900 FORMICARIID&. 
Supra saturate cinnamomeus, alis extus et cauda concoloribus; capite toto et cervice nigris, plumis omnibus 
stria rhachidali alba notatis: pectore et abdomine cinereo-fuscis, plumis quoque obscuriore et latiore albido 
striatis; ventre imo et tectricibus subcaudalibus rufescentibus ; subalaribus et remigibus intus cina- 
momeis: rostro nigricanti-plumbeo, mandibula pallidiore, pedibus plumbeis. Long. tota 6-0, ale 3-0, 
caudee 2-4, tarsi 1:0. (Descr. exempl. typ. ex Colombia. Mus. Brit.) 
Hab. Panama, Turbo (Lieut. Michler 3 2). 
The type of this species has been kindly sent to us from Philadelphia, it being the 
property of the Academy of Natural Science of that city. It is in poor condition, the 
- bill being much injured. The species is closely allied to Thamnophilus nigriceps, Scl. 
(cf. Cat. Birds Brit. Mus. xv. p. 194, t. 12), and indeed before we placed the types 
together we were under the impression that they belonged to one species. Compared 
with 7. nigriceps the wings and tail of 7. virgatus are clearer cinnamon, the shaft- 
stripes of the head considerably wider, the head thus being not nearly so dark; the 
stripes, too, of the under surface are wider and more numerous on the abdomen instead 
of being confined to the central portion; the under surface of the wings and inner edge 
of the quills are cinnamon and not fawn-colour, as in 7. nigriceps. 
The two birds are peculiar in their style of plumage, and unlike any other members ~ 
of the genus Thamnophilus. In their striated head and neck they resemble 7. bridgesi, 
but that bird has no cinnamon colour in its plumage. 
The only known example of this bird is the type, which was obtained during Lieut. 
Michler’s Expedition to Darien. Cassin did not give it a name in his list of the birds, 
but Mr. Lawrence described it in 1868. 
8. Minimus: rostrum debile ; ptilosis cinerea ; ale rotundate, remigibus albo limbatis ; 
tectricibus albo maculatis; sexus dissimiles. 
6. Thamnophilus atrinucha, sp. n. 
Thamnophilus nevius (nec Gm.), Cassin, Pr. Ac. Phil. 1860, p. 1881; Scl. & Salv. P. Z.S. 1864, 
p. 855°; 1879, p. 524°; Lawr. Ann. Lyc. N. Y. ix. p. 107*; Salv. P.Z. 8. 1867, p. 144’; 
Boucard, P. Z.S. 1878, p. 60°; Ridgw. Pr. U.S. Nat. Mus. x. p. 5907; Tacz. Orn. Pér. 
i. p. 8°; Zeledon, An. Mus. Nac. Costa Rica, 1887, p. 114°; Scl. Cat. Birds Brit. Mus. 
xv. p. 197 (partim) °°. 
Thamnophilus amazonicus, Lawr. Ann. Lyc. N. Y. vii. p. 325 (nec Sel.) 4. 
Cinereus, pileo et dorso medio nigris, hoc plaga magna celata alba notato; alis nigris extrorsum cinereo limbatis, 
tectricibus alarum et caude superioribus nigris distincte albo terminatis ; cauda nigra, rectricibus omnibus 
albo terminatis, rectrice extima utrinque quoque macula mediana in pogonio externo notata: subtus 
dilutiore cinereus, subalaribus et remigibus internis intus albis: rostro et pedibus nigris. Long. tota 5-5, 
alee 2‘7, caude rectr. med. 2°15, rectr. lat. 1:8, rostri a rictu 0-9, tarsi 0:9. 
© brunnea, capite rufescente macula dorsali celata alba, alarum marginibus et maculis tectricum terminalibus 
cervinis; rectricibus cervino-albido terminatis, externis utrinque macula mediana in pogonio externo 
ejusdem coloris; subtus multo pallidior, gula grisescente. (Descr. maris et feminee ex Panama. Mus. 
nostr.) 
Hab. Hoxpuras, Puerto Caballo and Medina (G. M. Whitely !°), Segovia river (Towns- 
end"); Costa Rica, Angostura and Pacuare (Carmiol4, Zeledon®), San Carlos 
