76 The American Naturalist. [January, 
abandoned copper mines of San Fernando, one league south of the ex- 
mission of the same name which is situated about twenty-five miles 
from the Pacific coast of the peninsula in about latitude 29° 30’. It 
has an approximate altitude of fifteen hundred feet above sea level, 
and is the center of one of the most barren of the Lower California 
deserts.” Such a locality could not be expected to furnish a very ex- 
tensive bat fauna. Hence the collector’s notes on the habits of the 
animals under conditions apparently so unfavorable are of such value 
that they may be quoted entire for each species. 
CH#RONYCTERIS MEXICANA (Tschudi).—Mr. Anthony secured ten 
specimens of this species in the shafts of the abandoned mines. Southern 
Mexico has hitherto been the northern limit of the known range of 
this bat, which now finds a place in the fauna of ‘ North America.’ 
The ten specimens, all but two of which are adults, measure as follows: 
Number, | 
| 
Sex, Slee ae ba 
Total length Tt \@ 118 T5 i 86 65 1? 75 nf 
Tail v bree 98/8 9.6 9 6 7:6| 8.6 8.4 
Free of tail, 8/ 1.8) 1.4 -2 0.8) 1 4 2 
L. of interfemoral membrane from base of tail,.. 18 |16 1 16 |12 |15 (16.4116 |145 
Occiput to tip of nose,... 2 132.4 | 3% 82 |26 |28.6/32 |30 |32 
TODS Wel: balghti gariey-pin aA 5.4 : 5.4| 3.8 4.2| 4 
Nose leaf: width, .8| 4.6) 4.4 4.4 3.4| 3. 8/4 |4 
from meatus, 2 14.8 14.4|14 |14 |1 16 |15 
-4/10 110 | 8 | 9.2110 {10 110 
5 | 5 5 | 6.2 
4 oA} 2 26| 2.8 
6143 J44 |38 4 4 40 )\43 
8.8 |10 8] 8 110 
37.4 |28 l-4186 197.6 
35.6 |41 |29 40 |41 
16.5 |17.4|12.6 16.4 |17 
21.6 |21.4 |15 20.6 20 
11.4 |11 | 8.4/10.4 12 {11.8 
87.6 (39 |27 t l. 187 186 
10.6 12 9.4 -6 11.8 11.4 
13.9 14.6 11 t > |14 jl4 
36.8 137 |28 t > 186 4 
9.6 10.4! 8.8 |10 ) | 9.4)10 
12.7 |13 110 2 2 113 {12.4 
“ This bat I never saw flying about in the evening. One came into 
my cabin one night about 9.30, but with this exception, I never saw 
one outside of the shafts and tunnels of the mines. Here they were 
fairly common and usually found near the mouth of the opening—fre- 
quently where the sun could reach them at some hour of the day. 
When disturbed during the day, they usually took to the open air, and 
either sought shelter in one of the old buildings about the shaft, or 
flew into one of the abandoned shafts near by. They showed a 
marked preference for the light, but if pursued took to the lower levels 
