434 ZOOLOGY. 
species (Æ. linarius, = fuscescens, rostratus and Holbollii; and Æ. 
exilipes, = Æ. canescens, of which this is the smaller southern 
race) it differs in lacking the red pileum, and in the total absence of 
the dusky gular spot ; besides in many other minor respects. The 
adult male of true Æ. flavirostris has the rump rosy, but has no 
crimson on the crown ; and has the primaries and rectrices conspic- 
uously edged with white. In view of the total differences from Æ. 
linarius and exilipes —in all the numerous stages of plumage— 
and taking into account its close resemblance to the female of Æ. 
flavirostris, it seems reasonable to place this specimen near that 
species; while at the same time, the features in which it does not 
correspond with the latter are sufficiently important to warrant our 
characterizing it as a different race which, perhaps, represents the 
true flavirostris on our Continent; we accordingly name it Aigio- 
thus (flavirostris var.) Brewsterii ; under which name it is noticed 
in Professor Baird’s new work on North American Birds, now W 
press.— Rogert RIDGWAY. 
A Sprxe-norn MuULEDEER.— Prof. Cope, at a meeting of the 
Academy of Natural Sciences, May 21, called attention to the 
anterior curvature of the axis of the horn in the common deet, 
Cariacus Virginianus, and said it was a point of interest to 
determine whether the true axis or beam, was curved forwards 
or not. On comparison with the Cariacus macrotis of the Plains, 
it was found that the true beam was partly erect and was branched 
(as already shown by Baird), while an anterior snag was d 0. 
forwards, marking exactly the curved line of the axis of gored 
Virginianus. The curvature of the latter was then shown ih 
due to the predominant development of this large anterior ee 
and the partial suppression of the true'beam. He then exhi 
a spike, or second year’s horn of the C. Virginianus, and allue in 
to the occasional occurrence of permanent ph 
i i sai 
the Adirondack region of New York. He on that regi 
Lamberton, a gentleman who had spent much time i 
confirmed the statements that had been made as to their simple 
but said that they were rare. He then exhibited a pait penne 
beams, or spikes, of two feet and a half in length, which : pi 2 
taken from a black-tailed deer (C. macrotis), shot "n . 
miles of the Kansas Pacific Railroad, in Kansas. Te í 
dently belonged to an adult animal, and were the first a 
