1885.] DURING THE VOYAGE OF THE YACHT ' MARCHESA.' 259 



streaked with black ; beneath, the breast and flanks are lightly barred 

 with grey. 



Iris brown; bill and tarsus black. Length 17"5-1P'0 centims. ; 

 wing 9"2-9*4 centims. These skins agree with those of Bornean 

 origin. The representative L. leucopygialis of Celebes differs only in 

 having the back and rump pure white. This species appears to 

 frequent the jungle only. 



23. Pericrocotus MARCHESS, sp. nov. (Plate XVIII. fig. 1.) 



S . Superne nitide niger ; dorso inferiore, uropygio et supra- 

 caudalibus late aurant'iaco-fiavis : alls nigris, tectricum majoruin 

 apicibus, et secundariis basin versus, fiavis, speculum alare 

 viagnum formantibus ; primariis intimis versus basin, et secunda- 

 riis intimis versus apicem, pogonio exteriori flavo ornatis ; 

 subalaribus Jlavis ; cauda nigra, rectricibus centralibus omnino 

 nigris, reliquis ad basin nigris, sed Jlavo gradatim terminatis ; 

 pileo, capitis lateribus, menio gulaque nigris ; corpore reliquo 

 subtus late aurantiaco-Jlavo ; iride brunnea ; rostro et pedibus 

 nigris. 

 Long. tot. 0-168'"-0-173" ; al. 0-076"-0-078"' ; caud. 0086"; 

 rostr. a-Qiy ; ^ars. O-OH". 

 Hab. Insula " Sulu " dicta. 



a, b. S • Maimbun, Sulu Island, May 15th, 1883. 

 But two examples of this beautiful new species were obtained, 

 and no others were observed during the 'Marchesa's' visit to the 

 Archipelago. They were shot at the edge of some thick jungle in 

 the south of the island of Sulu. 



24. Chibia pectoralis (Wallace). 



Bicrurus pectoralis. Wall. P. Z. S. 1862, pp. 335, 342 ; Finsch, 

 Neu-Guinea, p. 170. 



Ohibia borneensis, Sharpe, P. Z. S. 1879, p. 246. 



Chibia pectoralis, Sharpe, Cat. B, iii. p. 240. 



Hab. Sulla Islands {Wallace) ; Obi group (Bruijn) ; Sulu 

 {Guillemard) . 



a-c. S • Maimbun, Sulu Island. 



d, e. 2 ' Maimbun and Parang, Sulu Island. 

 f. (In moult), Sulu Island. 



Iris crimson lake ; in a, an apparently old male, it is reddish 

 brown. Bill and tarsus black. Length circa 28"0 centims. ; wing 

 ]4'8-15"6 centims. 



These individuals differ a good deal in the size, colouring, and 

 distribution of the metallic spots on the head and throat, and these 

 characteristics can therefore be no guide whatever to the identification 

 of the species. The frontal tuft of silky plumes appears only to be 

 acquired by old adults. Three of the present series, two of them 

 being females and the third of undetermined sex, are entirely 

 destitute of it. I have examined the type of Mr. Sharpe's C. 

 borneensis, described in P. Z. S. 1879, and do not regard it as 

 specifically separable from the present bird. The frontal plumes 



