204 COLUBRID^. 



visible from above ; iuternasals broader than long, shorter than the 

 priefrontals ; frontal hardly once and a half as long as broad, a 

 little longer than its distance from the end of the snout, slightly- 

 shorter than the parietals ; loreal trapezoid, as long as deep ; 

 one priE- and two or three postociilars ; temporals 1 + 2; seven 

 upper labials, third and fourth entering the eye ; four lower labials 

 in contact with the anterior chin-shields, which are shorter than 

 the posterior. Scales in 19 rows, very strongly keeled, outer row 

 perfectly smooth, second row feebly keeled. Ventrals 141-158 ; anal 

 entire ; subcaudals 46-5G. Brown above, scales of the vertebral 

 series yellow ; a rather ill-definecl light lateral streak ; regular dark 

 brown cross bars between the light stripes ; head with dark brown 

 symmetrical markings ; a yellowish streak from the parietals to 

 the angle of the mouth ; upper lip yellow, the shields edged with 

 black ; greyish olive interiorly, ventrals blackish at the base. 



Total length 370 millim. ; tail 65. 



Me?aco. 



a. 5 (V. 141 ; 0. 46). Citv of Mexico. Mr. Doorman [C.]. 



b. S (V. 158 ;-C. 56). S. Mexico. F. D. Godman, Esq. 



[P.]. 



5. Tropidonotus scalaris. 



Thamnopbis scalaris, Cope, Proc. Ac. Philad. 1860, p. 369. 

 Eutaenia scalaris, Cope, Proc. Ac. Philad. 1866, p. 306. 



Head narrow, scarcely distinct from neck; eye rather large. 

 Rostral broader than deep, visible from above ; iuternasals broader 

 than long, shorter than the pra^frontals ; frontal twice to twice and 

 one fourth as long as broad, much longer than its distance from 

 the end of the snout, slightly shorter than the parietals : loreal as 

 long as deep or a little deeper than long ; one pra3- and two or 

 three postoculars ; temporals 1 + 2 ; seven upper labiah, third and 

 fourth entering the eye ; four lower labials in contact with the 

 anterior chin-shields, which are shorter than the posterior. Scales 

 in 19 rows, strongly keeled, outer row smooth or faintly keeled. 

 Ventrals 130-145 ; anal entire ; subcaudals 52-75. Brown above, 

 with a yellow or orange vertebral line, and a light lateral streak 

 on the second or second and third rows of scales ; blackish-brown 

 cross bars disposed regularly between the light stripes ; greyish 

 olive or plumbeous grey interiorly. 



Total length 550 millim. ; tail 125. 



Mexico. 



a. S (V. 130 ; C. 75). Oaxaca. Mr. Hoege [C.]. 



b-d, e. <S (V. 141, 140 ; La Cumhre de los Arras- Dr. A. C. Buller 



C. 63, 71), hgr. $ (V. trados, Talpa Mascota, [C.]. 



143 ; C. 57), & yg. Jalisco. 



(V. 139; C. 52). 



f-h. J (V. 139, 140; C. Colonia Brizuela, Hda. El Dr. A. C. Buller 



65, 65) & 9 (V. 145 ; Rosario, Autlan, Jalisco. [C.]. 



C. 61). 



