488 ME. G. A. BOtTLENtiEB ON THE [May 18, 



of Louisiana. It has since been recorded from Montana, Nebraska, 

 Utah, Nevada, Arizona, and New Mexico. In addition to the 

 three specimens from Dakota, tabulated above, the British Museum 

 possesses one from Putla, Mexico. 



8. SCELOPOEFS SEREIFEE. 



Scelojjorus . serrifer, Cope, Proc. Ac. Philad. 1866, p. 124, and 

 Proc. Am. Philos. Soc. xxii. 1885, p. 395. 



The following is the original description of the species :■ — " A 

 stout species, near the S. spinosus, but difFering in its fewer and 

 larger scales, with more serrate margins, and in its coloration. It 

 belongs therefore to the section with large lateral scales and only 

 one row of large supraorbitals. In this species the latter are 

 bounded by a complete series of inner and outer marginals. Scales 

 from nape to rump in 23 cross series, each with a long mucro, 

 and two and three lesser ones on each side of it. Interparietal 

 broader than long; frontal narrow, only transversely divided, 

 posterior portion very small. Internasal longer than broad, 

 elevated, sometimes sharply keeled. Lores deeply grooved. Claws 

 of extended hind limb nearly to ear ; femoral pores 9-10. Auri- 

 cular marginal scales thin, not so large as those just preceding. 

 Median abdominal scales once, gulars twice or thrice emarginate. 

 Tail rather short. Length of end of muzzle to vent, 4 in. 1 1. 

 Colour above greyish or brighter green, with a complete pea-green 

 bordered black collar, which is narrower on the gular region. 

 Throat and sides of male blue, the latter broadly black-bordered 

 behind and medially. A j^ellow bar across prsefrontals, one 

 between orbits and one across occiput, all separated by brown or 

 blackish, the posterior green-bordered behind. Younger specimens 

 have the back brown, cross-banded." Yucatan. 



To this description Cope has added a few notes in 1885 : — 



" Of four adult specimens, three have the collar interrupted, 

 and one has it continuous over the nape. In three young speci- 

 mens the collar is uninterrupted. In none of the adults are there 

 more than ten femoral pores." 



A single female specimen, from Mexico, which I have referred 

 to S. serrifer, perhaps belongs to a distinct species, as suspected 

 by Griinther. It has 35 scales between the interparietal shield and 

 the base of the tail, 10 corresponding to the length of the shielded 

 part of the head. Tibia as long as the shielded part of the head ; 

 the distance between the base of the fifth toe and the extremity of 

 the fourth equals the distance between the nostril and the arm. 

 10-11 femoral pores. Olive above, brown-spotted ; a dark brown 

 nuchal collar, interrupted in the middle. 



From snout to vent 72 millim. 



9. SCELOPOEUS OECUTTI. 



Sceloporus orcutti^ Stejneger, N. Amer. Faun. no. 7, 1893, p. 181, 

 pi. i. fig. 4. 



Head-shields smooth ; frontal transversely divided, in contact 



