CtTCULIDiE. 
Cuculus optatus Gould.' Gould’s Cuckoo. - 
Cuculus oplaius Gould, Proc. Zool. Soc. 1845, p. 18 : North 
Australia. 
Cuetdus korspetdi ,c Moore" p Horsfield and Moore, Cat. Bds, Mus. East 
Ind. Coy. ii, 1858, p. 703 : Java. 
Distr, — Malay States. 
Sumatra; Nias Island, West Sumatra. 
Borneo. 
Java; Bali. 
Cuculus poliocephalus Lath. Small Cuckoo. 
[Cuculus poliocephalus poliocephalus Lath. 
Cuculus poliocephalus Latham, Index Orn. i, 1790, p. 214 : India. 
Distr . — Extra -limital . ] 
Cuculus poliocephalus insulindae Hartert. 
Cuculus intermedius insulindae Hartert, Vog. pal. Fauna, ii, 1912, 
p. 952 : Mt. Kinabalu, North Borneo. 
Distr. — Borneo. 2 
Cuculus poliocephalus lepidus S. Miill. 
Cuculus lepidus S. Muller, Verb. Nat. Gesch. Land eu Volk. 1845, 
p, 236 : Timor. 
Distr. — Malay States. 
Sumatra. 3 
Java; Bali, 
Genus PENTHQCERYX* Cabanis and Heine. 
Penthoceryx sonneratii (Lath.). Banded Bay Cuckoo. 
[Penthoceryx sonneratii sonneratii (Lath.). 
Cuculus Sonneratii Latham, Index Orn. i, 1790, p. 215 : Bengal. 
Distr . — Extra-limitaL] 
Penthoceryx sonneratii malayanus Chas, and Ivtoss. 
Penthoceryx sonnerati malayanus Chas. and Kloss, Bull, Raffles 
Mus., 5, 1931, p. 84: Kuala Lumpur, Selangor, Malay States, 
Distr. — Malay Peninsula (not extreme south). 
t C. saturates Blyth, Tourn. As. Soc. Bengal, xii, 1843, p. 942 (India) 
is possibly the name for this bird, but optatus is the first name of certain 
application. Also occurs in South-west Siam and therefore almost certainly 
in Peninsular Siam. 
J The Bornean form is separable from lepidus of Java on account of 
the darker grey parts of the plumage. 
3 The few birds from Sumatra seen by us (together with those from the 
Lesser Sunda Islands! seem nearer to lepidus than to insulindae. Some are 
lepidus > insulindae. 
4 Cf. Baker, Bull. B. O. CL xxxix, igig, p. 45 - 
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