BLACK-BILLED GAPER. 239 



Is blue-black, with the edges pale ; the feet arc 

 also pale. The female, or young bird, is distin- 

 guished by having a fulvous- white spot at the tip of 

 each of the wing-covers. 



Total length, exactly 9 inches ; bill, gape, 1^ ; 

 front, T % ; wings, 4 ; tail beyond, 2^ ; base, 4 ; 

 tarsus, f . 



The next form is that to which we retain Dr. 

 Horsfield's original name of 



EURYLAIMUS. 



Here we have the bill more flattened, particularly 

 the under mandible, the gonys of which is nearly 

 straight ; the nostrils are placed close to the front 

 of the head, and are surrounded with a narrow 

 membrane. The rictal bristles, which are so con- 

 spicuous in the last genus, are here very short and 

 weak, and the dilated base of the under mandible 

 very remarkable. The Eurylaimu* Horsfteldii and 

 Sumatranus* belong to this genus, and there are 

 probably other species. In the last named bird, 

 the dilation of the bill is so great that it actually 



* The new names which M. Temminck, and some other 

 Continental writers, have attempted to affix to the species 

 originally described by Sir Stamford Raffles, we cannot, in 

 justice, adopt. 



