ROUGH-WINGED SWALLOW. 195 



and colour, but readily distinguishable by drawing the finger along the edge 

 of the wing, when the stiff projecting tips of the filaments are felt like the 

 ed^e of a fine saw. 



Male, 5f, 12h, in extent. 



FAMILY VII. MUSCICAPINJE. FLYCATCHERS. 



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 thi*ee 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| 



