366 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



and the Laurot Islands; and east to eastern Borneo with the small 

 islands along its eastern coast. 



Bemarks. — This recently described subspecies may be distinguished 

 from /Sauropatis chloric forsteni by its much longer bill ; and, in the 

 male, by decidedly more bluish upper surface, and more greenish 

 (less blackish) ear-coverts. The females of these two forms appear 

 to be scarcely different in color. Compared with Sauropatis chloris 

 chloris this has a longer bill ; in the male the upper surface is rather 

 more bluish, there being thus less contrast between the back and 

 wings; the ear-coverts are more greenish (less blackish); and the 

 blackish nuchal band narrower, more overlaid with green, and thus 

 less distinct; in the female the upper surface averages darker; the 

 wings are somewhat more bluish ; the ear-coverts more greenish, and 

 the blackish nuchal band usually more washed with greenish. 



The female of this race is commonly very different from the male 

 in her duller, more olive green upper parts, more blackish auriculars, 

 and broader black nuchal band. 



The Juvenal plumage is somewhat similar to that of the adult, but 

 the pileum is dull brown with posteriorly a wash of bluish green, 

 the feathers of the forehead with a few narrow creamy or buffy 

 edgings; blackish nuchal band more brownish; white feathers of 

 the cervical collar with dark brown or blackish tips; back duller, 

 darker, and more brownish ; wings and tail duller, less bluish ; sides 

 of head duller, more brownish, the cheeks and auriculars brownish 

 black, only the former with a slight greenish wash ; breast and abdo- 

 men somewhat tinged with buff ; breast, sides of throat and of body 

 heavily barred or marked with scale-like feather tips of fuscous; and 

 there is also a small blackish brown patch on each side of the breast. 

 The above description is taken chiefly from two ju venal birds, 

 a male, No. 182397, U.S.N.M., collected on Pulo Bilang Bilangan, 

 off eastern Borneo, June 1, 1913; and a female. No. 181897, 

 U.S.N.M., from Pulo Eaboe Eaboe, July 27, 1912, which dates give 

 some idea of the breeding season. 



Birds from the islands along the eastern coast of Borneo appear to 

 be identical with those from eastern Sumatra, as far north as La- 

 boean. Deli. In fact, there seems to be no essential geographic color 

 difference among specimens from the Natuna Islands, Anamba 

 Islands, Tambelan Islands, Bawean Island, Borneo with its coastal 

 islands, Banka, and eastern Sumatra. 



Specimens from various parts of the range of this subspecies 

 exhibit the following average measurements, in which most of the 

 variations are due to the small series from many of the localities : 



