

FORMICAKUUE. 



the inner, and united at the base, the hind toe moderate ; the claws rather short, curved, and acute, that 

 of the hind toe long. 



The species are found in India, Sumatra, and New Guinea. 



1. E. maci-ocercus Temm. PI. col. 516. 



2. E. Ajax Temm. PI. col. 573. — Type of Ajax Less. (18 



S. E. ccerulescens Temm. PI. col. 574. 



4. E. diana (Less.) Belang. Voy. Ind. Or. Ois. t. 3. 



Dasycephala Swains.* 



Bill long, straight, the base wide, and the sides much compressed, with the culmen straight through 

 nearly its whole length, but curved and suddenly hooked at the tip, which is slightly emarginated ; the 

 gonys very long, and gradually curved upwards ; the nostrils lateral, with the opening large, somewhat 

 rounded, and partly concealed by the frontal plumes and bristles. Wings moderate, with the third and 

 fourth quills equal and longest. Tail moderate and rounded. Tarsi as long as the middle toe, and 

 covered in front with transverse scales. Toes long and slender, with the outer toe longer than the inner, 

 and united at the base ; the claws long, curved, and acute, that of the hind toe longest. 



The species of this genus are found in most parts of South America, and one species in Western Africa : those of 

 the former region frequent the plains and valleys, and are often observed perched on the tops of the hushes that are 

 scattered in such places. Mr. Darwin has several times seen them chasing coleopterous insects on the wing, in a 

 peculiar manner, half- hopping and half-flying ; when thus employed, they spread their tail to its full extent. 



1. D. cinerea (Gmel.) Briss. Ornith. Suppl. t. 9. f. 3., Spix, 

 Av. Bras. t. 26. f. 2. — Tyrannus rufus Vieill. 



2. D. thanmophiloides (Spix), A v. Bras. t. 26. f. I. 



3. D. rufiventris (Vieill.) Swains. N. Diet. d'Hist. Nat. xxxv. 

 p. 93., Azara, No. 205. 



4. D. ftrruginea (Less.) Rev. Zo 1. 1839. P- 138. 



5. D. livida (Kittl.) Vog. von Chili, t. 1. — Tyrannus guttu- 

 ralis Eyd. $ Gerv. Mag. de Zool. 1836. t. 62. ; Pitangus chilensis 



6. D. striata (Gould), Voy. of Beagle, Birds, p. 66. 



7. D. microptera (Gould), Voy. of Beagle, Birds, pi. xii. 



8. D.maritima (D'Orb. & Lafr.) — Agriornis leucura Gould, 

 Voy. of Beagle, Birds, p. 57. pi. xiii. 



9. D. (?) albifrons (Gmel) Swains. PI. enl. 707- f. 1.— Pipra 

 leucops Vieill. ; Type of Pithys Vieill. (1823). 



10. D. ? leucophrys (Tschudi), Fauna Peruana, p. 19. 



11. D. syndactyla Swains. B. of W. Afr. 1. p. 26l. 



Malacopteron Eyton.^ 



Bill long and broad at the base, with the culmen rather elevated, keeled, and slightly curved towards 

 the tip, which is suddenly curved, hooked, and slightly emarginated, the sides much compressed from the 

 middle ; the gonys long, and curved upwards ; the nostrils lateral, placed in a membranous groove, 

 covered with plumes as far as the opening, which is oblique and partly exposed. Wings rather long- 

 arid rounded, with the first quill short, and the fourth nearly as long as the fifth and sixth, which are 



* Established by Mr. Swainson in 1831 {Fauna Boreali- Americana, p. 486.). Ayriornis of Mr. Gould (1838) and Tamnolanius of 

 M. Lesson (1839) are synonymous. It probably embraces Pithys of M. Vieillot (1823). 



f Mr. Eyton established this name in 1839 (Proc. Zool. Soc. 1839. P- 102.). Trichastoma (1842) and Alcippe (1844) of Mr. Blyth 

 are synonymous. 



