1891.] Zoology. 743 
York and Massachusetts ; tail slightly longer proportionally, white all 
around for about 25 mm. at tip. Length 225, tail 126, hind foot 
30 mm. (Type q ad.; No. $84, collection of G. S. Miller, Jr., Resti- 
gouche, N. B. ; September roth, 1880 ; E. A. Bangs, collector.) The 
skull closely recibi that of Z. hudsonius, but is slightly larger, with 
brain-case a trifle broader and flatter. 
The other two specimens are males. They agree perfectly with the 
type, except that the tails are longer, with the white tips reduced to 13 
and 11.5 mm. They measure: Length 224, tail 141, hind foot 30.8; 
and length 235, tail 140, hind foot 30.4; and were taken at Resti- 
gouche, September 8th and roth, respectively. 
The three specimens agree in lacking the upper premolar usually 
usually found in Zapus hudsonius ; but as all are old, and have the teeth 
much worn, it is possible that this tooth may have been shed, leaving 
no trace of its former presence. I can find no published account of 
the occasional absence of this premolar in Z. hudsonius; but Mr. F. 
W. True writes me that a single specimen from Pennsylvania in the 
U. S. National Museum shows this peculiarity. 
Apparently the only description of a jumping mouse with white- 
tipped tail is that given by Dawson (Edinb. N. Phil. Journ., III., 1856, 
2), who describes the animal from near Halifax, and uses the name 
Meriones labradorius Rich. for it. Richardson took his name from 
Sabine (Zool. App. Franklin's Journ., 1823, 661), whose specimen 
‘ from Cumberland House’’ was imperfect, having the tail only 2.50 
inches long, thus rendering the name /aévadorius undeterminable. The 
first adequate description given under the name /aéradorius is that of 
Richardson, in the ‘‘ Fauna Boreali-Americana,”’ and this refers strictly 
to Z. hudsonius, or at least to a dark-tailed animal. 
My warmest thanks are due Mr. Bangs for his kindness in permitting 
me to announce this new species, which is his discovery rather than 
my own.—GERRIT S. MILLER, JR., Peterboro, N. Y., June 28th, 1891. 
Descriptions of Three New Species of Mexican Bats.— 
During a recent collecting trip, made for the-Comision Geografica- 
Exploradora, to Las Vegas, Canton of Jalapa, Vera Cruz, I found what 
appears to be a new species of Vesperugo. 
‘Close by the hamlet of Las Vegas is a small, long-since-extinct 
volcano, on the sides of which are found numerous “‘ sink-holes’’ that 
give entrance into long, narrow caves or tunnels, through which for- 
merly flowed the lava after it had ceased to be fluid on the surface, 
Some of these tunnels are as smooth and clean as though but lately 
emptied of their fiery contents, whilst others are strewn with great 
