190 VIREONIDA. 
Hab. Nortu America, Texas !°17—Mexico (Sallé?), Monterey (Couch 18), Mazatlan 
(Grayson ®), Tres Marias (Forrer), Rosario (Xantus®), temperate region of Vera 
Cruz (Sumichrast!*), Playa Vicente (Boucard*), Tapana and Santa Efigenia 
(Sumichrast §), Northern Yucatan (Gaumer); GuaTEMALA (Constancia*), Retalhuleu, 
Chisec (0. S. & F. D. G.); Nicaragua, San Juan (barruel+); Cosra Rica 13°, San 
José (v. Frantzius’), Atenas (Cooper), Volcan de Irazu (Rogers); Panama (Bell 4), 
Mina de Chorcha !!, Bugaba ™, Chitra 14, Cordillera de Tolé !°, Santa Fé ! (Arcé), 
line of railway (J/‘Leannan®), Obispo station (O. S.), Paraiso station (Hughes).— 
CoLomsBiaA; Ecuanor; Peru ?>; Upper AMAZONS. 
The most recent opinion as to the position of this species is that given by 
Mr. Ridgway *4, who treats it as an imperfectly segregated race of V. agilis, thus 
differing from Dr. Finsch, who placed the latter name as a synonym of V. olivaceus. 
The relationship of V. agilis to the other forms is somewhat intermediate, as it has the 
olive crissum and flanks of V. flavoviridis, but to a less extent, and like V. olivaceus 
shows a whiter belly. Compared with V. olivaceus, V. flavoviridis is obviously distinct, 
and may be so treated in this work. 
Though this species has only just a footing in the United States, having been found 
on the Texas side of the Rio Grande, near Fort Brown '*, it seems to be generally 
distributed throughout Mexico and Central America, having been observed, as will be 
seen above, in nearly every section of this wide area. In South America, too, it has a 
wide range, from Colombia to Peru 1°, and eastwards to Yquitos on the Amazons. From 
the last-mentioned place we have a single female specimen, sent us by Mr.Whitely, which 
was shot on the 16th October, 1878. It may thus well be that the birds observed in the 
far south are there during the winter season only. In the north it has been observed 
late in August at Fort Brown 1°, and at Mazatlan from April to August. Grayson says 
it is not uncommon in the mangrove swamps near the last-named city, but that he did 
not see any after the breeding-season 9. 
Mr. A. Forrer has recently sent us a single skin of a male bird which he shot on 
4th May, 1881, on one of the Tres Marias Islands. This, though generally resembling 
the usual form of this bird, has but the faintest indication of the light superciliary 
mark. In the absence of any other character, and having only one specimen for 
comparison, we do not think more notice should be taken of it at present. 
Regarding the range in altitude of V. flavoviridis, Prof. Sumichrast tells us he 
observed it, at a height of 4600 feet, in the mountains of Orizaba!2; but our Guatemalan 
specimens are all from a lower level. In Panama, too, whence Cassin’s original 
specimens were obtained, it occurs in places but slightly elevated above the sea. 
Nothing is known relative to the breeding of this species. 
