MEXICAN HERPETOLOGICAL MISCELLANY—SMITH 369 
One loreal bordering labials, or if two one very small and split from some 
other scale; two posterior supralabials nearly or quite as high as ante- 
penultimate labial at end of supraocular, and at least one of them (pen- 
ULhMEALe)) angular jabovesss2— 222 ee antauges group_- 15 
dovAn entire: postmental ™Scale rows kaos 22 oe Oe ee oe 16 
Only paired scales following mental; scale rows 16 or more_____-______-_- 18 
16. An azygous prefrontal; range unknown (‘‘Mexico’’) -----__-----_- obscurus 
NORA ZV SOUS PPLE LEE OM bells tee eee UE ee oe ee a eee 17 
17. Supranasals small; three pairs of scales between frontal and rostral; Oaxaca 
TEN CUM ET) OY GN Pe pg spe EG ee ee ee eee bocourti 
Supranasals enlarged, simulating internasals, and forming a total of four 
pairs of scales between rostral and frontal; mountains north of Oaxaca 
lity eo SE Sn he ee LO cable BLED ado ee eae Ee el ae ee oe viridiflavus 
18. No azygous prefrontal; Mount Orizaba, Veracruz____-_-___-__-__- antauges 
ANPAZV SOUS MRCRrONUAL == =.2 he 3) ee pe See as ee 19 
19. Supranasals narrow, not at all enlarged; no postrostral; Oaxaca highlands 
PUM BCCI CIO ET CLO ieee Seta ee oe ee een ese ee er eae gadovii 
Supranasals enlarged, simulating internasals; a postrostral (regular?) ; 
Moun trtOnizabas Weracruzt ss sei. Sie Se ee ee ee modestus 
20. A loreal segmented from lower portion of ‘‘posterior canthal,”’ which usually 
is separated from labials; generally two superimposed preoculars; distinct 
dorsal bands; belly and tail mottled with gray and with black flecks; 
central Veracruz, foothills (not at high elevations) __ liocephalus ophiurus 
Seldom a loreal segmented from lower portion of “posterior canthal,’ which 
rarely is not in contact with labials; generally one preocular ; bands present 
or not; belly mottled or with black flecks but not both____--_-__--__-__ 21 
21. Dorsals 46 to 52, interparietal to posterior margin of thighs; dorsal bands 
distinct ; no black marks whatever or ventral surfaces; belly mottled (gray) 
in adults; northern San Luis Potosi through most of Coahuila to south- 
AW OSLETPM GOR AS ae Ruma ee Rete A oR ae rade Re eo ray liocephalus infernalis 
Dorsals 54 to 59; dorsal bands very indistinct in adults; belly not mottled, 
generally uniform, sometimes with black flecks which may form broken 
longitudinal lines; central plateau, southern Puebla to Guanajuato 
liocephalus liocephalus 
4—AN UNNAMED CELESTUS FROM MEXICO, WITH A KEY TO 
MAINLAND SPECIES OF THE GENUS 
Material recently acquired during my tenure of the Walter Rath- 
bone Bacon Traveling Scholarship of the Smithsonian Institution 
has, in conjunction with other specimens in the United States Na- 
tional Museum, thrown considerable light upon the status of the 
Mexican species of Celestus. In the material available and also 
that reported in the literature, only two Mexican forms can be dis- 
tinguished. One of these has not been named, while the other has 
received three names. 
There is another name in the literature, Huprepis microcephalus 
Hallowell,™* which was placed in Diploglossus (includes Celestus) by 
4 Proc. Acad. Nat. Sci. Philadelphiaa, vol. 8, p. 155, 1856 (perhaps published 1857) ; also 
Trans. Amer. Philos. Soc., ser. 2, vol. 11, pp. 79-80, 1860 (reprints perhaps appeared 1857). 
