ZOOLOGY. - 865 - 
in scanty numbers, unquestionably do remain throughout the sum- 
mer months. As I knew of their presence in June, July and 
August, I presumed they bred there, very naturally (both the pre- 
sumption and the breeding). In the summer of 1871, I had an 
opportunity of examining a number of warbler and other small bird 
skins, and among them were two unmistakable skins of Regulus 
calendula. These skins were marked ‘Laurel (Rhododendron) 
swamps, Monroe county, Penn., July 11, 1871.” 
What indeed is more likely than that these birds, which are so 
abundant during autumn, winter and early spring, should occa- 
Sionally remain as far south as New Jersey, especially when we 
consider that the northern portion of the state, and the adjacent 
counties of Pennsylvania, are all so admirably adapted to their 
wants and likings? Especially is this true of Monroe and Pike 
counties in Pennsylvania, where there are almost impenetrable rho- - 
= dodendron jungles and hemlock swamps. Throughout summer, 
. these wild by-ways are always cool and damp, just as a locality. 
some miles to the south, which has already been described in the 
Naturauist (vol. ii, p. 39) by T. C. Porter, who says of it, here “the 
ice accumulates in immense masses during the winter and lies un- 
disturbed until late in the spring.” It was here that Prof. Porter 
sought northern plants and was rewarded “by the discovery of 
Sedum Rhodiola DC.— an inhabitant of high latitudes in Europe 
and America.” Have we not here a precisely similar instance in 
botany, to that, in ornithology, of the presence of our two king- 
lets, during the summer months?) With our migratory birds the 
geography alone does not decide all their movements — the geology 
too has its influence; and this is notably the case with reference 
_ to the movements of the countless thousands of warblers that 
follow the valley of the Delaware on their northward migration in 
spring ; and also with those semi-arctic species that, visiting us in 
winter, are checked on their return sojourn, as summer approaches, 
by the dense, damp forests of the Delaware valley, where winter 
long seems to linger in the air, just as in April, in the hollows of 
the woods, the unsunned snow is still lingering when the fields 
and open glades are bright with violets, Epigzea and the columbine. 
—Cuarres C. Assort; M.D., Trenton, New Jersey, Feb. 18, 1874. 
Tae Hoyer-ants.—It is but a few years since this animal was 
described by Westmael, under the name‘of Myrmecocystus Mexi- 
