The prefrontals are in lateral contact with the nasals. [Please select]
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It is not _Pituophis catenifer_, as attested to by the presence of only two prefrontals. [Please select]
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The prefrontals are in contact in all of our specimens save one (UMMZ 113446). [Please select]
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These specimens (UMMZ 112566-7, 118591-9, 118601, 121512-3) are like _Crotalus pusillus_ from Cerro Tancítaro in having the prefrontals paired, a black proximal rattle, and the underside of the tail black. [Please select]
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The prefrontals are bordered posteriorly by one scale in two specimens, by two scales in three specimens, and by three scales in the other nine. [Please select]
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