_=Stachyris erythroptera bicolor=_ (Blyth): Red-winged Tree Babbler.--_Specimens_, 11: Cocoa Research Station: [Male] testis 2 x 1 mm., 13.4 gm., July 24, 1962, MCT 2654; [Female] imm., 13.0 gm., August 28, 1962, MCT 2832; [Female], 12.5 gm., August 28, 1962, MCT 2833; [Male], December 2, 1962, MCT 3432; [Female], December 2, 1962, MCT 3433. 12 mi. N Kalabakan: [Male], October 10, 1962, MCT 2995; [Male], November 6, 1962, MCT 3215; [Male], November 7, 1962, MCT 3218. 5.5 mi. SW Tenom: [Male] testis 3 x 1 mm., December 18, 1962, MCT 3463. Ulu Balung Cocoa Estate: [Male], July 10, 1963, ADG 184; [Male], July 17, 1963, ADG 206. This species was seen most often in primary forest undergrowth, but occasionally as high as 10 feet up in small trees. I saw it also in and around brush piles in secondary forest. The one specimen from 5.5 mi. SW Tenom was taken in the moss forest. MCT 2833 was in heavy molt on the wings, head, and body. _=Stachyris rufifrons sarawacensis=_ Chasen: Hume's Tree Babbler.--_Specimen_, 1: Cocoa Research Station: [Male] testis 4 x 3 mm., November 28, 1962, MCT 3358. There was no comparative material in the U. S. National Museum where I studied the specimen but it fits Chasen's original description of _S. r. sarawacensis_. H. G. Deignan (_in_ Peters _et al._, 1964:303) considered this subspecies doubtfully distinct from _S. r. poliogaster_. The specimen was taken at a height of one and one-half feet in a mist net set along a path. The bird was caught when it attempted to cross the path from a patch of heavy undergrowth to a patch on the other side. Mary Norman observed them at Kalabakan (Smythies, 1963:281) in saplings. They should probably be considered birds of the understory. _=Alcippe brunneicauda=_ (Salvadori): Brown Quaker Babbler.--_Specimens_, 22: Cocoa Research Station: [Male] imm., 14.4 gm., August 20, 1962, MCT 2781; [Female], 14.9 gm., September 6, 1962, MCT 2877; [Female], September 25, 1962, MCT 2957; [Female], November 28, 1962, MCT 3361; [Female], November 28, 1962, MCT 3362; [Male], November 28, 1962, MCT 3376; [Male], November 28, 1962, MCT 3378; [Male] testis 5 x 3 mm., December 1, 1962, MCT 3410; [Male], December 2, 1962, MCT 3435; [Male], November 30, 1962, MCT 3440; [Male], November 30, 1962, MCT 3441. 12 mi. N Kalabakan: sex?, November 1, 1962, MCT 3194; [Male], November 11, 1962, MCT 3243; [Male], November 11, 1962, MCT 3245; [Male], November 11, 1962, MCT 3247; [Male], November 11, 1962, MCT 3248; [Male], November 12, 1962, MCT 3261; [Female], November 13, 1962, MCT 3267; [Female], November 10, 1962, MCT 3306. 5.5 mi. SW Tenom: [Female], December 22, 1962, MCT 3501; [Female], December 22, 1962, MCT 3502; [Female], December 22, 1962, MCT 3503.