This bulbul was common in the cocoa at the Cocoa Research Station. It fed in the company of other bulbuls in shade trees (_Trema orientalis_). The size of the testes of the males taken is characteristic of the beginning or ending of the breeding season, but ovaries of the females showed no signs of being in breeding condition. According to Smythies (1960:385), this species had never been taken in North Borneo. These specimens, therefore, are the first recorded from there. Specimens previously were saved from Sarawak and Indonesian Borneo. _=Hypsipetes criniger viridis=_ (Bonaparte): Hairy-backed Bulbul.--_Specimens_, 26: Cocoa Research Station: [Male], September 26, 1962, MCT 2963; [Female], September 27, 1962, MCT 2971; [Female], November 27, 1962, MCT 3337; [Male], November 27, 1962, MCT 3356; [Female], July 7, 1963, ADG 169; [Male], June 14, 1963, ADG 139; [Male], June 12, 1963, ADG 125. 12 mi. N Kalabakan: [Female], October 13, 1962, MCT 3022; [Male], October 13, 1962, MCT 3023; [Female], October 13, 1962, MCT 3029; [Female], October 13, 1962, MCT 3033; [Male], October 14, 1962, MCT 3040; [Female], October 16, 1962, MCT 3054; [Male], October 16, 1962, MCT 3055; [Female], October 19, 1962, MCT 3081; [Female], October 19, 1962, MCT 3082; [Male], October 20, 1962, MCT 3109; [Male], October 22, 1962, MCT 3129; [Male], October 26, 1962, MCT 3162; [Male], November 11, 1962, MCT 3251; [Female], November 13, 1962, MCT 3273; [Female], November 13, 1962, MCT 3274; [Male], November 13, 1962, MCT 3275. Gum-Gum: [Female], October 3, 1963, ADG 288; [Male], October 3, 1963, ADG 289; [Male], August 12, 1963, ADG 228. These bulbuls regularly feed on berries of _Trema orientalis_. I saw these bulbuls darting out after insects from branches, much as flycatchers would do, and have noticed a tendency toward flycatching in other bulbuls, but not so commonly as in this species. In using the name _Hypsipetes_ instead of _Microscelis_ I follow Rand and Rabor (1959:102). _=Hypsipetes malaccensis=_ Blyth: Streaked Bulbul.--_Specimens_, 4: Cocoa Research Station: [Male] testis 8 x 5 mm., 41.0 gm., August 20, 1962, MCT 2787. 12 mi. N Kalabakan: [Female], October 19, 1962, MCT 3092. 5.5 mi. SW Tenom: [Male], December 22, 1962, MCT 3497; [Male], December 22, 1962, MCT 3498. I did not find this species common at any collecting locality. Smythies (1957:707) considered it a lowland species, but its occasional occurrence in the highlands is indicated by the specimen from Tenom. Deignan (_in_ Peters, 1960:291) regards _Hypsipetes virescens_ and _Hypsipetes malaccensis_ as specifically distinct.