Order II. PASSERES. 
Tribe III. Dentirostres. 
Family IV. Ampelidje. 
The fourth Subfamily, 
CAMPEPHAGINiE, or Caterpillar-catchers, 
have the Bill short, and rather depressed, with the culmen slightly curved, and the sides compressed to 
the tip, which is emarginated and sometimes hooked ; the gape furnished with a few short bristles ; the 
nostrils basal, rounded, and more or less exposed; the Wings moderate, with the third, fourth, and 
fifth quills the longest ; the Tail long and rounded on the sides ; the Tarsi short, and covered with 
transverse scales ; the Toes generally short, and the lateral ones unequal ; the claws moderate, compressed, 
and much curved. 
Ptilogonys Swains .* 
Bill short, and rather depressed, with the culmen gently curved, and the sides compressed to the tip, 
which is hooked and emarginated ; the gonys moderate and ascending ; the nostrils placed in a broad 
short membranous groove, large, rather rounded, and slightly covered with short bristles. Wings 
moderate, with the first three quills graduated, and the fourth and fifth nearly equal and longest. Tail 
lengthened, broad, and slightly forked. Tarsi the length of the middle toe, feathered below the knee 
and broadly scaled in front. Toes moderate, rather slender, the inner one shorter than the outer, which 
is united at its base ; the hind toe short, strong ; the claws moderate, compressed, and much curved. 
The birds inhabit the warmer parts of South America ; and their habits and manners are unknown. 
1. P. cinereus Swains. Zool. Illustr. n. s. pi. 62. 120. — Hypo- 
thymis chrysorrhoea Licht. 
2. P. nitens Swains. Two Cent, and a Quart, p. 285. 
3. P. leucotis Tschudi, Fauna Peruana, p. 10. 
4. P. griseiventer Tschudi, Fauna Peruana, p. 10. 
5. P. armillatus (Vieill.) Ois. d’Amer. Septr. pi. 42 Myia- 
destes genibarbis Swains. Nat. Libr. x. Flyc. pi. 1 3. ; Type of 
Myiadestes Swains. (1838). 
6. P. obscurus (Lafr.) Rev. Zool. 1839. p. 98. 
Pericrocotus Boie.-f 
Bill moderate, broad at the base, with the culmen slightly curved, and the sides much compressed to 
the tip, which is emarginated and hooked ; the gonys long and slightly ascending ; the nostrils basal, 
* Established by Mr. Swainson in 1824. It is synonymous with Hypothymis of M. Lichtenstein (1831 ?), and it embraces Myiadestes 
of Mr. Swainson (1 838). 
t Established by M. Boie in 1826 ( Isis, 1826, p. 972.) Phanicornis of M. Boie (1827), and Acis of M. Lesson (1831) are coequal. 
