= Myiodioctes Canadensis And. 
= Dendrceca virens Baird. 
= “ Blackburnice Baird. 
= “ Pennsylvanica Baird. 
= “ ccendescens Baird. 
I 38 FAUNAL POSITION. 
are marked as breeding : — 
Sylvicola pardalina Bon. 
“ virens Lath. 
“ Blackburnia Lath. 
“ icterocephala Lath. 
“ Canadensis Lath. 
Vireo soli tar izis Vieill. 
Picns varius L. = Sphyropicus varius Baird. 
A distinct Canadian element in the Fauna of the south Pennsyl- 
vanian Alleghanies is thus shown. 
The facts hereinbefore narrated regarding the animal and vegeta- 
ble life of the Catskill Mountain region are sufficient for a tolerably 
full understanding of the faunal character of this geographical tract. 
Considered in its entirety, the region, though of limited extent, can- 
not be said to pertain exclusively to any minor Faunal Province, — the 
totality of its life cannot be summed up in a single abstract term ex- 
pressive of a distinct zoo-geographical relation. Between the Hudson 
River and the mountainous parts of the region, where we can recog- 
nize the influence of three distinct Faunae, one only can be con- 
sidered to prevail in its integrity at any single point. This is the 
Alleghanian, and extends over all the less elevated country. In the 
lowland along the Hudson it is perceptibly modified by a southern 
element introduced with certain species which extend up from the 
lower part of the valley of that river where the influence of the 
Carolinian Fauna is so strongly impressed, but passing inland this 
Carolinian affinity is gradually lost, the Alleghanian Fauna, true and 
untainted, succeeding, spreading over the greater part of the region 
and passing into and up the valleys in its invasion of the mountain- 
ous sections, but in its turn gradually giving way to a still more 
northern Fauna, — the Canadian; it is not, however, before the high 
mountain elevations are gained that this Fauna has completely suc- 
ceeded and all traces of the Alleghanian, as such, are obliterated. 
But even at the highest altitudes the Canadian Fauna, although 
taintlessly, is not fully represented, for some of the most character- 
