Smythies (1963:277) was the first to record this species from North Borneo. However, the Harvard Primate Expedition in 1938 took three specimens as follows: [Male], Sandakan, June 6, 1937, MCZ 197123; [Male], Morutai Besar, June 27, 1937, MCZ 197124; [Male], Kalabakan River, July 16, 1937, MCZ 197125. The Harvard collection of birds from North Borneo appears to have been overlooked, although it was mentioned in passing by Smythies (1960:526). The specimens in my collection were taken in the same general area where H. G. Deignan took the Harvard specimens. _=Loriculus galgulus=_ (Linnaeus): Malay Lorikeet.--_Specimen_, 1: Cocoa Research Station: [Female], May 1, 1963, ADG 103. This lorikeet was rare at all of our collecting localities. _=Cuculus fugax fugax=_ Horsfield: Malayan Hawk-Cuckoo.--_Specimens_, 3: Cocoa Research Station: [Male], 86.0 gm., August 28, 1963, MCT 2825; [Male], 79.0 gm., September 11, 1962, MCT 2899; [Female], September 28, 1962, MCT 2977. This species was first observed on August 28 in primary forest and was seen regularly from then until September 28 in secondary forest, primary forest, and in cocoa shade trees. _=Cacomantis sonnerati=_ (Latham): Banded Bay Cuckoo.--Birds that may have been of this species were observed on several occasions. E. J. H. Berwick (pers. comm.) claimed he had heard _C. sonnerati_ at the Cocoa Research Station. I have heard many times a call sometimes ascribed to this species but I have not actually seen the bird making the sound. If the call note I heard is actually of this species it is not rare in the Quoin Hill area. _=Cacomantis merulinus threnodes=_ Cabanis and Heine: Plaintive Cuckoo.--_Specimens_, 5: Cocoa Research Station: [Male], 25.0 gm., September 8, 1962, MCT 2891; [Female] imm., 27.0 gm., September 8, 1962, MCT 2892; [Male] testis 4 x 3 mm., November 29, 1962, MCT 3382. Tenom: [Male], January 1, 1963, MCT 3563. Ulu Balung: [Female], July 15, 1963, ADG 199. This cuckoo was common in all habitats examined at all of our collecting stations, except the moss forest near Tenom. _=Cacomantis variolosus sepulchralis=_ (S. Muller): Fantailed Cuckoo.--_Specimens_, 2: Cocoa Research Station: [Male], 30.8 gm., August 28, 1962, MCT 2824. Ulu Balung: [Male], July 10, 1963, ADG 183. The specimens were collected in primary forest. There are only five earlier records for all of Borneo (Smythies, 1960:253-254). Probably this species nests in Borneo; it is unlikely that specimens taken in August and July are migrants. _=Chalcites xanthorhynchus xanthorhynchus=_ (Horsfield): Violet Cuckoo.--_Specimens_, 1: Cocoa Research Station: [Female] largest ovum 1 mm., September 26, 1962, MCT 2964. This species was seen twice, both times in the research station cocoa plantings. The specimen taken was from a shade tree, _Trema orientalis_.