In life an adult from Tonalá, Chiapas, had black stripes. The ground-color below the second stripe, and between the third and fourth dark stripes was tan. The area between the second and third dark stripes was reddish-brown, as was the dorsum between the fourth pair of dark stripes, except that the 10th scale-row was paler. Three excellent photographs of this species have been published under the name _Conophis lineatus_ (Ditmars, 1931:pls. 26 and 27). _Remarks._--Smith (1941:121-122) described _C. pulcher plagosus_ from Tonalá, Chiapas, and characterized the subspecies by its having "(1) the ventrals completely unspotted; (2) secondary lines on paravertebral rows not continuous posteriorly; (3) all other lines on body also somewhat spotted in appearance; (4) dusky markings on chin and supralabial border very dim (less distinct than in _p. pulcher_ or any member of the _lineatus_ series)." Although all Chiapan specimens lack ventral spots, specimens from Guatemala have no spots, small spots, or large spots. Even in specimens from Tegucigalpa, Honduras, the southernmost limit of the range, the spotting varies from a few inconspicuous spots to many large spots. Paravertebral rows were continuous posteriorly in all specimens examined by me. Likewise, all other stripes were continuous bands of uniform width posteriorly, having appeared anteriorly as rows of spots or dashes. The amount of brown on the chin and labials has been shown previously not to be geographically significant. The absence of characters of adequate significance to separate populations precludes the naming of subspecies in this species. Mertens (1952a:93, and 1952b:61-62) designated three specimens from El Salvador as _C. pulcher plagosus_. In the latter paper, Mertens, on the basis of a description of a specimen of "_C. lineatus_" from Divisadero, El Salvador, given by Schmidt (1928:200), referred that specimen also to _C. pulcher plagosus_. I have examined this specimen and refer it to _C. lineatus dunni_. Although I have not seen Merten's specimens, on the basis of the excellent descriptions given by Mertens (1952b:61-62), I refer the three Salvadoranean specimens to _C. lineatus dunni_. The presence of paravertebral stripes in combination with the characteristics of the genus distinguish _Conophis pulcher_ from all other snakes in southern México and Central America. The only sympatric species of this genus, _C. lineatus dunni_, differs in that it lacks paravertebral stripes, although it may have a single vertebral stripe. _Conophis lineatus dunni_ has lateral dark stripes that are present on the 3rd and 4th scale-rows, never on the anterior third of the body as in _C. pulcher_. Even in juveniles the third pair of dark stripes includes the lower part of the 9th scale-row in _C. pulcher_, whereas the dorsal most dark stripe of _C. lineatus dunni_ never includes more than the lower part of the 8th scale-row.