490 



APPENDIX. 



23. Sub-genus, PARISOMA. (Generis Pari.) 



Rostrum breve, basi latum, lateribus valde 

 compressis, culmine £ basi arcuato, apice 

 emarginatd. Nares magna;, fere nudce. Vi- 

 brissas mastacales. Ala; breves, rotundatce. 

 Cauda gradata. Tarsi elongati. Digiti late- 

 rales cequales ; hallux validus, digito medio 

 brevior. 



Bill short, the base wide, the sides much 

 compressed, culmen arched from the base, 

 the tip notched. Nostrils large, nearly naked. 

 Rictus bristled. Wings short, rounded. Tail 

 graduated. Tarsi lengthened. Lateral toes 

 equal ; hinder toe strong, shorter than the 

 middle toe. 



Type. — Le Grignet, Le Vaill., Ois, cTAfr., iii., pi. 126, f. 1. 



24. Genus, LESSONIA. 



Rostrum breve, depressum, triangulares 

 apice aduncd, culmine recto. Vibrissas mas- 

 tacales. Alas longat, acuminata;, remigibus 

 quatuor prioribus aqualibus. Cauda aqualis. 

 Tarsi longissimi, graciles. Digiti laterales 

 aquales. Ungues vix curvati, posticus lon- 

 gissimus. 



Bill short, depressed, triangular, the tip 

 abruptly hooked, culmen straight. Rictus 

 bristled. Wings long, pointed; the first four 

 quills of nearly equal length. Tail even. 

 Tarsi very long, slender. The lateral toes 

 equal. Claws very slightly curved ; hind 

 claw very long. 



Type. — Anthus sordidus, Lesson. Chili. Mus. Nost. 

 Obs. — I may be allowed to mention the discovery of this highly interesting bird as a singular corroboration of the 

 opinions expressed at p. 203 and 230. It is unquestionably the fissirostral type of the Motacillince, and seems to render the 

 rank of Seiurus, as a sub-genus of Accentor, no longer doubtful. By the kindness of M. Lesson, I am possessed of a 

 specimen from the coast of Chili ; and as I see no reason why botanists only should be commemorated by generic names, 

 I trust I may be allowed to designate this new genus after the enterprising Zoologist by whom it was discovered. 



Family, AMPELID^. 

 Sub-family, LEIOTRICHAN.E. Nob.» 



Pedes magni, validi, syndactyli. Tarsi 

 elevati. Hallux digito externo longior. Un- 

 gues valde curvati. 



Feet large, strong, syndactyle. Tarsi ele- 

 vated. Hinder toe longer than the outer. 

 Claws much curved. 



25. Genus, LEIOTHRIX. 

 Rostrum breve, valde compressum, culmine Bill short, much compressed, the culmen 



gradatim arcuato, emarginatum. Nares 

 magna;, membranacece, foramine lineari, late- 

 rali. Alas breves, maxime rotundata:. Cauda 

 mediocris, forficata. 



gradually curved, notched. Nostrils large, 



membranaceous ; aperture linear, lateral. 



Wings short, much rounded. Tail moderate, 

 deeply forked. 



Type — Parus furcahcs, Temm. PI. Col. India. 



