134 BULLETIN 199, UNITED STATES NATIONAL MUSEUM 



2. One canthal 3 



Two canthals 4 



3. Femoral pores 11-12; dorsal scales 38-44 carinatus (p. 135) 



Femoral pores 3-6; dorsal scales 28-37 squamosus (p. 135) 



4. Femoral pores 3-11; postanals not or slightly enlarged in males. 



siniferus siniferus (p. 134) 

 Femoral pores 12-14; postanals distinctly enlarged in males. 



siniferus cupreus (p. 134) 



SCELOPORUS SINIFERUS SINIFERUS Cope 



Sceloporus siniferus Cope, Proc. Amer. Philos. Soc, vol. 11, 1869, pp. 159-160, 



161.— Smith, Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, pp. 313- 



319 (part), pi. 25. 

 Sceloporus humeralis Bocourt, Ann. Sci. Nat. zool., ser. 5, vol. 17, No. 10, 1873, 



p. 2 (Mus. Hist. Nat. Paris; Oaxaca, here restricted to the city of Tehuante- 



pec). 



r2/i?e.— U.S.N .M. Nos. 30453-30471, co types. 



Type locality. — Pacific side of the Isthmus of Tehuantepec, here 

 restricted to Tehuantepec (city), Oaxaca. 



Range. — Pacific slopes from western Guerrero to extreme western 

 Guatemala, and inland to Morelos. Recorded in Mexico from 

 Guerrero, Morelos, Oaxaca, and Chiapas. 



SCELOPORUS SINIFERUS CUPREUS Bocourt 80 



Sceloporus cupreus BocotJRT, Ann. Sci. Nat., Zool., ser. 5, vol. 19, No. 4, 1873, p. 3; 



Mission scientifique au Mexique . . ., Etudes sur les reptiles, livr. 4, 1874, 



pp. 210-212, pi. 18 bis, fig. 2, 2a-b.— Smith, Occ. Pap. Mus. Zool. Univ. 



Michigan, No. 358, 1937, pp. 6-9; Publ. Field Mus. Nat. Hist., zool. ser., 



vol. 26, 1939, pp. 305-308. 

 Sceloporus cochranae Smith, Proc. Biol. Soc. Washington, vol. 49, 1936, pp. 87- 



89, pi. 2 (Mount Zempoaltepec, Oaxaca; U.S.N. M, No. 47605). 

 Sceloporus siniferus, Smith, Publ. Field Mus. Nat. Hist., zool. ser., vol. 26, 1939, 



p. 317 (part). 



Type. — Mus. Hist. Nat. Paris; Adolphe Boucard collector. 



" It is with some doubt that the name cupreus is applied to the highland form of siniferus. This was 

 discussed in some detail previously (Publ Field Mus. Nat. Hist., zool, ser., vol. 29, 1939, p. 317). Speci- 

 mens then available showed a higher femoral pore count for the types of cupreus and of cochranae (the latter 

 from Mount Zempoaltepec, Oaxaca), for which the name cupreus was used, than for the few specimens 

 referred to siniferus then available from the vicinity of Oaxaca City. However, new material from the 

 latter region (including EHT-HMS 19195-19202, 19479-80) reveals a variation from 38 to 50 (av. 44.2) in 19 

 counts of dorsal scales, and from 6 to 15 (av. 9.4) in 40 counts of femoral pores. 



From these data it is apparent that the highland population oi siniferus is recognizably different from the 

 typical subspecies and deserves a name. Handicapped by lack of adequate material from Mount Zem- 

 poaltepec and its environs, we find it diflBcult to determine whether the population from that area is the same 

 as that from the Oixaca region, since the single specimen available has enlarged postanals and broad dor- 

 solateral light stripes. Typically siniferus (including Oaxaca specimens) lacks enlarged postanals; none 

 has been observed with them well developed. Likewise, distinct and broad dorsolateral stripes do not 

 occur in male siniferus, although they are present in females. None of the other characters previously thought 

 to be peculiar to the Mount Zempoaltepec specimen are actually so, as shown by data on the Oaxaca series. 

 Moreover, there is some slight variation in the size of the basal caudal scales and in the width and distinct- 

 ness of the dorsolateral light stripes in males. In view of this variability in the only two characters defining 

 the Mount Zempoaltepec specimen (cupreus, sensu stricto), we believe it best under the circumstances to 

 extend the concept of this name to include the Oaxaca specimens; it should then, of course, be treated as a 

 subspecies, if the present interpretation of the name is correct. 



