of American Thamnophili, 91 



from T. ambiguus it may be also known by its shorter tarsi, and 

 by not having all the tail feathers marked by a pair of white 

 oblong spots. 



The Trachet of Le Vaillant seems to be, without doubt, the 

 same species as the L. ncevius of Latham and Leach, the form and 

 colour of the tail in both perfectly agreeing. Dr. Shaw has, 

 however, made the Trachet into a distinct species, adding gratu- 

 itously, that the feathers of the head are lanceolate. 



Length of the wings 2|, tail 2, tarsi scarcely |. 



Var. a ? T. ambiguus. 

 T. supra cinereuSf infra pallidior : vertice nigro ; remigum nigro- 



rum margine albo / rectricium obtusarum apicibus fasciaque 



interrupta albis. 

 T. above cinereous ; beneath paler ; crown black, quills black 



margined with white ; tail feathers obtuse, the tips and a 



central interrupted band, white. 



Two birds brought to England fiom Minas Geraes by Dr. Such, 

 are now before me, agreeing in general disposition of colours 

 with the last, yet presenting certain characters which may prove 

 important. 



Their size is, in a trifling degree larger ; the quills are deep black 

 margined externally, (except at their base) with white ; the tail 

 is half an inch longer; but, from the length of the covers, it ap- 

 pears very short ; it is black, rounded, tipt Avith white, and ob- 

 tuse ; each feather in the middle having a pair of large snowy 

 oblong spots adjoining their margins ; the tarsi are one-tenth of 

 an inch longer, and the inner tcing-covers yellowish white, spu- 

 rious quills black. 



Total length about 5|, bill l^, wings 2^«^, tail 2|, tarsi J^. 



+ Var. /3 ? T. pileatus. 

 T. supra cinereus, infra pullldior ; uropj/gio pectorisque later ibus 



fulvis ; vertice nigro; remigum fnscorum 7nargine iestaceo ; 



rectricium acutarum apicibus lineaque marginali cdbis^ 

 T. above cinereous ; beneath paler; rump and sides of the breast 



fulvous, crown black, quills brown margined with fulvous; 



tiiil feathers pointed, tips and marginal line white. 



