376 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



Measurements. — Male:^ wing, 100-104 (average, 101.3) mm.; tail, 

 66-69.5 (67.2) ; exposed culmen, 39-43 (40.8) ; tarsus, 14-16.5 (15.5). 



Female :2 Wing, 101.5-106.5 (average, 104.5) mm.; tail, 67.5-71 

 (69.6) ; exposed culmen, 40-41.5 (40.8) ; tarsus, 15-16.5 (15.7). 



Both sexes: 3 Wing, 100-106.5 (average, 103.1) mm.; tail, 66-71 

 (68.6) ; exposed culmen, 39-43 (40.8) ; tarsus, 14-16.5 (15.6). 



Type locality. — Aberdeen, South Andamans.* 



Geographic distribution. — Andaman Islands. 



Remarks. — The strong buff tinge of the whitish cervical collar 

 and of the posterior lower parts is the most conspicuous, though not 

 the only, character separating this form from Sauropatis chloris 

 armstrongi, and, indeed, from the other subspecies of Sauropatis 

 chloris as well. This buff suffusion is not due to immaturity, as some 

 ornithologists appear to have supposed, but is present in all adult males, 

 with, of course, some individual variation in extent and intensity ; and 

 is almost entirely lacking in the females, excepting on the cervical 

 collar, where, however, it is less pronounced than in the males. The 

 female of Sauropatis chloris davisoni is superficially very much like 

 the same sex of Sauropatis chloris armstrongi., but, with the excep- 

 tion of the buff tinge on the lower parts, differs as does the male, 

 though in somewhat less degree. From Sauropatis chloris cyanescens 

 the present race may be distinguished by its smaller size ; strong buff 

 suffusion on the white cervical collar and posterior lower parts; 

 duller, darker, and more greenish upper surface, with a dusky shade 

 on the back just below the white cervical collar. From Sauropatis 

 chloris chloroptera ^ the Andaman race differs so much in its reduced 

 size and strong suffusion of buff on lower parts and cervical collar 

 that more detailed comparison is unnecessary. 



The female of Sauropatis chloris davisoni., except in the conspicu- 

 ous lack of buff on the under surface, differs rather less from the 

 ma-e than does the female in some other forms: She is rather duller, 

 more greenish above, particularly on the wings, and has more no- 

 ticeably blackish ear-coverts and nuchal band. The immature female 

 is more brownish on the upper surface than the adult, duller on the 

 wings, and has the white feathers of cervical collar and breast tipped 

 with dusky. An immature male from Macpherson Strait, South An- 

 daman Island, differs from the adult of the same sex principally in 

 its duller, less bluish upper surface, including the wings, and in 

 the dusky tips on the cervical collar and entire breast. 



The colors of the soft parts in this race, as noted on specimen 

 labels, are : Bill black, the basal portion of mandible white or pinkish 

 gray ; feet dull or light purplish brown. 



1 Four specimens, from the Andaman Islands. 



* Five specimens, from the Andaman Islands. 

 8 Nine specimens, from the Andaman Islands. 



* Type of male in British Museum. 



* See p. 379. 



