1914.] 



EEITHEODOXTOMYS FULVESCENS GROUP. 



47 



Specimens examined. — Total number, 127, from the following local- 

 ities in Mexico : 



Sinaloa: Sinaloa, 2; Altata, 1; Culiacan, 1; Mazatlan, 4; Rio Mazatlan, 1. 

 Sonora: Alamos, 6.^ 



Jalisco: Ameca, 3; Atemajac, 2; Estancia, 1;^ Etzatlan, 6;=^ Lagos, 1; Las 

 Canoas, 2f Los Masos, 1;^ Mascota, 1; Ocotlan, 2; Plantinar, 2; San Sebas- 

 tian, 8;3 Talpa, 1; Zapotlan, 7. 



Tepic: Tepic, 2. 



Durango: Chacala, 8; Durango, 3. 

 Zacatecas: Berriozabal, 1; Valparaiso, 5. 

 San Luis Potosi: Hacienda La Parada, 3. 

 Queretaro: Jalpan, 2; Tequisquiapam, 2. 

 Michoacan: Acambaro. 2. 

 Morelos: Cuernavaca, 1> 

 Guanajuato: Santa Rosa, 1; Silao, 2, 



Vera Cruz: Carrizal, 4; Catemaco, 1; San Carlos, 2f Santa Maria, 4. 

 Tamaulipas: Alta Mira, 11; Hidalgo, 9; Jaumave, 1; Victoria, 5. 

 NuevoLeon: Cerro de la Silla, 3; Santa Catarina, 3. 



REITHRODONTOMYS FULVESCENS INTERMEDIUS Allen. 

 Rio Graxde Harvest Mouse. 



Ochetodon mexicanus Allen, Bull. Am. Mus. Nat. Hist. Ill, 1891, p. 223 (not Reith- 



rodon mexicanus Sauss.) 

 Reithrodontomys mexicanus intermedium Allen, Bull. Am. Mus. Nat. Hist., VII, 1895, 



p. 136. 



Reithrodontomys laceyi MIqtl, Bull. Am. Mus. Nat. Hist., VIII, 1896, p. 235 (Watson's 



Ranch, 15 miles south of San Antonio, Tex.). 

 Reithrodontomys intermedium Bailey, N. Am. Fauna No. 25, 1905, p. 104. 



Type locality. — Brownsville, Tex. 



Distribution. — Southern Texas and adjacent parts of Mexico from 

 Del Rio to Brownsville; east to Bexar and Bee Counties; north to 

 Wichita Mountains, Okla. 



Characters. — ^Very similar to tenuis but averaging duller and less 

 intensely ochraceous above, and sides paler. Compared with fulves- 

 cens: Upper parts, particularly head and shoulders, deeper ochraceous. 



Color. — Winter pelage (February) : Ground color of upperparts 

 light ochraceous-buff, brightest on sides, strongly mixed with blackish 

 brown on the back; ears hair-brown, usually tinged with ochraceous 

 on inner surface; tail hair-brown above, grayish white beneath; feet 

 white; underparts white, sometimes faintly tinged with buff. Sum- 

 mer (worn) pelage: Decidedly redder on back and sides, some speci- 

 mens approaching dull orange-cinnamon. Young: Colors grayer and 

 less ochraceous. 



1 Approaching fulvescem. 



2 Collection Am. Mus. Nat. Hist. 



* ApproacMQg nelsoni. 



* This specimen seems best referable to this subspecies, although on geographical grounds it should 

 be either toltecus or helwlus. 



° Collection Field Mus. Nat. Hist. 



