SIGMODON 145 



Genl. Char. Larger than S. hispidiis; ears larger, tail longer, 

 colors paler. 



Color. Above light yellowish brown, mixed with ashy and lined 

 with black; under parts white. Tail dusky above, whitish below. 



Measurements. Average total length, 320; tail vertebra;, 121. 



il. pnlliihtn. {.Signioiion), Mearns, Proc V. S. Nat. Mus. Wash., 

 1897, p. 504. 



Type locality. Rio Grande, above El Paso, Texas. 



Geogr. Distr. Eastern Desert Tract, Upper Rio Grande, Texas. 



Genl. Char. Smaller than .V. hispidus texensis; ears larger; color 

 paler. 



Color. Above buffy gray mixed with black; under parts white; 

 feet grayish white. Tail dusky brownish above, grayish white 

 beneath. 



Measurements. Total length, 242; tail vertebra, 103; hind foot, 

 30; ear, 14. 



r.—.Temicus. (.Sigmodon), Mearns, Proc. U. S. Nat. Mus. Wash., 



1897, p. 504- 



Type locality. Cienega Well, Colorado River, Sonora. 



Geogr. Distr. Western Desert Tract, Lower Colorado River. 



Genl. Char. Nasals spatulate at extremity; coloring yellowish 

 instead of grayish. 



Color. Yellowish gray, the sides and rump tinged with ochra- 

 ceous. Under surface white. Feet grayish white. Tail inclined to 

 blackish above. 



.Measurements. Total length, 2.S0; tail vertebra', 12S; hind foot, 

 34: ear, 15. 



201. *spadicipygus. {Sigmodon), Bangs, Proc. Bost. Soc. Nat. Hist., 



1898, p. 192. 



Type locality. Cape Sable, Florida. 



Geogr. Distr. From Miami on the east and Tampa Bay on the 

 west, to southern point of Florida. 



Genl. Char. Smaller than S. hispidus; rump more rufous. 



Color. Above mixed brown and black, the brown more apparent 

 on face and sides; rump cinnamon rufous. Under parts brownish 

 white, tinged with cinnamon; tail black above, dusky gray below; 

 feet dusky; ears dusky. 



Measurements. Total length, 263.5; tail vertebrae, 98.7; hind 

 foot, 30.4. 



•Very doulitfuliy separable from 5. h. litloralis. 



