. 1896, Nr. 2, p. 14; (21) 

 Hart., Nov. Zool. 1896, 156; (22) id., ib 1897, 158, 162. 



a. Campephaga leucopygia (1) Finsch, Neu Guinea 1866, 172; (2) Gray, HL. 1869, I, 



336, Nr. 5074; (3) Rosenb., Mai. Ai-cMp. 1878, 273. 



b. Coracina leucopygia (1) Heine'"& Rchw., Nomencl. Mus. Hein.' 1890, 69. 

 "Maspas besar", Minahassa, Nat. Coll. 



"Bnrong minia", Malay, Mnahassa, Meyer 9, Nat. Coll. 



"Konkon inewahat", Minahassa, Guillem. 13, Hickson, Nat. in N. Celebes 1889, 91. 



"Laveda", Tjamba Distr., S. Celebes, Platen 12. 



'•Sosolat daka", Tonkean, E. Celebes, Nat. Coll. 



Figure of skeleton, and descriptions. Meyer XVI; Hartlaub 2\ Briiggemann 5 (young); 

 Sharpe S; W. Blasius 12 (sexual differences). 



Adult [male]. General coloin hght slate-grey, sUghtly tinged with oHve-grey, becouiing white 

 on rump and upper tail-coverts; wings and tail black, the middle tail-feathers and 

 the wing-coverts washed with slate-grey, the quills edged with the same coloui- or a 



