196 BULLETIN 199, UNITED STATES NATIONAL MUSEUM 



Diploglossus chalybaeus Cope, Proc. Acad. Nat. Sci. Philadelphia, 1866, p. 321 

 (type locality, Orizaba, Mexico, 4,000-6,000 feet; U.S.N.M. No. 6603). 



Type. — Mus. Comp. Zool. No. 2848; R. Montes de Oca collector. 



Type locality. — Jalapa, Veracruz. 



Range. — Atlantic foothills of Veracruz and Oaxaca. Reported 

 from Veracruz: Orizaba, Jalapa, Tequeyutepec, "one to three miles 

 west of La Goya"; Oaxaca: Totontepec, "Tehuantepec," Santa 

 Efigenia. 



Genus ABRONIA Gray 



Ahronia Gray, Ann. Mag. Nat. Hist., ser. 1, vol. 1, 1838, p. 389. — Tihen, Amer. 

 Midi. Nat., vol. 41, 1949, pp. 587-591. 



Genotype. — Gerrhonotus deppii Wiegmann [=Abronia deppii (Wieg- 

 mann).] 



Range. — Hidalgo, south to Guerrero and Chiapas. In Central 

 America, Guatemala. 



Species. — Nine species, 10 forms; 6 species and 7 forms in Mexico. 



KEY TO MEXICAN FORMS OF ABRONIA 



1. Postmental unpaired 2 



Postmental paired 3 



2. Scale rows 30-33; parietal separated from supraoculars or very narrowly in 



contact; dorsal markings usually indistinct, those on neck, if present, com- 

 bining to form a large single mark ochoterenai (p. 197) 



Scale rows 39; parietals broadly in contact with the supraocular; markings on 

 back distinct, those on neck discrete, not forming a large single mark. 



matudai (p. 196) 



3. Suboculars missing or reduced to minute scales; one anterior temporal bordering 



orbit deppii (p. 197) 



Suboculars present, well developed; 2 anterior temporals bordering orbit. _ 4 



4. Area of granular scales on sides of neck very narrow; no granular zone in 



lateral fold oaxacae (p. 197) 



Area of granular scales covering entire sides of neck; a granular zone in lateral 

 fold 5 



5. Prominent light markings along the sides; dorsal osteoderms absent over 



posterior part of body; dorsal scales about 31-34 (average about 33); mini- 

 mum number of scales in a single nuchal transverse row usually 6. 



taeniata taeniata (p. 197) 



No light markings on sides of body; dorsal osteoderms present over the whole 



body 6 



6. Dorsal scale rows 25 to 29; minimum number of scales in a transverse nuchal 



row, 4 or 5 (75 percent) ; chin and lower labials white with occasionally a few 



scattered dark blotches taeniata graminea (p. 198) 



Dorsal scale rows 30-31; minimum number of scales in a transverse nuchal row, 

 6; infralabials darker than chin and as dark as granular area of neck, with 

 indistinct lighter bands fuscolabialis (p. 198) 



ABRONIA MATUDAI (Hartweg and Tihen) 



Gerrhonotus matudae Hartweg and Tihen, Occ. Pap. Mus. Zool. Univ. Michigan, 



No. 497, 1946, pp. 3-5. 

 Abronia matudai, Tihen, Amer. Midi. Nat., vol. 41, 1949, p. 591. 



