ISHii.] PROCEEPTNGS OF UNITED STATES NATIONAL MUSEUM. 647 



Our new is{)ecies is much nearer related to Ch. javanica, from which, 

 however, it differs not only in size, being, as it is, considerably larger, 

 but also in coloration. The gloss of the upper surface is more green- 

 ish ; the brown of the throat is more chestnut ; the gray of the under 

 parts deeper and less tinged with rusty; the under tail-coverts darker 

 and tipped with pure white margin not tinged with rusty, as in the 

 Javan bird. It should be remarked, however, that in the unsexed speci- 

 men in the Philadelphia Academy, these tips are nearly white. The 

 tail of the present species is somewhat more furcate, but in spite of 

 this, the outer rectrices are less attenuated at the tip. 



The following descri[)tion of the type specimen is appended for the 

 sake of completeness. 



$ ad. ( Urassowiagiri, OJcinawa Shima, Liu Kiu, March 11, 1886. Coll. 

 31. Namiye). Above, except forehead and anterior portion ot crown, 

 black with a strong gloss of steel-blue, somewhat inclining to greenish; 

 forehead and anterior half of the crown deep chestnut, the feathers of 

 the latter being bluish black in the center ; lores deep velvety black ; 

 cheeks and lower ear-coverts, chin, throat, and fore neck bright tawny 

 hazel inclining slightly to cinnamon, and becoming somewhat lighter 

 towards the breast; upper half of the ear-coverts, sides of neck bluish 

 black, like the back, this color descending on the side of the breast, 

 forming a distinct serailune on each side, which partly separates the 

 hazel of the neck from the rest of the under surface, which is of a 

 nearly pure drab, each feather near the middle line of the body broadly 

 though not very distinctly margined with whitish, the under tail-coverts 

 gradually becoming blackish towards the tip, which is broadly and dis- 

 tinctly margined with white; under wing-coverts and axillaries of a 

 drab color similar to that of the breast, but darker ; wings and tail 

 above black with a faint gloss of steel green ; the tail-feathers, except 

 the middle pair, with an oblique oval white spot in the inner web to- 

 wards the tips, those on the outer pair being the smallest. 



Total length, according to Namiye, llo"""" ; stretch of wings, 325™™. 

 Wing, US'"™ ; longest tail-feathers, 58™™ ; furcation of tail, 14™"' ; ex- 

 posed culmen, 8.5™™ ; tarsus, 10™™ ; middle toe with claw, 15™™. 



In order to better show the differences in size and proportions between 

 the present species and its two nearest allies I append the following 



Table of comparative measurements. 

 1. CHELIDON NAMIYEI. 



