SIGMODON. 
Fic. 38. SIGMODON H. BORUCZ. 
No. 10050 Am. Mus. Nat. Hist. Coll. Twice nat. size. 
UpPER TOOTH ROW. LOWER TOOTH ROW 
Enlarged 7 times, Enlarged 7 times. 
. spemeathiochraceous.: .... 4. \s.es ok S. h. furvus 
e.”” Above mixed yellowish and _ black, 
MOucINCRmIIE TINGE. Se Pde eeu ..5.h. toltecus 
®.” Above dark dull brown...... .....9. kh. microdon 
Pre NDAmCOtay OEOWIL s.. apes el od OE a es S. h. batleyt 
b. Size large; hind foot 32 mm. or more. 
a.’ Under parts white. 
a.’ Above pale cinnamon brown......S. h. mascotensis 
bo 
to 
