VIREO. 189 
Central America and Colombia as far as the neighbourhood of Bogota. In Guiana, 
the Amazons valley, the province of Bahia in Brazil, and Eastern Bolivia we find a 
rather brighter-coloured bird, whose wing has the outer primary shorter than the fifth. 
This appears to be V. agilis or V. chivi, as it seems probable that these names apply to 
the same bird. On this latter point our materials are incomplete, as we have only one 
skin from Buenos Ayres, and this hardly differs from the more northern bird. On the 
whole we are disposed to keep V. chivi (vel agilis) distinct from V. olivaceus, of which the 
latter only immediately concerns us here. Prof. Baird, however, on the faith of a 
single skin supplied him by Gould, traces V. agilis to Guatemala? 1; but, in the absence 
of any other testimony, we hesitate to follow him in this point. Accurate records of the 
localities of his specimens of birds was never a matter of much consequence to Gould ; 
and it may easily be that a mistake occurred in this case. 
Vireo olivaceus, as thus restricted, is a very common bird in the Eastern States of 
North America, spreading westwards to the Rocky Mountains, and northward to the 
shores of Hudson’s Bay, outlying stragglers having reached Greenland, and even 
England. In its southern migration, though it occurs in Texas, it has only once been 
recorded from Mexico®; and it is equally rare in Cuba", In Guatemala it, though 
not common, has been more frequently met with, and as high as 5000 feet in the 
Volcan de Fuego near Duefias. But it does not seek only a mountain retreat in 
winter ; for the records of its occurrence in Honduras and Panama give places at or 
near the sea-level where specimens have been obtained. In Costa Rica and Colombia 
it again affects the mountains. 
The pensile nest of V. olivaceus is well known in the States. It is placed between 
twigs of a forest tree, and is composed of fine strips of bark, fibres of plants, webs of 
spiders, &c. ‘These are woven into a compact nest, which is always dependent from 
the twigs to which it is attached. The eggs are clear white, marked (chiefly at the 
larger end) with widely diffused spots and dots of red-brown 2. 
8. Vireo flavoviridis. 
Vireosylvia flavoviridis, Cassin, Pr. Ac. Phil. v. p. 153°; Scl. P. Z. S. 1856, p. 298°; 1859, 
p. 875°; Scl. et Salv. Ibis, 1859, p. 12‘; Baird, Rev. Am. B. i. p. 836°; Lawr. Ann. Lye. 
N.Y. vii. p.323°; ix. p. 96"; Bull. U.S. Nat. Mus. no. 4, p- 17°; Mem. Bost. Soc. N. H. 
li. p. 272°; Salv. P. Z. 8S. 1867, p. 187"; 1870, p. 184%; Sumichrast, Mem. Bost. Soc. 
N. H.i. p. 547”; v. Frantzius, J. f. Orn. 1869, p. 295"; Baird, Brew. & Ridgw. N.-Am. 
B. 1. p. 366"; Tacz. P. Z. S. 1874, p. 509”; Merrill, Pr. U.S. Nat. Mus. i. p.125*°; Bull. 
Nutt. Orn. Club, iii. p. 1527”. 
Vireo flavoviridis, Baird, U.S. Bound. Surv., Zool., Birds, p. 12%; Coues, B. Col. Vall. i. p. 490°. 
Phyllomanes flavoviridis, Cab. J. f. Orn. 1861, p. 93”. 
Vireosylvia agilis flavo-viridis, Ridgw. Bull. U.S. Nat. Mus. no. 21, p. 19”. 
V. olivaceo similis, sed hypochondriis et crisso multo letius olivaceo-flavis distinguendus. (Descr. exempli ex 
Panama. Mus. nostr.) 
