Mr. Swainson on several new groups in Ornithology. 357 



Cauda obiusa, debilis, cequalis. 

 Pedes graciles ; halluce sublongo. 



Bill moderate, slender, attenuated, straight, notched. Tongue 

 lengthened ? the top acute. Wings moderate, attenuated ; the 

 first and fourth quill equal ; the second and third equal and 

 longest. Tail rounded, obtuse and soft. Feet slender, hind 

 toe rather lengthened. 



To the accurate observations of Wilson we are indebted for a 

 correct knowledge of this bird, uniting the essential characters 

 of a Creeper^ with the external form of a Sylvia. 



Family Trochilidce. 



TROCHILUS. 



Rostrum rectissimum. 

 Cauda mediocris, cequalis, vel rotunda. 



Types. 1 . T. superbus, Shaw. 2. pileatus, Lath. 3. collaris, L 

 4. 0. M. a double huppt. Temm., PI. col. 18. f. 3. 



Bill very straight. Tail moderate, equal, or rounded. 



- CYNANTHUS. 



Rostrum rectum, vel sub-arcuatum. 



Cauda longissima, forjicata. 



Types. 1.^ T. colubris, L. 2. macrourus, L. 3. platurus, Sh. 



4. bifurcatus, Sw. ined. 5. 0. M. a queue singulaire. Temm., 



PI. col. 18. f. 2. 



Bill straight or very slightly curved. Tail very long, forked. 



-HPHGETHORNIS. 



Rostrum elongatum, arciiatum. 

 Cauda elongata, gradata vel cuneata. 



Types. 1. T. superciliosus, L. 2. Col. tachete? Temm., Pi. col. 

 120. f. 3. 3. T. chri/sobronchos, Shaw. 



Bill elongated, arched. Tail lengthened, graduated or cuneated. 



