May, 1893.] REPTILES OF THE DEATH VALLEY EXPEDITION. 181 



tion, of which specimens Lave come to hand only Quite recently, is Sce- 

 loporus orcutti* The only specimens seen have come from San Diego 

 County, Southern California, and the only exact locality known is the 

 Milquatay Valley, which Mr. C. E. Orcutt, who collected the specimens, 

 and in whose honor the species is named, informs me "is just bordering 

 the Mexican boundary, 50 miles east of San Diego by wagon road." 

 It probably penetrates some distance south into the northern part of 

 Lower California, in the southern portion of which its place is taken 

 by 8. zosteromusA This species is closely allied to 8. magister. 8. 

 clarMij on the other hand, is more different from the latter than the 

 latter is from 8. zosteromus. 



I have above alluded to Mr. Boulenger having made 8. floridcmus a 

 synonym of his 8. spinosus var. elarJcii. Cope, on the other hand, makes 

 it a synonym, of S. undulatus (Proc. Am. Philos. Soc, xxn, 1885, p. 398), 

 but both are wrong, as an examination of the type specimen clearly 

 proves. The fig. 6 on Plate i from this specimen shows that it has noth- 

 ing to do with 8. elarJcii, or any species of the group to which the latter 

 belongs. On the other hand, the size of the dorsal scales easily distin- 

 guishes it from 8. undulatus. It is in fact the same form which occurs 

 all through southern Texas and which has commonly been called 8. 

 spinosus. It is fairly separable from the true Mexican 8. spinosus by 

 the greater number of femoral pores. The form occurring within the 

 United States will therefore stand as Sceloporus floridcmus, or 8. spino- 

 sus floridanus (notwithstanding the fact that it does not occur in the 

 peninsula of Florida) if the number of femoral pores should be found to 

 intergrade. The most eastern point where this form has been found is 

 Pensacola, Fla. ; hence the name. It is needless to add that 8. thayeri 

 B. & Gr. does not belong here; on the other hand, the specimens so 

 described and figured by Bocourt certainly do. 



*Sceloporus orcutti sp. nov., plate I, figs. Aa-c. 



Diagnosis. — Similar to Sceloporus magister, but dorsal scales smaller, seven in a bead 

 length, very obtusely keeled and the spiny point scarcely protruding beyond tbe 

 rounded outline; no nuchal collar; back with cross-bands of dark and paler brown, 

 the dark bands being broader than the pale ones; whole underside pale grayish 

 blue, without definite patches, the large males with the blue somewhat darker on 

 throat, flanks, and thighs. 



Locality. — Milquatay Valley, San Diego County, Calif. 



Type.—U. S. Nat. Mus., No. 16330; Charles R. Orcutt, coll.; January 5, 1890. 



Although manifestly related to S. magister, this is perhaps the most distinct-look- 

 ing species of the whole group, the comparative smoothness of the back and the very 

 peculiar coloration being quite notable. The under surface is particularly remark- 

 able when compared with the allied species, it being in fact unique among all the 

 Scelopori which I have examined. It is quite probable, however, that the blue in 

 the old males may deepen and darken as the season advances. 



The constancy of the species canbe vouched for, as I have examined ten specimens, 

 eight of which are now before me, and they are all alike. 



t Plate I, fig. 3, shows some of the more essential characters of this species for 

 comparison with the allied forms. 



