THRYOTHORUS. 91 
obtained by the French traveller Delattre. Both these names are now admitted to 
apply to the same species. We have examined many specimens from the State of 
Panama, and find them to vary slightly in the width of the black pectoral band and in 
the number of the white cross bars of the underparts. In none, however, is the former 
So narrow or the latter so wide as in Mr. Wolf’s representation of T. albigularis 8, 
Nothing has been recorded of the habits of the species, which appears to be strictly 
confined to the low-lying hotter districts of the countries in which it occurs. Remedios, 
the elevation of which is a little over 2300 feet, is probably at the limit of its range in 
altitude ; thence it descends to the level of the sea. 
2. Thryothorus atrigularis. (Tab. VI. fig. 4.) 
Thryothorus atrogularis, Salv. P. Z.S. 1864, p. 580; Lawr. Ann. Lyc. N. Y. ix. p. 92”. 
Pheugopedius atrogularis?, Lawr. Ann. Lyc. N. Y. viii. p. 179°. 
Castaneus, pectore, gula et capitis lateribus nigris, his cum superciliis obscure albo maculatis; alis et cauda 
fuscis, illis extus castaneis, hac aliquando septem fasciis pallidis transvittata ; tectricibus subcaudalibus et 
campterio alari nigris albido transfasciatis; rostro et pedibus nigris. Long. tota 5:3, alee 2°9, caude 2°4, 
rostri a rictu 0°85, tarsi 1-0. (Descr. exempl. ex Tucurriqui, Costa Rica. Mus. nostr.) 
Hab. Nicaracua, Greytown (Holland)? Costa Rica, Tucurriqui (Arcé 12), 
Three specimens of this Wren were included in a large collection of bird-skins 
formed by Enrique Arcé at Tucurriqui and elsewhere in Costa Rica. These are all the 
examples that have come under our notice; for Mr. Lawrence, in including the species 
in his list of Costa-Rica birds, refers to Arcé’s specimens, none having at that time 
reached the Smithsonian Institution, upon whose collections the list was founded. The 
species is included with doubt in Mr. Lawrence’s list of the collection of birds made 
near Greytown by Mr. H. E. Holland?. 
T. atrigularis has no near allies that we are acquainted with, being a remarkably 
distinct species, having an appearance recalling certain Formicariide. Of its habits 
nothing has been as yet recorded. 
b. Rostrum mediocre, gula nigro maculata. 
8. Thryothorus hyperythrus, sp. n. 
Thryothorus rutilus, Lawr. Ann. Lyc. N. Y. vii. p. 320'; Salv. P. Z.S. 1867, p. 134, 1870, p- 181° 
(nec Vieillot). 
Supra murino-fuscus, capite paulo rufescentiore, alis dorso concoloribus, cauda nigro regulariter transfasciata ; 
capitis lateribus et gula nigris albo distincte variegatis ; subtus ferrugineus, pectore paulo rufescentiore, 
crisso albicante nigro transfasciato; rostro et pedibus plumbeis. Long. tota 5°5, ale 2-3, caude 2:0, rostri 
a rictu 0°85, tarsi 0-9. (Deser. exempl. ex Paraiso, Panama. Mus. nostr.) 
Obs. T’. rutilo affinis, sed abdomine medio ferrugineo nec albo distinguendus. 
Hab. Panama, Bugaba, Boqueti, Chitra, Calovevora, Santa Fé, and Santiago (Arcé 2 3), 
line of railway (J/‘Leannan'), Paraiso station (Hughes). 
This Wren is a near ally of Thryothorus rutilus, Vieillot, under which name it has 
12* 
