626 11. LEPTOTYPHLOPIDZ 
Ser. 4, Vol. XI, 1921, p. 52; Netson, Mem. Nat. Acad. Sci., Vol. 
XVI, 1921, pp. 114, IIS. 
Leptotyphlops humilis RutHVEN, Bull. Am. Mus. Nat. Hist., Vol. XXIII, 
1907, p- 573; GRINNELL & Camp, Univ. Cal. Publ. Zool., Vol. 17, 
No. 10, 1917, p. 176; STEPHENS, Trans. San Diego Soc. Nat. Hist., 
Vol. III, No. 4, 1921, p. 63. 
Description—Body long and slender, with short, blunt 
tail bearing a small spine at its tip. Head small, continuous 
with neck, slightly depressed, with prominent, rounded 
snout. Rostral plate strongly recurved on top of snout, and 
continued back on lower surface of head to mouth. A large 
nasal plate bordering lip, divided behind, and sometimes in 
front of, nasal opening. Ocular plate reaching margin of 
lip between two labials. Two large plates, parietal and 
occipital, behind ocular. No supraocular plate. Nasal, 
ocular, parietal and occipital plates separated from corres- 
ponding plates on opposite side of head by single series of 
small, rounded, imbricate scales. Scales on chin smallest. 
Fourteen rows very strongly imbricate scales around middle 
of body; middle ventral series often slightly enlarged. 
Preanal plate single. Caudal scales similar to those on body. 
The entire upper surface, five to seven longitudinal rows 
of scales, is brown, sometimes slightly grayish at the edges 
of the scales. The lower parts are creamy white, rarely 
clouded with gray. 
Length to anus... Of” 98 133° 199° 235° 272. 291 368 
Length of tail... 4 4+ 7 ¥10 9 SS SIT are 
Width of head = 2 2 2 3 4 4 4 
Width at middle of body 2 2 24%, 4 5 5 6 
Distribution —In California, this little snake has been 
found at Fort Yuma, Imperial County; Vallecito at about 
1600 feet, and near Banner on the east slope of the Cuya- 
maca Mountains at about 3000 feet altitude, and near 
Ladrillo Station near Pacific Beach, San Diego County; 
