BIRDS FROM SIAM AND THE MALAY PENINSULA 335 



Dr. W. L. Abbott collected two males on Kao Soi Dao, 1,000 feet, 

 Trang, February 2 and 16, 1899, and an immature female in the hills 

 of Trang, February 16, 1897. He describes the soft parts as: Iris 

 clear brown; feet dark fleshy brown. 



The three Trang and three Nakon Sritamarat males have more 

 pronounced white tips to the remiges than two typical males from 

 farther south (Selangor-Pahang boundary and Gunong Ulu Kali). 

 The three Nakon Sritamarat specimens are somewhat grayer than the 

 Trang males, but the difference is slight. 



The immature female collected by Dr. Abbott has the feathers of 

 the back and pileum edged with mars brown instead of the very dark 

 brown, almost black, of the adult; the centers of the feathers are not 

 well defined as in the adult, except the shaft streak; the throat as in 

 the adult but more restricted; the breast and belly sayal brown with 

 dusky and tawny mottling; the spots on the wing coverts and remiges 

 very faint and fulvous; the tail as in the adult. It is a young bird 

 about half grown. 



The race extends from the Federated Malay States north through 

 Peninsular Siam as far as the province of Bandon, where it has been 

 recorded by Robinson from Kao Nawng.^^ 



CORYTHOCICHLA BREVICAUDATA COGNATA Riley 



Corythocichla brevicaudata cognata Riley, Proc. Biol. Soc. Washington, vol. 46, 

 p. 156, 1933 (Kao Sabab, southeastern Siam). 



One male, Kao Kuap, Krat, December 25, 1929; eight males and 

 five females, Kao Sabap, January 7, 1930, November 2, 16, 1933. 



The present form was described as similar to C b. striata, but the 

 gray of the throat deeper, the streaks much paler, and the upper- 

 parts darker, less rufescent. Wing, 57; tail, 35; culmen, 14; tarsus, 

 23; middle toe with claw, 19.5 mm. 



C. griseignlaris Delacour and Jabouille, from Bokor, southern 

 Cambodia, is evidently closely related, but it is described as having 

 a uniform gray throat and chest, and the published plate, ^^ if anywhere 

 near accurate, shows quite a different form — more reddish above and 

 on the flanks, lighter on the breast, the cheeks and throat lighter, 

 and the latter unstreaked. 



C. b. cognata was originally founded upon three specimens, but 

 since then Dr. Smith secured 11 more from Kao Sabap. 



The nine males measure: Wing, 57-61 (59.6); tail, 35-42.5 (39.7); 

 culmen, 13.5-15 (14.2 mm.) The five females: Wing, 56.5-58 (57); 

 tail, 37-40 (38.3); culmen, 13-14 (13.5) mm. 



I consider de Schauensee's ^® record of Napothera griseigularis from 

 Chantaboon to belong to this form. 



'• Journ. Federated Malay States Mus., vol. 5, p. 104, 1915. 



" Oiseaux rindochine Fran^aise, vol. 3, pi. 46, 1931. 



» Proc. Acad. Nat. Scil Philadelphia, vol. 86, pp. 3, 190, 1934. 



