100 TROGLODYTIDZ. 
albicante. Long. tota 4:4, ale 1:9, caude 1-7, rostri a rictu 0°8, tarsi 08. (Descr. maris ex ins. Socorro. 
U.S. Nat. Mus. no. 58259.) 
Hab. Mexico, Socorro Island (Grayson * ? *). 
In the tint of the upper plumage this Wren resembles 7. wedon; but the back is 
rather greyer in colour. Beneath it is nearly white, without dusky markings. T. inter- 
medius is altogether a browner bird both above and below; and from it, and also from 
T. aedon, T. insularis differs in its long slender curved bill and in the greater distinct- 
ness of the superciliary line. 
Grayson, the only naturalist who has seen it, describes the Socorro Wren as the 
commonest bird on the island, where its song is to be heard throughout the day, 
either amongst the trees or brush-covered rocks that crop out everywhere. Like all 
the indigenous birds of the island, it was very tame, and would climb about old logs 
or creep over the trunks of standing trees, and even turn over leaves at his feet in 
search of food, every now and then stopping to utter from a twig a cheerful song of 
considerable volume for so small a bird?. He adds that he often saw it feeding on 
dead land-crabs, crustacea being eaten more or less by all the birds of the island except 
the Parrots and Pigeons ®. 
Grayson describes! the iris of the living bird as brown, the bill brown above, the 
mandible paler, the feet brown with black nails. 
3. Troglodytes intermedius. 
Troglodytes intermedius, Cab. J. f. Orn. 1860, p.407'; Baird, Rev. Am. B.i. p. 142°; Lawr. Ann. 
Lyc. N. Y. ix. pp. 93°, 199%. 
Troglodytes aedon, Scl. & Salv. Ibis, 1859, p. 9°; Salv. Ibis, 1866, p. 202° (nec Vieillot). 
Troglodytes hypaedon, Scl. P. Z. 8. 1861, p. 128", 1862, p. 18°. 
Troglodytes, sp.?, Scl. P.Z.S. 1859, p. 372°. 
Troglodytes inquietus, Lawr. Aun. Lyc. N. Y. ix. p. 93° (nec Baird). 
Supra brunneus, alis et cauda fusco-nigro frequenter transfasciatis ; subtus pallidior, hypochondriis vix, crisso 
distincte nigro transvittatis, rostri maxilla brunnea, mandibula et pedibus corylinis. Long. tota 4:5, 
ale 2:1, caude 1-75, rostri a rictu 0°75, tarsi 0°7. (Descr. exempl. ex Duefias, Guatemala. Mus. nostr.) 
Hab. Mrxico® °, Totontepec and Capulalpam (Boucard®), Merida, Yucatan (Schott 4, 
Gaumer); GUATEMALA, Duefias, Panajachel, Quezaltenango, Coban, &c., and in all 
villages throughout the country (0. 8S. & Ff. D. G.); Costa Rica, San José and 
Quebrada Honda (Hoffmann 1), San José and Barranca (Carmiol *). 
This is the common House-Wren of Guatemala and Costa Rica, being doubtless 
found in the intermediate country. It also spreads northwards to Yucatan and the 
Mexican State of Oaxaca, though we have as yet no record of it from Tehuantepec nor 
yet from Western Mexico. In Eastern Mexico its place seems to be taken by 7’ aedon; 
