22 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 



LEPTOTYPHLOPS HUMILIS HUMILIS (Baird and Girard) 



Rena humilis Baibd and Girakd, Catalogue of North American reptiles, 1853, 



p. 143. 

 L.[eptotyphlops] h.lumilis] humilis Klaubeb, Trans. San Diego Soc. Nat. Hist., 



vol. 6, 1931, p. 340 ; vol. 9, 1940, pp. 123-129, map 2, pi. 6. 



Type.—U.S.^M. No. 2101. 



Type locality. — "Valliecitas," Calif. 



Range. — "The coastal and cismontane area of southern California, 

 and northern and central Lower California, from Santa Barbara to 

 San Ignacio. Also the Mojave Desert and eastward of the Sierras, 

 from the Death Valley region, through the southern tip of Nevada, to 

 central and southeastern Arizona ; also Cedros Island." 



LEPTOTYPHLOPS HUMILIS CAHUILAE Klauber 



Leptotyphlops humilis cahuilae Klaubek, Trans. San Diego Soc. Nat. Hist., vol. 6, 

 1931, pp. 339-340; vol. 9, 1940, pp. 134-137.— Taylok, Copeia, 1939, No. 1, p. 1, 

 figs. 5, 6 (head scales). 



Type.—L. M. Klauber (San Diego, Calif.) No. 2637. 



Type locality. — Yaqui Well, San Diego County, Calif. 



Range. — The Colorado and Yuma Deserts of southeastern Cali- 

 fornia and southwestern Arizona, and probably northeastern Baja 

 California and extreme northwestern Sonora ; an isolated population 

 in the Vizcaino Desert of central Baja California is tentatively re- 

 ferred to this race. 



LEPTOTYPHLOPS HUMILIS SEGREGUS Klauber 



Leptotyphlops humilis segregus Klauber, Trans. San Diego Soc. Nat. Hist., vol. 9, 

 1939, pp. 67-68 ; idem, 1940, pp. 140-143, map 2. 



Type.—V.S.'^.M. No. 103670. 



Ty2>e locality. — Chalk Draw, Brewster County, Tex. 



Range. — "Southeastern Arizona, northern Coahuila and the trans- 

 Pecos region of Texas" (definite records are from Sierra de Santa 

 Rosa and Sierra del Carmen, Coahuila; an indefinite record of humilis 

 from Batopilas, Chihuahua., may be referable to this race, to dugesii, 

 or to an undescribed form). 



LEPTOTYPHLOPS HUMILIS SLEVINI Klauber 



Leptotyphlops humilis slevini Kuvubek, Trans. San Diego Soc. Nat. Hist., vol. 6, 

 1931, pp. 338-339; vol. 9, 1940, pp. 132-133, map 2. 



Type.—Csihi. Acad. Sci. No. 53721. 

 Type locality. — ^La Paz, Baja California. 

 Range. — Cape region of Baja California. 



