30 MR. A. R. WALLACE ON THE BIRDS OF BOURU. [Jan. 13, 



tail dusky brown ; feathers of the throat somewhat decomposed, with 

 the outer half white ; those of the breast with an elongate oval white 

 spot on each feather ; middle of the belly, the vent, and under tail- 

 coverts pale rufous ; over the eye is a silvery-white mark, only visible 

 when the feathers are raised ; the under wing- coverts are tipped with 

 pale rufous, the outer row with white ; the greater wing-coverts above 

 have the extreme apex whitish, the tertiary quills have a very narrow 

 pale-rufous edging ; the tail is immaculate, with the exception of the 

 two outer quills, which have their outer web for its whole length 

 rusty white ; bill black ; feet dusky ; iris dark. 



Length 7 inches ; wing 3| inches ; tail 3^ inches ; bill, to front, 

 i inch. 



Hab. Bouru, 



Remarks. — I have named this species after the island it inhabits, 

 because the allied forms from the surrounding islands being already 

 known, there is every probability of its never being found anywhere 

 else. 



Pachycephala lineolata. 



Pachycephala lineolata, Wallace, P. Z. S. 1862, p. 341. 



Hab. Bouru and Sula Islands. 



Pachycephala rufescens. 



Pachycephala rufescens, Wallace, P. Z. S. 1862, p. 341. 



Hab. Bouru and Sula Islands. 



Pachycephala clio. 



Pachycephala c?io, Wallace, P. Z. S. 1862, p. 341. 



Hab. Bouru and the Sula Islands. 



Remarks. — The Bouru specimens have a more yellow tinge on the 

 back, and the black pectoral band is generally broader than in those 

 from Sula. I may here observe that the fine species from Batchian 

 and Ternate, included in Mr. G. R. Gray's list of Molucca birds as 

 P. melanura, Gould, is quite distinct from that species, and may be 

 recognized by its black chin and upper tail-coverts, and narrow black 

 crescent on the breast entirely disconnected from the black head, 

 and also by its much larger size. We have therefore in the Moluccas 

 four species of Pachycephala allied to the pectoralis and melanura 

 of Australia, viz. P. macrorhyncha, Strickl., in Amboyna and Ceram, 

 P. calliope, Bp., in Timor, P. clio in Bouru and Sula, and P. men- 

 talis, n. s., in Batchian, Ternate, and Gilolo*. 



* Pachycephala mbntalis, n. s. P.flavo-olivacea ; capite, genis menfogue 

 nigris ; gula late alba ; lunula pectorali nigra ; subttis cum torque nuchaliX 

 vivideflava ; cauda ejusque tectriciius superioribus nigris ; remigibus fusco-\ 

 nigris, primariis olivaceo limbatis, aiiis teetricibusque alarum Jlavo-olivaceol 

 marginatis ; rosiro nigro, pedibus fusco-otivaceis. 

 Long. 7, alar. 3'7, caudse 2'10, poll, et duodecim. 

 Hab. Ins. Batchian et Gilolo. 

 This may be Tardus armillaris, Temm., or Lanius eucullatus, Licht. (Bp. Consp. 

 p. 328) ; but I can find no descriptions of those species, and therefore give this 

 bird a name descriptive of a peculiarity confined to it. Laniarius albicollis, VieilL, 

 is different from this and apparently from any other described species. 



