12 PROCEEDIN^GS OF THE NATIONAL MUSEUM vol. 75 



PERNIS PTILORHYNCHUS PTILORHYNCHUS (Temminck) 



Faho ptilorhunchns Temminck, PI. Col., livr. 8, IMarch, 1821, pi. 44 (Java 



aud Sumatra; later text to pi. 270, restricted to Java). 

 Pernis aplvorus ptilorhynchus Chasen and Kloss, Ibis, 1926, p. 279. 



One male, Siberut, September 22. 



This specimen is in A'ery peculiar plumage. The head creamy- 

 white; the center of the croAvn sayal brown, becoming darker on the 

 nape, with a few very fine black shaft streaks; a broad loral streak 

 to the eye bister mixed with white and with fine black shaft streaks ; 

 a broacl postocular streak cinnamon; chin and throat light buff; 

 breast cinnamon buft', deepening on the belly, lower flanks, and 

 thighs to cinnamon, the breast with narrow sepia shaft streaks, these 

 streaks becoming mere hair lines of a much lighter color on the re- 

 mainer of the lower parts; the crest is rather short and black. Blan- 

 ford ^^ describes similar specimens as the young. Like most hawks 

 it probably goes through several stages before assuming the adult 

 dress. 



OTUS BAKKAMOENA MENTAWI Chasen and Kloss 



Otus bakkamoena mentatci Chasen and Kloss, Ibis, 1926, p. 279 (Sipora 

 Id., W. Sumatra). 



One adult male and one immature female, Siberut ; one adult male 

 and one immature female, Sipora. 



The above race has been compared by the original describers with 

 O. b. lemplji of Java. A series of two males, four females, and one 

 immature male (nearly adult) in the United States National Museum 

 from Java is fairly uniform above (except some are slightly lighter, 

 especially the immature) ; below there is quite a little variation, some 

 have the buff tone much deeper (clay color) grading to others with 

 little buff at all, appearing grayish. The latter are probably younger 

 birds, as the immature one is very light. The general effect above 

 is grayish with a tawny-olive wash. 



Compared with the Javan bird, 0. h. mentawi is, as the describers 

 say, more deeply colored below and the other differences mentioned 

 hy them hold good; but this form is also much darker above, the 

 upper parts being washed with cinnamon brown. 



The two immatures are much lighter than the adults, one much 

 redder than the other. 



The type of Pisorhina umbra Richmond from Simalur Island is 

 much smaller than O. h. mentaivi; tawny in color with the black 

 markings much reduced and almost lacking; the scapulars with a 

 large Avliite spot followed by a blackish one posteriorly on the outer 

 web; the belly with a few white crossbars. Wing, 143 mm. O. h. 



" Fauna Brit. India, vol. 3, 1895, p. 407. 



