NATURAL SCIENCES OF PHILADELPHIA. 361 



on the back are absent on the belly. The under surfaces of the humerus and 

 interfemoral membrane are also hairy, but less so than above. The mask-tufts 

 are of a delicate fawn grey, while the shoulder tufts are white. 



Measurements. 



Length from snout to coccyx 2-3 



" of interfemoral membrane 0-5 



" of outer border of ear 0-7 



" of forearm 7 - 



" of first joint of thumb 0-2 



" of second joint of thumb 0-4 



" of third finger 3-3 



" of fifth " 2-3 



" of inferior extremity 1-2 



Expanse of wing membranes 90 



Habitat. Mirador, Mexico. 



Note on the Bartram Oak (Quercus heterophylla.) 

 BY S. B. BUCKLEY. 



The Bartram Oak (Quercus heterophylla Mx.) has long been regarded by 

 most American Botanists as a hybrid. Accompanied by Dr. Procter, Editor of 

 the Journal of Pharmacy, I lately went to Mount Holly, near Burlington, in 

 New Jersey, to see an Oak with leaves of varied forms, many of which corres- 

 pond in shape with the figure of the Bartram Oak in Michaux's Sylva. It is 

 less than one-fourth of a mile from the depot at Mount Holly, in a thicket 

 near several willow oaks (Quercus p h e 1 1 o s), of which it is plainly one. It has 

 all the characteristics of body, limbs and acorns, peculiar to the willow oak. 

 Many of its leaves also have the ordinary form of Quercus p h e 1 1 o s. Michaux, 

 in his description of the Q. heterophylla, says that several young plants 

 of the Bartram Oak have been placed in the public gardens to insure the pre- 

 servation of the species. One of these, which was grown from an acorn of the 

 original Bartram Oak, was planted in the Bartram Garden. Col. Carr, who 

 succeeded Bartram in the ownership and possession of the garden, showed this 

 tree to Mr. Meehan, of Gerrnantown, who had charge of the garden during two 

 years. With Mr. Meehan, a few days since, I visited this tree. It also is a 

 Quercus phellos. It has very few lobed leaves, indeed there is scarcely one 

 in fifty of them lobed. 



In Mr. Durand's herbarium are specimens of Quercus phellos with lobed 

 leaves like the Bartram Oak, which he received from Columbia County in this 

 State, where such forms of the willow oak are said to be quite common along the 

 banks of the Susquehanna. The Bartram Oak is not a hybrid, but a mere 

 form of Quercus phellos, which like most American oaks, varies greatly in 

 the shape of its leaves. 



Since writing the above I have seen a specimen from the original Bartram 

 Oak, which has both lobed and entire leaves, showing beyond question that it 

 is a form of Q. phellos. This specimen is now in the general herbarium of 

 the Academy of Natural Sciences at Philadelphia. 



Description of a new species of North American Grouse. 

 BY GEORGE SUCKLEY, M. D., U. S. A. 



Pedioc^tes Kennicotti, Suckley. (N. S.) 



Kennicott's Sharp-tailed Grouse ; Arctic Prairie Fowl. Tetrao Kennicotti. 

 Suckley, Mss. 



1861.] 24 



