y forest. The two birds from 12 miles north of
Kalabakan were taken in a net stretched across a surveyor's
transect. The net was set on a hilltop and the birds hit it
approximately three feet above the ground. Two of the specimens
from the Cocoa Research Station are in juvenal plumage, indicating
that this species probably breeds in the area.

_=Cettia whiteheadi=_ (Sharpe): Short-tailed Bush Warbler.--_Specimen_,
1: 5.5 mi. SW Tenom: [Male] testis 3 x 2 mm., December 21, 1962, MCT
3488.

The specimen was netted in the moss forest, in fairly heavy
secondary undergrowth.

_=Prinia flaviventris=_ (Delessert): Yellow-bellied Wren-Warbler.--On
September 2, 1962, I saw several of these wren-warblers in a grassy area
near the golf course at Tawau.

_=Acrocephalus arundinaceus orientalis=_ (Temminck and Schlegel): Great
Reed Warbler.--_Specimens_, 6: Tenom: [Female], December 31, 1962, MCT
3546; [Male], January 1, 1963, MCT 3555; [Male], January 2, 1963, MCT
3565; [Female], January 4, 1963, MCT 3575; [Female], January 3, 1963,
MCT 3574; [Male], January 4, 1963, MCT 3579.

This species was common in the old paddy near Tenom, which has now
grown up to grass and shrubs. I saw one individual also in
shrubbery in Jesselton.

_=Phylloscopus borealis=_ (Blasius): Arctic Leaf Warbler.--I saw this
leaf warbler once in dense scrub in the moss forest near Tenom.

_=Seicercus superciliaris schwaneri=_ (Blyth): White-throated Flycatcher
Warbler.--_Specimens_, 2: 5.5 mi. SW Tenom: [Male] testis 4 x 2 mm.,
December 23, 1962, MCT 3510; [Female], December 23, 1962, MCT 3511.

In the moss forest this was a common bird that hopped about in the
climbing bamboo and scrub.

_=Orthotomus atrogularis humphreysi=_ Chasen and Kloss: Black-necked
Tailorbird.--_Specimens_, 5: Cocoa Research Station: [Male] testis 4 x 2
mm., 6.5 gm., August 28, 1962, MCT 2827; [Female] oviduct enlarged,
brood patch, 5.5 gm., August 28, 1962, MCT 2828; [Male] testis 4 x 2
mm., September 26, 1962, MCT 2967; [Female], November 27, 1962, MCT
3336; [Female], November 28, 1962, MCT 3375.

These birds lived in the secondary forest-edge in dense shrubbery.
They were breeding at a time when most other birds seemed to have
completed breeding activities; most had begun the post-breeding
(prealternate) molt. On October 3, 1962, I saw two adults with two
young in nondescript juvenal plumag