The four Australian birds known as Chats take the next sub-family to themselves. The common Chat is known as a "Tang," "Nun," and "Tin-tac." While the White-fronted Chat is very common in the South, the beautiful Crimson-breasted Chat, with its crimson cap and pure white throat, and the Orange-fronted Chat, are found mostly in the dry interior, where they are known as Salt-bush Canaries. A good common name is urgently required for this Australian sub-family of birds. North calls them Nuns; but that name is preoccupied, and is suitable only for one of them. I was much interested last week (January, 1911) to see a male White-fronted Chat feeding a fully-fledged young Bronze Cuckoo. Two female Sparrows were also in attendance, one of which fed the Cuckoo three times while I was observing it. A female Bronze Cuckoo sat for some time by the young one, but did not interfere, or offer to feed it. The Chat returned the fifth time for the purpose of feeding the young Cuckoo, when the passing of a motor-car broke up the party. The young Cuckoo flew across the road and some distance on to a bush, where it resumed its constant wheezing whine. It is unusual to find birds so far apart as a Finch, like the Sparrow and a member of the Thrush family, like the Chat, feeding the one young Cuckoo. (continued below) ==== [Page 128] [Illustration: [266] [267] [268] [269] [270] [271] [272]] F. 122. TIMELIIDAE (27), BABBLERS, BABBLING-THRUSHES, 590 sp.--65(65)A., 447(443)O., 7(3)P., 75(75)E. (an ill-defined family). 6 6 =266* Spotted Ground-Bird= (-Thrush, -Dove), Babbling-Thrush, _Cinclosoma punctatum_, S.Q., N.S.W., V., S.A., T. Stat. r. _scrubby_ 10.7 Crown, back rufous-brown; back striped black; shoulders steel-black spotted white; throat, narrow chest band steel-black; eyebrow, patches on throat white; breast gray; tail tipped white; f., upper lighter; throat white, rufous patch at side. Insects. Rise with a whirr-r-r. Low piping whistle. [Page 129] =267 Chestnut-backed Ground-Bird= (-Thrush), _C. castano-notum_, W.N.S.W., W.V., S.A., W.A., N.W.A. Stat. r. _plains_ 9 Upper chestnut-brown; eyebrow, side-throat white; throat, chest black; shoulder black spotted white; tail tipped white; f., duller; throat, chest gray. Insects. 1 1 =268 Pilot Bird=, _Pycnoptilus floccosus_, E.N.S.W., E.V. Stat. v.r. _dense scrubby gullies_ 6.7 Rich dark-brown; throat rufous mottled dusky; f., sim. Insects. "Guinea-a-week." 3 5 =269 Scrub-Robin=, _Drymodes brunneipygius_, N.S.W., V., S.A. (interior). Stat. v.r. _mallee_, _scrub_ 8 Upper brown; wings brown barred white; tail brown, slightly tipped white; under grayish-brown; long legs; shy, runs; f., smaller. Insects. Monotonous whistle. 2 2 =270 Chestnut-rumped Ground-Wren=, Red-rumped Scrub-Warbler, _Hylacola pyrrhopygia_, N.S.W., V., S.A.