AVES, 475 



Compare on this genua and this entire family Men^tries Momc/raphie 

 de la famille des Myiotherhue, Mem. de VAcad. de St Petersb. vie S^rie, 

 Tome VI. Sc. mathcm. et nat., 1835, pp. 443 — 543. 



a) With outer toes concrete at the base only. 



Myiothera auctor. 



Sp. Myiothera colma, Turdus colma G-M., Buff. PI. enl. 703, fig. i ; — Myiothera 

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



b) With outer toes united together. 



Conopophaga Yieill. Bill sliort, depressed at the base. 



Sp. Myiothera lineata Maxim., Conopophaga vulgaris Menetr. 1. 1. PI. 14; — 

 Myiothera aurita, Turdus aurittis L., Buff. PI. enl. 822. 



Pithy s Yieill. Outer toes free at tlie apex only. Tarsi covered 

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

 skin. 



Sp. Myiothera albifrons Lichtenst., Pipra albifrons GMEli., Pithys leucops 

 ViEiLL., Dasycephala albifrons Swains., Gray, Buff. PL enl. 701, fig. x, 

 ViEiLL. Galer. des Ois. PI. 129, &c, 



Formicwora SwAiNS., Geay. Bill moderate, acuminate. Wings 

 "omewliat sliort, 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. PI. enl. 643, fig. i, &c. 



ThamnopMlus 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. PI. enl. ig'j, 

 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 VUranie, Ois. PI. 18, 19. 



Family XXXVI. Colopteridm Cabanis, Cotingidm 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 



