Zoological Society. 203 
This type seems to require a place between Rhipidura and Crypto- 
lopha, to which last it is allied by the bill, which however is shorter 
and broader, leading to the next singular form, which is a flycatcher 
in the guise of a swallow, and forms with this one a perfect passage 
from the Flycatchers to the Swallows. 
Genus Hemichelidon, mihi. 
General structure of a swallow, with only something Muscicapan 
in wings and rictus; bill as in Hirundo exactly, but the gape hardly 
so wide and slightly bristled ; nares round and vertical, as in Hirundo ; 
wings long and pointed; 1st quill spurious, 2nd long, 3rd longest ; 
tail moderate and subfurcate; legs and feet small and slender. 
Types, H. fuliginosa and ferrugined. 
H. fuliginosa, mihi.—Uniform sooty brown, darkest on the wings 
and tail, and shaded with white on the belly, vent, and under tail- 
coverts; the body below paler than above. Length, 4% inches; 
bill, 3; tail, 2; tarse, 4; central toe and nail, less ,7,; hind, 53; 
wing, 23. 
H., ferruginea, mihi.—Size and proportions of the last; colour 
rusty brown, passing to olive on the cap; alars and caudals inter- 
nally blackish, and more or less so apertly; bill dusky carneous ; 
legs pure fleshy ; tail (in both) moderate and slightly forked. 
Found only in the hills, and chiefly the central region; dwell in 
woods and have the general manners of the Flycatchers, but with a 
bolder and more continuous flight. 
Genus Hemipus, mihi. 
General structure of Rhipidura, passing to Myiagra ; legs and feet 
very small; bill more or less elongated and cylindric; rictal bristles 
moderate, that is, shorter than in Rhipidura; tail gradated and 
narrow. 
Type, H. picecolor, mihii—Above dusky brown, passing to black 
on the wings and tail; a large oblique central bar of white down the 
wing; two bars on the croup, the margin of the black cap, and the 
terminal part of the lateral alars white; below pale sooty to the 
breast, thence to tail-coverts albescent ; bill and legs black, Female 
wanting the black cap of the male. Length, 5# inches; Dill, 12; 
tail, 23; wing, 23; tarse, $; central toe and nail, ;4,; hind, 55,. 
Inhabits the hills generally ; chiefly procured in the great valley. 
ALAUDINA. 
Genus Heterura, mihi. 
Bill to gape equal to the head, to brow much less than the head ; 
Anthine in the general character, but stronger, with the culmen, 
commissure and gonys more or less curved; base of the upper man- 
dible a good deal cut out by the nareal fosse, and its tip inclined and 
notched ; tomiz trenchant and scarpt internally ; nares advanced, la- 
teral, oval, shaded above by a nude scale-like membrane ; rictus to 
eye, and slightly bristled ; wings very short, not surpassing the base 
