. AVES. 475 



Compare on this genus and this entire family MENETRIES Monographic 

 de la famille des Myiotherince, M6m. de I' A cad. de St Petersb. vie Se'rie, 

 Tome vi. Sc. mathem. et not., 1835, pp. 443 543. 



a) With outer toes concrete at the base only. 

 Myiothera auctor. 



Sp. Myiothera colma, Turdus colma GM., BUFF. PL enl. 703, fig. i ; Myiothera 

 tetema, Turdus cayennensis? and Turdus colma var. /3 GM., &c. 



b) With outer toes united together. 



Conopophaga YIEILL. Bill short, depressed at the base. 



Sp. Myiothera lineata MAXIM., Conopophaga vulgaris MENETR. 1. 1. PI. 14; 

 Myiothera aurita, Turdus auritus L., BUFF. PL enl. 822. 



Pithy s YIETLL. Outer toes free at the apex only. Tarsi covered 

 on the outside with a horny scute, on the inside with naked 

 skin. 



Sp. Myiothera albifrons LICHTENST., Pipra albifrons GMEL., Pithys leucops 

 VIEILL., Dasycephala albifrons SWAINS., GRAY, BUFF. PL enl. 701, fig. i, 

 VIEILL. Qaler. des Ois. PI. 129, &c. 



Formicivora S WAINS., GRAY. Bill moderate, acuminate. Wings 

 "omewhat short, rounded, with fifth and sixth quills subequal, 

 mgest of all. Outer toes conjoined at the base only. Tail some- 

 what long, graduated. 



Sp. Formicivora grisea STRICKL., Motacilla grisea GM., Formicivora leucophrys 

 GRAY, BUFF. PL enl. 643, fig. i, &c. 



Thamnophilus VIEILL. (exclus. of some species; species of 

 Lanius auctor.) Bill strong, compressed, with tip of upper man- 

 dible hooked, emarginate before the hook. Tarsi moderate, covered 

 posteriorly and on both sides with small scutes. Outer toes con- 

 joined at the base only. Wings with fourth, fifth and sixth quills 

 subequal, fifth mostly longest of all. Tail long, graduated, with 

 feathers rounded. 



Sp. Thamnophilus doliatus VIEILL., Lanius doliatus L., BUFF. PL enl. 297, 

 fig. 2, &c. ; South American species, mostly of the size of a starling, some 

 larger, as Thamnophilus striatus QUOY and GAIM., Thamnophilus gigas 

 SWAINS., Voyage de I'Uranie, Ois. PL 18, 19. 



Family XXXYI. Colopteridce CABANIS, Cotingidce BONAP. 

 Wings moderate, with ten primaries; some of the first quill-feathers 

 mostly narrowed towards the point, or the second in males im- 

 perfect, abbreviate. Cubital coverts short. Tarsi covered anteriorly 



