Bailey North American Species of Sigmodon. 105 



Titusville 17, Sebastian 9, Lake Kissimmee 2, Kissimmee River 5, Mul 

 let Lake 2, Eden 4, Miami 7, Everglade 2. 



Sigmodon hlspidus spadicipygus Bangs. 



Sigmodon hispidus spadicipygus Bangs, Proc. Bost. Soc. Nat. Hist. 

 XXVIII, 192, March, 1898. 



Type locality. Cape Sable, Florida. 



General characters. Like Jiispidus but smaller, loss uniformly brown, 

 and with lighter dentition; pelage soft as in hispidus. 



Color. Upperparts dark brownish gray, becoming warm brown only 

 on rump; belly grayish brown or whitish; feet dull brownish; tail black 

 ish, slightly lighter below. 



Skull. Similar to that of hispidus but smaller with conspicuously 

 lighter dentition. 



Measurements. Type: total length 279; tail 98; hind foot 31-33 [from 

 original description]. Skull (No. 4485, $ ad., Bangs Collection, from 

 Flamingo, Fla.): basal length 30; nasals 12; zygomatic breadth 19.5; 

 mastoid breadth 14.5; alveolar length of upper molar series 6.2. 



Distribution. The extreme southern part of the peninsula of Florida. 



Specimens examined. Total number 8 from three localities: Cape 

 Sable, Flamingo and Planter, Florida. 



Remarks. In external as well as cranial characters this form differs 

 more from littoralis than from true hispidus with which Mr. Bangs sup 

 posed it to intergrade along the west coast of the peninsula of Florida. 



Sigmodon hispidus texianus (Aud. and Bach.). 



Armcola texiana Aud. and Bach. Quad. N. Am. Ill, 229, 1853. 



Type locality. Brazos River, Texas. 



General characters. Slightly smaller and paler than typical hispidus. 



Color. Upperparts grayish brown or dark buffy gray; belly grayish 

 or buffy white; feet clear gray; tail gray with blackish line along the 

 top. Colors darkest in fresh fall pelage, lightest in faded spring pelage. 



Skull. Differing from the skull of hispidus mainly in smaller size, 

 less arched outline, and smaller, more rounded audital bullae. 



Measurements. Average of 4 adults from Richmond, Texas: total 

 length 248; tail 103; hind foot 30. Skull (No. 97,014, $ ad.): basal 

 length 30; nasals 13; zygomatic breadth 21; mastoid breadth 14; alveolar 

 length of upper molar series 6.4. 



Distribution. Approximately the eastern half of Texas, westward to 

 Vernon and San Antonio, and northward to Cairo, Kansas. 



Specimens examined. Total number 77 from the following localities: 



Texas: Richmond 4, Matagorda 20, Velasco 1, Port Lavaca 6, Talley 

 Island 6, Corpus Christi 4, San Antonio 18, Boerne 1, Fisher Co. 1, Ver 

 non 2, Gainesville 1. 



