AYES. 535 



outside on walls, lines it with feathers, and lays from four to six white 

 eggs. Another species, Hirundo dasypus TEMJI., is found at Borneo. 



Section II. Cypselince. Wings with ten primaries, either with 

 the first two quills subequal, longest of all, or with the second 

 surpassing the first (more rarely the first the second). Secondaries 

 short, hidden by coverts nearly to the extremity. Tail with ten 

 feathers. 



Cypselus ILLIG. (characters of the section). Bill short, with 

 culm en distinct, curved. Feet short. (Toes almost equal, the three 

 anterior composed of three phalanges.) Wings very long, with 

 quills narrow. 



Callocalia GRAY. Three toes facing forward, hallux backward. 

 Wings with second quill longest of all. Tail moderate, even or 

 subemarginate. 



Sp. Cypselus esculentus, Hirundo esculenta L., BRISS. Ornitk. n. Tab. 46, 

 fig. 2, Amboyna; Cypselus nidificus, Hirundo nidifica LATH., Hirundo 

 fuciphaga SHAW; Ceylon, Borneo, Sumatra, &c. Species of which the 

 nests are glutinous and eatable. Compare V. SCHEERBBAND in Arch. f. 

 Naturgesch. 1840, s. 393. 



Cypselus ILLIG., GRAY et recent. Tarsi hirsute. Hallux turned 

 forwards (pedes adhamantes) or versatile. Wings with second 

 quill longest of all, in some with first two subequal. Tail forked. 



Sp. Cypselus murarius TEMM., Hirundo Apus L., BUFF. PL enl. 542, fig. i, 

 LESS. Ornith. PL 34, fig. i, NAUM. Taf. 147, fig. 2 ; the common surift, le 

 martinet, die Thurmschwalbe; brown-black with white throat; Europe, 

 North Africa; Cypselus alpinus TEMM., Hirundo melba~L., VIEILL. Gal. 

 PI. 121, NAUM. Taf. 147, fig. i ; South of Europe, Africa to the Cape; 

 larger, grey-brown, with throat and hind part of body white. 



Cypselus cayennensis, Himndo cayennensis GM., BUFF. PI. enl. 725, fig. 

 2 ; in this South American species not only the tarsi, but also the toes are 

 entirely feathered ; CABANIS forms from it his genus Panyptila. 



Acanthyllis BOIE, Pallene LESS., Hemiprocne NiTZSCH. Three 

 toes anterior; hallux posterior. Tarsi naked. Tail even, short, 

 with feathers naked at the points, pungent or acuminate. 



Sp. Acanthyllis senex, Cypselus senex TEMM. PI. col. 397; Brasil; brown with 

 head grey, the tail-feathers terminating in points, but the shafts not pro- 

 jecting; the second flag-feather is the longest, the first shorter than the 

 third. In the other species the shafts of the tail-feathers terminate in 

 sharp points ; the first flag-feather is the longest or at least longer than the 



