Birds from British Guiana. 451 



utrinque extimis quoque macula alba extiis medialiter 

 ornatis ; subtus obscure cinereis^ gutture paulo satura- 

 tiore ; crisso albo terminato ; rostro et pedibus nigris : 

 long, tota Q-Q, alae 0*3, caudge rectr. med. 2*7, lat. 2-0, 

 rostri a rictu 0*8^ tarsi 0-9. 

 9 mari similis^ pileo antico albo interuaixtO; postico Isete cin- 

 namomeo-brunneo distinguenda. 

 Hub. in monte "Koraima^^ dicto^ Guiana Brit. 

 Mus. nostr. 



Of this beautiful Thamnophilus Mr. Wliitely obtained 

 several specimens, at an elevation of about 5000 feet, on the 

 slopes of Roraima. The species is quite distinct from any 

 known to us, the sexual difference in the colouring of the 

 head being peculiar. 



Grallaria simplex. 

 G. brevicaudce certe affinis et supra ejusdem coloris, subtus 

 pectore unicolore griseo hand striato et hypochondriis 

 griseis differt : long, tota 5*5, alse 3"2, caudse \7, rostri 

 a rictu 0*9, tarsi \7. 

 Hah. in monte " Roraima '^ dicto, Guiana Brit. 

 Mus. nostr. 



This species at first sight recalls G. brevicauda, a lowland 

 bird, the place of which it seems to take in tlie higher 

 mountains. The plain ash-coloured chest at once distin- 

 guishes it. 



Mr. Whitely secured a small series of this Grallaria, at an 

 elevation of about 5000 feet, on the slopes of Roraima. 



Petasophora germana. 

 P. anai affinis et ejusdem staturse, sed gula multo magis 

 c?erulea, gutture quoque toto cserulescentiore et fronte 

 Cccruleo suifusa distinguenda. 



Hab. in monte " Roraiiua^^ dicto, Guiana Brit. 



Mr. Whitely obtained a pair of this species in the neigh- 

 bourhood of Roraima, the male at an elevation of 5000 feet, the 

 female at 6000 feet. Though the difference between the pre- 

 sent bird and P. anais of the Andes is not great, we feel justi- 

 fied in separating them, the ranges of the two being doubtless 

 broken ])y the low-lying lands of the Orinoco valley. It is, 



