CHIBIA. 707 



722. CHIBIA WORCESTER I McGregor. 



WORCESTER'S DRONGO. 



Chibia worcesteri McGregor, Bur. Govt. Laboratories (1905), 34, 26; 

 McGregor and Worcester. Hand-List (1906), 107. 



Semirara ( Worcester ) . 



Male. — Similar to Chibia cuyensis and to C. palawanensis, but with 

 the outermost rectrices more recurved than in either of these ; wing longer 

 than in C. cuyensis; bill longer and deeper than in C. palawanensis. 

 The type and only specimen measures: Length, 292; wing, 150; tail, 

 136; bill from nostril, 22; depth of bill at nostril, 11; tarsus, 24; dif- 

 ference in length between the middle and outermost rectrices, 20. 



723. CHIBIA BORNEENSIS Sharpe. 

 BORNEAN DRONGO. 



Chibia borneensis Sharpe, Proc. Zool. Soc. (1879), 246; Worcester and 

 Bourns, Proc. U. S. Nat. Mus. Wash. (1898), 20, 558, no. 298: Mc- 

 Gregor and Worcester, Hand-List (1906), 107. 



Chibia pectoralis Guillemard, Proc. Zool. Soc. (1885), 259, 418. 



Chibia cagayanensis Mearns, Proc. U. S. Nat. Mus. (1909), 36, 447.* 



Bongao (Everett) ; Cagayan Sulu {Guillemard, Mearns) ; Sibutu {Everett) ; 

 Tawi Tawi {Bourns d Worcester). Borneo. 



Similar to C. pectoralis (Sula Island), "but it may be recognized on 

 comparison by the much smaller and more metallic spots on ths throat 

 and fore neck, which are steel-green, as also are the neck-hackles. In 

 C, pectoralis the spangles are large, dull, and inclined to purplish in 

 tint. This species appears to me to be a thorough Chibia. * * *." 

 (Sharpe.) 



"The young bird from Kina Balu differs from the adult in being 

 duller black, with fewer and less metallic chest-spots and hackles." 

 (Sharpe.) i 



* This recently published description is based upon one specimen and the species 

 is compared with neither Chibia borneensis nor C. pectoralis. Mearns's description 

 follows : 



"Characters. — Very similar to Chibia palaicanensis, differing only in its 

 somewhat larger size, shallower forking of the tail, the narrower and very much 

 smaller spangles on the breast, and in the absence of metallic green on the upper 

 tail-coverts. 



"Measurements of skin (type and only specimen). — Length, 260; wing, 136; 

 tail, 126; emargination of tail, 16; culmen (chord), 28.5; tarsus, 24.5." {Mearns.) 



t The description of Chibia borneensis follows: "C. similis C. pectorali ex insulis 

 Sulaensibus, sed plumis lanceolatis colli lateralis metallice chalybeo-viridibus nee 

 purpurascentibus, et maculis jugularibus ct praepectoralibus valde minoribus et 

 conspicue metallicis chalybeo-viridibus distinguenda. T>ong. tot. 10, culm. 1.3, 

 alae 5.9, caudae, 4.5, tarsi 0.85." {Sharpe.) 



