copyright reserved 
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532 
Am/SSOURI 'iOT.'.,.k.' '.RDEN 
George Engelm..;- ;',pers 
THE SCIENTIFIC MONTHLY. 
SUB-ORDER CffIROPTERA. (The Bats.) 
The Ordinary Bats {Family VespertilionidcEl) —Insectivorous bats, with the 
snout not appendaged, or merely with two lateral excrescences, wing membranes 
ample; tail always completely enclosed in the interfemoral membrane or only the 
last joint exserted. 
The Typical {Genus Vesperiillo). —Cheeks without excrescences y ears 
moderate; incisors, two on each side in the upper jaw and three on each side in 
the lower jaw. 
Little Brown Bat {Fesperlillo Subulatus). —Teeth 38; molars six on each 
side in each jaw; ears aud wings thin; face small, fox like; high forehead and 
pointed snout; ears, large, oval, twice the height of the erect tragus; wings, 
naked; interfemoral membrane naked, except at base; face, whiskered; color, 
dull olive brown ; length, three inches; extent, nine inches; tail, one and one- 
half inches. Everywhere abundant in North America. 
Silver Black Bat {Vespertillio Noctivagans). —Teeth 36; molars five on each 
side in upper jaw, six on each side in lower jaw; tragus almost as broad as high, 
scarcely one-third height of ear; femoral membrane entirely though scantily furred, 
fur long and silky, black, usu^lv ’ 
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