124 MNIOTILTIDA. 
Birds’ rest on peculiarities of colour. ‘They seem fairly natural; and we adopt them 
here. 
A. Cauda macula magna flava in pogonio interno aut flavo late intus marginata. 
1. Dendreca xstiva. 
Motacilla estiva, Gm. Syst. Nat. 1. p. 996". 
Rhimamphus estivus, Scl. P.Z.S. 1856, p. 1417, 1857, p. 202°; Cab. J. f. Orn. 1860, p. 3264. 
Dendreca estiva, Scl. P. Z. 8.1859, p. 363°; Scl. & Salv. Ibis, 1859, p.11°; P. Z. S. 1864, p. 3477, 
1870, p. 836 °, 1879, p. 494°; Cassin, Pr. Ac. Phil. 1860, p.191°°; Lawr. Ann. Lye. N. Y. 
Vii. p. 822", viii. pp. 174°, 179”, ix. pp. 94, 200"; Mem. Bost. Soc. N. H. ii. p. 269"; 
Bull. U.S. Nat. Mus. no. 4, p. 15; Baird, Rev. Am. B.i. p. 195; Salv. P. Z.S. 1867, 
p-. 186%, 1870, p. 183”; Sumichrast, Mem. Bost. Soc. N. H. i. p. 547"; v. Frantz. J. f. 
Orn. 1869, p. 293”; Baird, Brew. & Ridgw. N. Am. B. i. p. 222%; Coues, B. Col. Vall. i. 
p. 252, 
¢ flava, dorso viridescente, gastro toto castaneo striato ; alis et cauda fuscis, extus et intus flavo limbatis ; rostro 
plumbeo, pedibus carneis. Long. tota 4°7, ale 2°5, caude 1-9, rostri a rictu 0°5, tarsi 0°7. (Descr. maris 
ex Duefias, Guatemala. Mus. nostr.) 
© mari similis, sed strie corporis subtus absunt. (Descr. feminw ex Retalhuleu, Guatemala. Mus. nostr.) 
Hab. Norrn America generally ?3.\—Mextco, Mazatlan (Grayson 1°), Colima (Xantus 16), 
Jalapa and San Andres Tuxtla (Sallé*), Jalapa (de Oca®), Orizaba (Sumi- 
chrast 71), Merida, Yucatan (Schott !°), Barrio, Chihuitan, Guichicovi, and Santa 
Efigenia (Swmichrast"); GuateMaLa®, Duefias, Retalhuleu, San Geronimo, Tactic, 
Coban, Cahabon (0. S. & F. D. G.); San Satvapor, La Libertad (J. MM. Dow 38), 
La Union (0. S.); Honpuras, San Pedro (G. MM. Whitely®); Nicaragua, Greytown 
(Holland 3); Costa Rica*, San José (v. Frantzius**, Carmiol 1+), Candelaria 
Mountains (v. Prantzius**); Panama, David (Bridges, Hicks }*), Bugaba, Cordillera 
del Chucu, Chitra, Calovevora, Calobre, and Santa Fé (Arcé °°), line of railway 
(M‘Leannan''"), Turbo (W. S. Wood 1°).—CotomB1a®, Ecuapor, GUIANA, ‘TRINIDAD. 
The Summer Warbler or Summer Yellow-bird, by which names this species is known 
in North America, is one of the commonest of Mniotiltide, and in the summer season 
spreads itself throughout the whole North-American continent, and breeds over an area 
extending from the confines of the Arctic Ocean to the frontier of Mexico, and from the 
Atlantic to the Pacific Oceans?3. During the winter months it passes southwards to 
Mexico, Central America, and the whole of the northern portion of South America from 
Guiana to Ecuador, and is one of the most abundant of its family in Guatemala and 
elsewhere at this time of year, ranging from the sea-level to a height of 5000 or 6000 
feet. D. westiva has not yet been detected in any of the West-India Islands (except 
Trinidad), not even as a bird of passage, though many of these islands lie directly in the 
path the birds of the Eastern States must take when flying to the northern part of 
South America. We can only suppose that the presence in these islands of a number 
