ROUGH-' WINPVJ) SWALLOW. 
195 
and colour, but readily distinguishable by drawing the finger along the edge 
of the wiug, when the stiff projecting tips of the filaments are felt like the 
edge of a fine saw. 
Male, 51, 12s, in extent. 
FAMILY VII. MUSCICAPINiE. FLYCATCHEES. 
Bill depressed, triangular, compressed at the end, upper mandible notched, 
lower with the point slightly ascending. Head rather large, depressed : neck, 
short: body rather slender. Feet generally short; tarsus short, slender, with 
very broad scutella ; toes four, free ; the hind toe not proportionally large ; 
claws arched, compressed, acute. Plumage soft and blended. Wings long, 
with the first quill generally long, the outer three longest. Tail various. 
Tongue flattened, sagittate, bristly at the tip; oesophagus wide, without crop ; 
stomach elliptical, moderately muscular, with the lateral muscles distinct; 
the epithelium thin, dense, longitudinally rugous ; intestine short ; coeca ex- 
tremely small ; cloaca globular. Trachea simple ; inferior laryngeal muscles 
forming on each side a large pad, but not divisible into several portions as 
in the singing birds. Nests regularly formed, cup-shaped. Eggs from 
four to six. 
Genus I.— MILVULUS, Swains. SWALLOW-TAIL. 
Bill moderate, rather stout, straight, broad at the base, gradually com- 
pressed toward the end ; upper mandible with the dorsal outline a little 
convex, the edges sharp and nearly perpendicular, with a very small notch 
close to the small deflected tip ; lower mandible with the ridge very broad 
at the base, the sides rounded, the tip minute and ascending. Nostrils 
basal, broadly elliptical. Head rather large, depressed ; neck short; body 
- rather slender. Feet rather short ; tarsus short, slender, compressed, with 
very broad scutella, some of which almost meet behind ; toes free, the hind 
toe not proportionally larger, all scutellate above ; claws of moderate size, 
arched, compressed, acute. Plumage soft and blended. Wings long, second 
quill longest, first almost as long as third, the three outer abruptly notched 
near the attenuated tip. Tail extremely elongated and forked, the middle 
feathers being of ordinary length, the lateral longest. 
Vol. I. 29 | 
