omily TALPIDAE 51 



Tail length more than half of head+body length ; ears not 



hidden in fur 5 



4. Over-all length of animal less than 88 mm. (3V^ in.) ; fur 



gray-brown in color least shrew, Cryptotis parva 



Over-all length of animal more than 88 mm. ; fur blackish 



in color short-tailed shrew, Blarina brevicaiida 



5.* Upper jaw, in lateral view, with 3 unicuspids visible on 



each side, fig. 44f P'gmy shrew, Microsorex hoyi 



Upper jaw, in lateral view, with 4 or more unicuspids visi- 

 ble on each side, fig. 44^ 6 



6.* Third unicuspid smaller than fourth, fig. 44^ 



southeastern shrew, Sorex longirostris 



Third and fourth unicuspids subequal or third larger than 

 fourth, fig. 44^ masked shrew, Sorex cinereus 



Skulls 



1. Zygomatic arches present, fig. 41 ; teeth not tipped with red 



or brown Talpidae (moles) 2 



Zygomatic arches absent; front teeth tipped with red or 

 brown, fig. \Aa-c, e, g Soricidae (shrews) 3 



2. Teeth in upper jaw 20, in lower jaw 16; upper incisors 



slightly recurved, fig. 44/. . eastern mole, Scalopus aquaticus 

 Teeth in upper jaw 22, in lower jaw 22; upper incisors 



projecting forward, fig. 44^ 



star-nosed mole, Condyltira cristata 



3. Teeth in upper jaw 18 least shrew, Cryptotis parva 



Teeth in upper jaw 20 4 



4. Width of skull more than 11 mm. (^ in.) 



short-tailed shrew, Blarina brevicauda 



Width of skull less than 11 mm. 5 



5. Upper jaw, in lateral view, with 3 unicuspids visible on 



each side, fig. 44f P'gmy shrew, Microsorex hoyi 



Upper jaw, in lateral view, with 4 or more unicuspids visi- 

 ble on each side, fig. 44^, g 6 



6. Third unicuspid smaller than fourth, fig. 44^ 



southeastern shrew, Sorex longirostris 



Third and fourth unicuspids subequal or third larger than 

 fourth, fig. 44^ masked shrew, Sorex cinereus 



SCALOPUS AQUATICUS (Linnaeus) 

 Eastern Mole 



Description. — The eastern mole, fig. 45, has a rather thick 

 )ody, plushlike fur, short forelimbs, broadly rounded hands 

 vith outwardly turned palms, pointed snout, short tail, no ex- 

 ernal ears, and no visible eyes, 



*The characters in this couplet are seen best in a cleaned skull, and only with 

 lifficulty in a whole animal. 



UNIVERSITY OF ILLINOIS 

 I IRRARY 



