1 9^ 8-] recently collected in Siam. 97 



r39. Caprimulgus asiaticus Lath. 

 2 c? ad. Koh Lak. 



Iris dark; bill brownish, tip black ; feet fleshy-brown. 

 T.L. 225, — ; W. 141, 148. 



Trogonid.e. 

 -7-^40. Pyrotrogon oreskius (Temm.). 



1 ? . Lat Bua Kao. 



Orbital skin slaty- blue ; bill slaty-grey, tip black; feet 

 slaty-grey. 



T.L. 290; W. 115; B. f. g. 22. 



CUCULID.E. 



7^41. Surniculus lugubris dicruroides Hodgs. 



Stresemann, Nov. Zool. xx. 1913, p. 311. 



1 ? . Koh Lak. 



Bill black ; feet plumbeous, soles dull white. 



T. L. 250 ; T. 125 ; W. 133^ ; B. f. g. 27. 



Stresemann, who has examined a large series of the Black 

 Cuckoo, is of opinion that two subspecies must be recog- 

 nized in Continental Asia— a large form, S. I. dicrurdides 

 (typical locality, Nepal: wing 136-148, average about 

 141 mm.), and a smaller race, S. I. bracJnjurus (typical 

 locality, Pahang, Malay States : wing 117-139, average 

 about 123 mm.). Both differ from the true lugubris of 

 Java, Bali, and Ceylon (in which the wing ranges between 

 122 and 131) in having the middle tail-feathers longer, 

 instead of shorter, than the wing. The former possibly 

 ranges eastward as far as Hainan ; the latter is said to 

 occur also in Sumatra and Borneo. 



I have measured nine adult birds from the Malay Peninsula 

 (no white spots on the body), and I find their wings are as 

 follows :— 138, 137, 135, 135, 131, 127, 121, 118, ]18. 

 These dimensions are within the range given for brachyurus ; 

 but there is also a specimen obtained on the mountains in 

 February with a wing of 145 mm. (almost the extreme of 



* The wing-measurements of other Siamese birds are 135 135 

 138 mm. ' * 



SEK. X. — VOL. VI. 



H 



