306 PROCEEDINGS OF THE ACADEMY OP 



length. Scuta 167, 1, 85. Lateral stripe on second and third rows of scales ; 

 vertebral band not visibly black margined. Color above apparently uniform 

 olivaceous until the skin is stretched. 



Eutaenia cyrtopsis Kennicott, Proc. Academy, 1860, 333. 

 Four specimens, Fort Whipple. 



Eutaenia macrostemma Kennicott, I. c. 1860, 331. 



Two specimens, Fort Whipple. 



The following comparative table will assist in the recognition of these and 

 some other scarcely known species of the genus. 



Scales in nineteen rows ; lateral stripe on the second and third 

 rows : 



Form stout. Temporal small, not attaining the reduced last 

 upper labial ; superior labials seven ; nuchal blotches same 

 color as head : one series of numerous brown bars connect- 

 ing the light stripes, none of which are black edged.... scalaris* 



Form slender. Temporal large, margining the last three upper 

 labials, none of which are reduced ; superior labials eight 

 (seven ;) general color brown, large nuchal blotches aud a 

 double series of very small lateral spots'black ; latter form- 

 ing continuous zigzag on stretched skin ; no black margins, cyrtopsis. 



Form slender, tail three and two-fifths in total ; head narrow, 

 elongate, loreal longer than high ; seven superior labials, 

 temporal not extending beyond penultimate ; above uniform, 

 except on stretched skin, where there is a broad border to 

 dorsal vitta and one lateral row of black spots separated by 

 rufous ornata. 



Scales in nineteen rows ; lateral stripe on third and fourth. 



Form stout, head short, rounded, occipital regions convex ; 

 labials V 8, temporal plate small ; gastrostega 138 148 ; 

 tail one- fifth total length. Olive brown, unspotted, dorsal 

 and lateral stripes yellow, black bordered ; lips, chin and 

 a postoral crescent to near occipitals, with occipital spots, 

 golden yellow ; two small black nuchal spots.... (sp. nov.) flavilabris.f 



Scales in nineteen rows ; no longitudinal bands. 

 Olive brown, with four series of small black spots, and a 

 trace of two exterior anteriorly ; eight superior labials, last 

 very small, no black margin on the sixth or posterior mar- 

 gin of eighth, but a strong black band from eye across pos- 

 terior margin of seventh to mouth. Sides of head white, 

 extending upwards as two areas, margining each occipital ; 

 behind each a black nuchal spot separated by a narrow white 

 line from its fellow, and extending over occipital plates and 

 half of frontal ; prefrontals transverse sumiclirasti.J 



Scales in twenty-one rows, lateral stripe on the third and 



fourth. 

 Frontal plate longer than occipital suture ; temporal small, 

 margining only anterior part of penultimate labial ; post- 



* T/iamnophis scalaris Cope, Pr. A. N. Sci., 1S60, 309, from Jalapa, DeOca. Also Orizava, Prof. 

 Sumii hrast, Nop. 3(5. 37. 



I Two specimens Museum Smithsonian, from the Tahle Land or Southern Mountains of Mexi- 

 co, pent by Dr. Chas. Saiturius vi.le Proc. Academy, 1805, 197. One specimen exhibits eight 

 upper labials, the other seven; in the latter, one preucular is divided, and four posterior superior 

 iabialw united. 



X The markings of this species are entirely peculiar: it is also distinguished by the transverse 

 or narrow prefrontals and internasals. Orizava, Mexico, Prof. F. Sumichrast ; No. 45. 



[Oct. 



