68 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Contia occipitale nallowell. 



Rluiioitomn occipitale Hall., Proc. Acad. Phila. ; 1854, 95; CMonactis 

 occipitalis Cope, I. c, 605, and Kep, Nat. Mus., 941 ; Contia occipitale 

 Boul., l.c, 11,266. 



Snout prominent; nasal undivided; loreal small ; oculars 1-2; 

 temporals 1-2; upper labials 7; scales in 15 rows; tail about one- 

 fifth of total length; ventrals 147-158; subcaudals 34-44. 



Length about 300 ram. 



Color white or pale yellow, sometimes pinkish; narrow black 

 rings around the body at intervals of about five scales, sometimes 

 interrupted on the ventrals; rest of belly whitish; a Ijlack crescent 

 on the hinder part of parietals with the horns forward. 



Hab. — Arizona. 



Contia mitis B. and G. 



I. c, 110 ; ? Loilia tenuis B. and G., I. c, 116 ; C, mitis and L. tenuis 

 Cope, I. c, 601 ; Contia mitis Boul., I. c, II. 267, and YanDeu., I. c, 

 163. 



Size small; tail very short; oculars 1-1 (2); upper labials 7; 

 temporals 1-2; scales in 15 rows; ventrals 147-186; subcaudals 

 30-52; length 322 mm. (tail 40). Reaches a length of 415 mm. 



Dark brown with a yellowish stripe on the fourth row of scales, 

 and a row of black dots below it ; ventrals yellowish edged with 

 black ; a black streak on each side of head ; chin and throat 

 spotted with black. 



Lodia tenuis B. and G. , was based upon one example from 

 Puget Sound, Oregon, agreeing with G. mills except in having a 

 small additional plate between the prefrontals, and the loreal reach- 

 ing the eye under the preocular. As no further specimen has 

 come to light in fifty years, it seems safe to refer this unique 

 example to the class of anomalies, the head plates being usually 

 variable in these small burrowing forms. 



Hab. — Central California to Washington and Oregon. 



DIADOPHIS B. andG. 



I. c, 112 ; Cope, I. c, 614, and Kep. Nat. Mus., 743 ; Coronella (part) 

 Boul., I. c, II, 188. 



Maxillary teeth smooth, subequal; one loreal; two preociilars; 

 two internasals; two nasals; scales smooth with one pit, in 15-17 

 rows; anal divided; size small; head distinct. 



Hab. — North America; Mexico. 



If due attention be paid to juvenile characters, the North 



