BLACK-BILLED GAPER. 
239 
is blue-black, with the edges pale ; the feet axe 
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, lyj ; 
front, ; wings, 4 ; tail beyond, 2 X 2 5 ; 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 Eurylaxmm Horsfieldii 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. Temminek, and some other 
Continental writers, have attempted to affix to the species 
originally described by Sir Stamford ltafHes, we cannot, in 
justice, adopt. 
