BIRDS OF EASTERN MASSACHUSETTS. 
91 
acknowledged, regarding the intensity of color and size, 
that ornithologists will persist in regarding them as char- 
acters of specific value. And more incomprehensible still 
is the fact, that well-reasoning ornithologists cannot see 
the often-repeated and perfectly natural connecting links, 
both in intensity of color and size, between the two ex- 
tremes, and understand the fact of their being connect- 
ing links, but prefer rather to depart from the great and 
(I believe) unvarying laws that the mighty Euler of 
the universe has established for the maintenance of spe- 
cies inseparable since their creation, and call them ‘^hy- 
brids.” 
If in our furor for forming new species we admit such 
intangible characters as these to be of specific value, we 
cannot consistently stop here, but out of this one species 
alone we must (governed by these laws) make at least six ! 
For I have seen as many constant stages of plumage among 
specimens of T. Swainsonii, besides numerous so-called hy- 
brids. But enough has already been written by Mr. J. A. 
Allen in the Memoirs of the Boston Society of Natural 
History,” Vol. I. Part IV., commencing on page 507, upon 
this subject, to convince any one who will examine for 
himself of the invalidity of ‘‘Alicioe^^ as a species.^ Mr. 
Alien has given the subject much thought, and presents it 
in the right light. 
7. Seiurust aurocapillus, Swain. — Golden<rowned 
Thrush^ Oven-Bird.” A very common summer resident, 
found everywhere in the woods. Its curiously covered nest 
is placed on the ground. Arrives from May 2d to 10th; 
leaves about the middle of September. 
* Examine “ ‘ Birds of Springfield,’ Proceedings Essex Institute,” Vol. 
IV. pp. 56-58; also “ American Naturalist,” Vol. II. p. 622. 
t This genus which has long been placed with the Sylvicolidce, I think 
closely allied to the true Thrushes. Its habits as well as its anatomical 
structure, give it a place among the Turdidce. Members of this genus 
might properly bear the name of Terrestrial Thrushes. 
