On the arrangement of the genera of Birds. 397 



Motadlla. Aud, — Budytes, Cuv. — Euicurus. Temm. — Jn* 



thus. Bechst. — Corydalla.* — Megalurus. Horsf. 

 ***** Subfam. Saxicolina. 

 Saxicola, Bechst. [(Enanthe. Vieiil.'] 



V. Fam. PiPiiiDiE. [Gen. Parus. Pipra. Ampelis. Linn.] 

 ^githalus.+ — Parus. Linn. — Megistina. Vieiil. —* Parda- 

 lotus. Vieiil. — Pipra. Linn. [Manacus. Briss,'\ — Rupicola. 

 Briss. — Calyptomena. J Raffles. — Phibalura. Vieiil. — 

 Bombycilla. Briss, — Ampelis. Aud. [Cotinga. Briss. 

 Tersa. Vieill.W} — Procnias. Hoffm. Casraarhynchus. 



* CORYDALLA. 



Rostrum subelongatum, subforte. 



AliS caudaque ut in genere Antho. 



Pedes subgraciles; tarsis elevatis, hallucis ungue elongate, recto. 



Typus genericus. Anthus Richardi, Vieiil. 



+ ^GITHALUS. 



Rostrum subelongatum, tenue, rectum, acutum, conicum, basi subtrigonum, 

 culmine inter plumas capitis retrorsum extendente ; naribus setis opertis. 



Alee mediocres, rotundatae : remige Imi brevissimS,, fere spuria,, 2da et 7m& 

 aequalibus, StiS, 4ta et 5ta fere eequalibus longissimis, 6ta paulo breviore ; 

 StisB ad 5tam inclusam pogoniis externis prope medium leviter emarginatis. 



Pedes mediocres ; acrotarsiis scutellatis, paratarsiis integris ; digitis liberis, 

 halluce subforti, ungue longo forti. 



Cauda mediocris, subfurcata. 



Typus genericus. Parus pendulinus. Linn. 



:{: I have some doubts whether this genus is more nearly allied to the 

 Pipridee or Todidoe^ in either of which families it may be placed according to 

 its external characters. Its vegetable food [see Linn. Trans, vol. XIIL 

 p. 296] however seems to place it as above with the Berry-eaters. The juxta- 

 position of these two families renders it immaterial to which of them it may 

 eventually be referred. 



II I cannot exactly say whether I have placed M. Vieillot's genus Tersa iu 

 its right place as a synonym to the Ampelis. Auct. The " Tersine" of M. 

 BufFon, to which M. Vieillot refers as the type of the genus, is supposed to 

 be the female of another species, which comes into the true Ampelis. Judging 

 from the characters he has given, I rather incline to think his Ampelis corres- 

 ponds with M. Temminck's Casmarhi/nchus, and his Tersa with the true Ampelis 

 as stated above. 



