Pe ee eet 
Ce rie Oe 
ME a? BER age Fk EL oT Shem pt a: 
tea 
es ae oe 
A Fae tee ee ee = pn ae Ch 
Sty wt ak See 
ON SOME NEW FORMS OF AMERICAN BIRDS. 611 
As a general rule South American species have shorter tails 
than the West Indian. 
It is a nice question what are really species in this genus, and 
what merely races or varieties; but it would probably be not far 
from correct to assume that the various forms described are simply 
modifications of one primitive species, produced by geographical 
distribution and external physical conditions. In the following 
diagnosis I shall treat all the varieties as occupying the same 
rank, without attempting any discrimination. Although but one 
of these belongs to the United States, and that as a straggler from 
the Bahamas, I give the table of the whole, to show the inter- 
esting relationship between them. 
COMMON CHARACTERS. Above dusky-olive or anager me Phage ee 
ceous or yellowish; the head and sae always blae 
than back. Chin and throat a 2: lack. Rest -” aa part erate daer 
be án d. 2 ee vey white str ene ab AW atch at 
bas ofp 8; gen 
tail 1 feathers opad with ‘white: Bill black; legs dusk 
A. ead uniform in color with rest of upper Dii dark sooty-brown or 
ben Both webs of outer tailfeather tipped with white (except in 
luteola). .All West Indian except luteola, which, however, occurs in 
pee and Trinidad, and generally belongs to the shores of the Caribbean 
Sea. 
1. A distinct and conspicuous external white patch at base of primaries. 
Wing-coverts not margined with paler. 
a. Throat outs but decided dark ering: varying in shade, 
never oes black, however, nor ashy- 
Throat very dark a mte paeiti or + appreciably different 
from blackish - ne 
t u ti l ri PPPE 
e 
anad 
obliquely behind t to the outer nts of the primary, re achi ing 
shaft of ees ayer ry. Yellow of breast Seria pea 
eous. Ru L NEI yellow « as the b - 
maic: AVEOLA. * 
White pateh of 7 wi ng more andrate ach guild: trans- 
verse; not tapering off gr ae and Abk behind; not 
PEE m Bhaft on outer pom: Brom ast t without sped 
of belly. Hab. San NEWTONI. ł 
4 b. Chin and throat ger as toe coat not eo al igre in decided 
m yellow, 
like under parts gene rally 
Lateral tail feather broadly tipped with white on both webs. 
Rump olivaceous-yellow. 
oc eae pot e each primary apa C as in Ne 
toni. Hab. Porto Rico and St. Tho: P 3 
rthia flaveola a Syst. Nat., ed. 10, 1758, 119. 
nis flaveola A. &. E. Newton, Ibis, 1859, 67. "Hab. St. Croix. C. Newtoni 
ETP flaveola, var. E Bryant, Pr. Bost. Soc. N. H., Jan., 1866. 
- Porto Rico 
