380 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



Female : MVing, 108-117.5 (average, 112.6) mm.; tail, 69-78 (73.7) ; 

 exposed culmen, 43.5-50 (46.8) ; tarsus, 16-18 (16.9). 



Both sexes : ^ Wing, 107-118 (average, 112.7) mm. ; tail, 69-78 (74) ; 

 exposed culmen, 43.5-50 (46.7) ; tarsus, 16-18 (17) . 



Type locality. — Sibabo Bay, Simalur Island, Barussan IslandSy 

 western Sumatra. 



Geographic distribution. — Simalur Island, Pulo Siumat (near 

 Simalur Island), the Batu Islands, Pagi Islands, and, excepting Nias 

 Island, doubtless other adjacent and intervening islands of the Barus- 

 san chain. 



RemarliS. — The most conspicuous characters separating this new 

 subspecies from Sauropatis chloris cyanescens are its more greenish 

 wings and upper parts, and larger size. As in all the races of this 

 difficult species these characters are not entirely constant, but are 

 excellent average distinctions. The buffy suffusion on the sides is 

 not due to immaturity, and seems to be, as in Sauropatis chloris 

 davisoni., a reliable character, for in Sauropatis chloris and Sauro- 

 patis chloris cyanescens it appears but seldom and then usually 

 as a mere trace. From Sauropatis chloris armstrongi of the Malay 

 Peninsula the present form differs in its very much larger size; also, 

 in the male, in much more greenish upper parts, especially exposed 

 surface of closed wings: darker more brownish pileum; more blackish 

 auriculars and nuchal band; rather smaller white supraloral spot; 

 and somewhat less pronounced buffy suffusion on the sides and flanks ; 

 and, in the female, by reason of much more olive brownish (less bluish) 

 upper surface; less gi-eenish ear-coverts; wider black nuchal band; 

 and more greenish (less bluish) outer edges of the upper surface of 

 the wing-quills. It may be separated from Sauropatis chloris azela by 

 its much larger size; also, in the male, by the more greenish outer 

 edges of the superior surface of wing-quills; and, in the female, by 

 the same character as well as by lighter upper parts. Compared 

 with Sauropatis cKloris davisoni it is much larger ; the male is with- 

 out buffy suffusion on the white cervical collar ; has much less buff on 

 the lower parts, and this restricted to sides and flanks; the upper 

 surface darker, usually more brownish, particularly on the pileum; 

 the ear-coverts more blackish ; and the black nuchal band more in evi- 

 dence; while the female is darker, more olive brownish above; with 

 the ear-coverts less greenish; the exposed outer edges of superior 

 surface of wing-quills more greenish (less bluish) ; the under sur- 

 face and white cervical collar without creamy wash. 



The female of Sauropatis chloris chloroptera may be distinguished 

 from the male by the noticeably duller, more brownish back, less 

 bluish wings, and entire lack of buffy suffusion below. 



^ Seven specimens, from Simalur Island, North Pagi Island, and the Batu Islands. 



* Seventeen specimens, from Simalur Island, North Pagi Island, and the Batu Islands. 



