614 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 39. 



cyanine blue and Paris blue; rest of upper surface grayish seal brown; 

 wings and tail fuscous, the latter with a slight bluish sheen exteriorly, 

 the former edged with grayish seal brown, the bend of the wing and 

 primary coverts more or less bluish; breast and remainder of lower 

 parts slate gray, the middle of lower abdomen paler, the breast and 

 upper abdomen washed with blue, heavily on the former, the sides, 

 flanks, and crissum tinged with brown, most so on flanks; external 

 lower wing-coverts blue like head, the others, together with axillars, 

 slate gray washed with blue; thighs slate gray, washed with blue. 



Measurements. — Eleven males: Wing, 69.5-74.5 (average, 72.9); 

 tail, 66-74 (average, 70.2); exposed culmen, 11-12.5 (average, 11.7); 

 tarsus, 16.5-18 (average, 17.1) mm. Five females: Wing, 69-72.5 

 (average, 70.1); tail, 63-69 (average, 66.4); exposed culmen, 11.5; 

 tarsus, 17-18 (average, 17.3) mm. 



Type-locality. — Engano Island, western Sumatra. 



Geographical distribution. — Engano Island. 



The immature male of this race is practically identical with the 

 adult female, and differs from the immature male of Hypotliymis a. 

 consohrina in its darker, duller, more grayish (less whitish) posterior 

 lower parts, especially the middle of abdomen. From Hypotliymis 

 azurea tytleri, of the Andaman Islands, with which it has been con- 

 sidered identical," Hypotliymis a. riclimondi may be readily distin- 

 guished in the adult male by its decidedly darker upper and lower 

 parts, particularly the abdomen, and by the almost entire lack of 

 contrast between the color of pileum and of back; in the female by 

 darker coloration, especially of the blue areas above, and the grayish 

 of the posterior lower parts, the middle of abdomen not at all, or but 

 very slightly, whitish. 



This new form is most nearly, allied to Hypotliymis azurea conso- 

 hrina and H. a. tytleri, and is very distinct from the geographically 

 intervening races. It is apparently confined to the island of Engano. 

 Individual variation is most noticeable in the color of the pileum, 

 which is occasionally lighter in contrast with the back, and on the 

 lower abdomen, which is sometimes appreciably whitish medially. 

 These differences, however, do not interfere with the characters of 

 the subspecies as above given. 



"Salvadori, Ann. Mus. Civ. Genova, vol. 32, 1892, p. 129. 



