BLARINA. 557 



d/ Above cinnamon hair brown, beneath PAGE 



ashy B. tropicalis 559 



e/ Above dark plumbeous, beneath paler 



tinged with brown B. obscura 559 



b. Tail nearly half as long as the head and body. 



a.' Above dark brown, beneath smoky gray. . .B. oreophila 559 



b.' Above sooty black, beneath brownish B. soricina 560 



B. Size medium, total length in mm., or less; 

 hind foot 13 mm. or over. 



a. Total length less than 107 mm., but over 100 



mm. 

 a ' Hind foot 13 mm. 



a." Braincase highly elevated above ros- 

 trum B. mexicana 560 



b." Braincase slightly elevated above ros- 

 trum B.m. goldmani 560 



b/ Hind foot 15 mm. 



a." Unicuspids without inner cusplets. . .B.m. peregrina 560 

 b." Unicuspids with inner cusplets. 



a.'" Above sooty black, paler beneath. .B. m. machetes 561 

 b/" Above grizzled plumbeous, beneath 



washed with ashy brown B. mayensis 561 



b. Total length 107 mm., or over. 



a/ Hind foot over 13 mm., but less than 



1 5 mm B. nelsoni 56 1 



b/ Hind foot 15 mm. 



a." Large upper premolar with antero- 



internal angle B. alticola 561 



b." Large upper premolar without antero- 



internal angle B. fossor 



C. Size very large, total length over 130 mm B. magna 



A. Cryptotis. 



Teeth 30; unicuspids 4, never in two pairs, fourth smallest; basal 

 lobe of middle incisor a rounded cusp; braincase highest anterior to 

 lambdoidal suture; occipital plane arched. 



524. pergracilis (Blarina), Elliot, Publ. Field Columb. Mus., in, 



1903, p. 149. 

 OCOTLAN SLENDER SHREW. 



Type locality. Ocotlan, State of Jalisco, Mexico. 



Genl. Char. Smallest of the genus. Skull: very slender, similar 

 to that of B. b. berlandicri, but with the rostrum much narrower; 

 molars smaller. Color verv different. 



