no. 2088. RACES OF CAPRIMULGUS MACRURUS— OBERHOLSER. 595 



CAPRIMULGUS MACRURUS BIMACULATUS Peale. 



Caprimulgus bimaculatus Peale, U. S. Expl. Exp., vol. 8, Mamm. and Ornith., 

 1848, p. 170 ("Singapore": i. e., Malacca, Malay Peninsula). 



C[aprimulgus]. macrurus ambiguus Harteiit, Ibis, 1896, p. 373 (Malay Peninsula, 

 Burma, Assam, and the eastern Himalayas). 



Chars, subsp. — Like Caprimulgus macrurus anamesus, but larger. 



Measurements. — Male: 1 Total length (in flesh), 279.4-310 (average, 

 289.6) mm.; wing, 190-204 (193.5); tail, 135-161 (149.8); exposed 

 culmen, 9-11.5 (10.2); tarsus, 15-17 (16.2). 



Female: 2 Total length (in flesh), 279.4-292.1 (average, 285.8) mm.; 

 wing, 192-199 (194.3); tail, 142-150 (145.7); exposed culmen, 9.5-11 

 (10.3); tarsus, 15.5-16.5 (16). 



Type-locality. — Malacca, Malay Peninsula. 



Geographical distribution. — Malay Peninsula, north to Tenasserim, 

 Burma, Assam, and Province of Yunnan, southwestern China; and 

 east to Siam, Cambodia, and Cochin China. 



Remarks. — This race is very well differentiated from Caprimulgus 

 macrurus macrurus, being much larger and of lighter coloration, 

 especially on the upper surface. The colors of the unfeathered parts 

 in life are as follows : Iris dark brown ; bill brown, the tip black ; feet 

 brown, the claws dark brown or black. Like Caprimulgus macrurus 

 macrurus, the present race exhibits two color phases, (1) a grayish and 

 darker, and (2) a rufescent and paler condition, neither of which seems 

 to be at all correlated with sex or age. 



A single adult female (No. 62037, Museum of Comparative Zoology) 

 from Mongtsz, in the Province of Yunnan, southwestern China, 

 apparently does not materially differ from Malay Peninsula speci- 

 mens, though it is rather darker, both above and below, than the 

 average of Caprimulgus macrurus bimaculatus: 



This subspecies has been recently described by Doctor Hartert, 

 under the name Caprimulgus macrurus ambiguus, 3 to include the birds 

 from the Malay Peninsula, Burma, Assam, and the eastern Himalayas, 

 but without any definite type locality. Peale's earlier name Capri- 

 mulgus bimaculatus i is, however, undoubtedly applicable to this race, 

 and must therefore unfortunately supplant Caprimulgus macrurus 

 ambiguus Hartert. In the original description 4 Peale says: "The 

 specimen was obtained at Singapore;" but on a later page, 5 in his 

 Catalogue of Specimens obtained by the United States Exploring 

 Expedition, he gives only Malacca for Caprimulgus bimaculatus. 

 The type specimen, now in the United States National Museum, 



i Eight specimens, from Tenasserim, Lower Siam, and Malacca, Malay Peninsula. 



2 Three specimens, from Lower Siam, and Yunnan, China. 



« Ibis, 1896, p. 373. 



« U. S. Expl. Exp., vol. 8, Mamm. and Ornith., 1848, p. 170. 



6 Idem, p. 327. 



