CISTOTHORUS. 149 
From a careful examination of the data furnished by the tables 
and indications of localities in the preceding pages, it will be seen 
that a few species, as Turdus mustelinus, Suscescens, swainsont, 
aliciz, and migratorius, Galeoscoptes carolinensis, Mimus polyglot- 
tus? of the Turdide, with Sialia sialis, of the Saxicolide, and Poli- 
optila caerulea of the Sylviide occur in the West Indies as winter 
visitors. The remaining species of these families (except some 
peculiar to the islands), with the whole of the Cinclide, Paride, 
Certhiade, and Troglodytide, are entirely wanting. Even the 
species just named appear to be confined to Cuba—none of them 
occurring, as far as known, in Jamaica or the other islands, and 
probably visiting Cuba only as stragglers from Florida, or en route 
to Mexico and Guatemala via Yucatan. 
Of the Turdide there are several genera peculiar to one or other 
of the West India Islands. Of North American genera, Mimus has 
peculiar species in the Bahamas, Cuba, Jamaica, and St. Domingo, 
and Polioptila in Cuba. ’ 
It will be seen hereafter that these generalizations of distribution 
are widely different from what prevails among the Sylvicolide, a 
much larger proportion of the species being spread in winter over 
many of the West Indies, with several resident species peculiar to 
one or more of the group. 
-+ 'Thryothorus albinucha.—Since the preceding sheets on the 
Troglodytidz were printed, I have had the opportunity of exam- 
ining the type specimen of Dr. Cabot’s Troglodytes albinucha, 
Pr. Bost. N. H. Soe. II, 1847, 258, from Yalahao, Yucatan, April, 
1842. I find it agrees almost exactly in size and proportions with 
Thryothorus petenicus of Mr. Salvin, being only a very little smaller. 
The coloration and markings are precisely similar, the only difference 
being in the tail. The middle (exposed) feathers in petentcus are ashy 
brown, with spotted or broken bars of black, most distinet and con- 
tinuous across the middle. The other feathers are black; the exterior 
webs of the outer two and the ends of outer three marked with quad- 
rate spots of whitish, sometimes tinged with plumbeous. In albinucha 
the upper surface of the tail has a slightly more reddish tinge, and 
the bars are more broken and irregular. The quadrate whitish or 
grayish blotches on the inner webs of lateral tail feathers extend 
nearly to the middle of the feather, instead of being confined to the 
tips. I do not observe any trace of the dusky tips to the feathers of 
breast, nor of the obscure dusky bars on the flanks seen in petenicus. 
These differences are, however, not incompatible with the identity 
1u# October, 1864, 
