188 VIREONID. 
The nest of Vireo calidris is described by Mr. E. Newton ® as shaped like an inverted 
cone, and composed outwardly of dried blades of grass, dead leaves, and wool, woven 
round the twigs, to which it was attached, with spiders’ webs, lined inside with finer blades 
of grass, and about three inches and a half in diameter and five in height. The eggs, 
three in number, are white, with a few black spots of different sizes chiefly dispersed 
about the larger end. This nest with its eggs was found on June 5th, 1858, in a man- 
chioneel tree in the island of St. Croix, and was suspended to the leafy part of a bough. 
2, Vireo olivaceus. ” 
Muscicapa olivacea, Linn. Syst. Nat. i. p. 3277. 
Vireosylvia olivacea, Scl. P. Z. 8. 1855, p. 1517; 1859, p. 863°; Scl. & Salv. Ibis, 1859, p. 12°; 
P. Z. 8. 1870, p. 836°; 1879, p. 495°; Baird, Rev. Am. B. i. p. 3337; Lawr. Ann. Lye. 
N.Y. ix. p. 96°; v. Frantzius, J. f. Orn. 1869, p. 295°; Baird, Brew. & Ridgw. N.-Am. B. 
i. p. 363"; Sennett, Bull. U.S. Geol. Surv. iv. p. 16%. . 
Phyllomanes olivaceus, Cab. J. f. Orn. 1860, p. 404°; Gundl. Orn. Cub. p. 55”. 
Vireo olivaceus, Dresser, Ibis, 1865, p. 480**; Coues, ‘B. Col. Vall. 1. p. 495”. 
Vireo bogotensis, Bryant, Pr. Bost. Soc. N. H. vil. p. 227°. 
Vireosylvia bogotensis, Lawr. Ann. Lyc. N. Y. viii. p. 6". 
Supra olivaceus, pileo cineraceo utrinque fusco marginato, loris fuscis, superciliis sordide albis; subtus albus, 
hypochondriis vix fusco-olivaceo indutis; rostro et pedibus corneis. Long. tota 5:0, alee 3-0, caude 2-0, 
rostri a rictu 0-7, tarsi 0-7. (Descr. exempl. ex Dueiias, Guatemala. Mus. nostr.) 
Obs. V. calidri similis, sine stria rictali fusca. 
Hab. Eastern NortH America, north to Hudson’s Bay, west to the Rocky Mountains? 4, 
Texas 1 *.—Mextco, Jalapa (de Oca?); Guatemata‘, Coban, Duefias (0. S. & 
fF. D. G.); Honpuras, San Pedro (G. M. Whitely®); Costa Rica, San José 
(Carmiol®°), Dota Mountains (Carmiol); Panama, line of railway (IM*Leannan 17), 
—CotomsBia 7616; Cupa®, 
Prof. Baird recognized four species of this form in his ‘Review of American Birds’?; 
but this number was reduced to two species, each with one variety, in the ‘ History 
of North-American Birds’!°, Of these, V. olivaceus and V. flavoviridis have been 
unanimously allowed to stand as species distinct from one another; but the others, to 
which the names V. agilis and V. chivi have been applied, have experienced very varied 
treatment. Dr. Finsch* considers that, putting aside V. flavoviridis, only one species 
can be recognized, which he calls V. olivacea; the differences in the proportional lengths 
of the primaries, upon which Prof. Baird placed so much stress, he looks upon as 
individual variations not to be associated with the birds of any one district. Our 
selected series of Vireos of the V. olivaceus type consists of twenty specimens; and 
these are separable into two, perhaps three, races by the test of their wings. First we 
have the true V. olivaceus with the outer quill about equal to or a little shorter than 
the fourth. This is the North-American bird, which extends, probably in winter only, to 
* P. Z. 8. 1870, p. 565. 
