CROCODILIANS, LIZARD!?, AND SNAKES. 



347 



bounded by a light band from eacli squamosal region. Sides of neck 

 with a broad black collar, bluish black; the collar with a light poste- 

 rior border above ; the dark color extending over the shoulder, the sides 

 of the head, and the throat. A light band above the upper labials and 

 a i)arallel one below the inferior labials. 



A very handsome species, allied to the iS. torquatus, iS. ornatus, etc., 

 resembling in a slight degree iS./ormosus, but is quite distinct, as the 

 following diagnosis will show. 



The distinctive characters of these species are as follows : 



S. jarrovii. — Parietals 2; scales* hi vertebral line from occiput to opposite groin, 39. 

 Dorsal scales all with yellow ciMiters ; two light bands on side of neck, the iijjper 

 from the cje and continuous with the anterior border of the collar, the lower com- 

 mencing at tlie muzzle; nape black. 



N. ornatus — Parietal single; scales to opposite groin, 50; above black, with two 

 or more longitudinal rows of irregular light spots; no bands on side of neck; nape 

 spotted. 



Dedicated to Dr. H. (J. Yarrow, the surgeon and zoologist of the expedition for 

 "Explorations West of the One-hundredth Meridian." 



This handsome species has been found so far only in Arizona. 



Scelopor us jarrovii Cope. 



Cataliigue 

 No. 



8495 

 8494 

 10194 



11863 



21115-7 



15756 



15757-9 



22228-31 



17252 



Nniuber 

 Of speci- 

 mens. 



Locality. 



Arizona 



Camp Apache, Arizona . 

 White. Kiver Canyon, 



Arizona. 

 Camp Kucker, Arii;oua . 

 Fort Hnachuca, Arizona 

 Huachuca Mountaina, 



Arizona. 

 Fort Huachuca, Arizona 



do 



Nogales 



When col- 

 lected. 



July 



1873 

 1873 

 1879 



From whom received. 



H. W. Henshaw . 

 do 



Dr. R. T. Burr . . , 



do. 



Dr. Wilcox, U.S.A. 

 L. Stejneger 



do 



A.K.Fisher. 

 P. L. Jouy ... 



Nature of 

 specimen. 



Alcoholic, 

 do. 

 do. 



do. 

 do. 

 do. 



do. 

 do. 

 do. 



SCELOPORUS TORQUATUS Greene and Peale. 



Sceloporus iorquatun Greene and Peale, Journ. Acad. Nat. Sci., Pliila., VI, 1827; 



1828, p. 231.— Cope, Proc. Amer. Phil. Soc, XXII, 1885, p. 401.— Boulenger 

 (part), Cat. Liz. Brit. Mus., II, 1885, p. 219. — Bocourt, Miss. Sci. au Mex., 

 Pt. 3, 1874, p. 171, pi. XVIII, fig. 9. 

 Sveloporus tonjuatun Wiegmann, Isis, 1828, p. 369; Herpt. Mox., Pt. 1, 1834, p. 49, 



pi. VII, fig. 1. — FrrziNGEK, Syst. Rept., 1843, p. 75. 

 Tropidurus (Sceloporus) torquatuti Wiegmann, Wagler Syst. Amph., 1830, p. 146. 

 Tropidolcpin torquatus Gkay, Synops. in GritTBtli's Anim. Kiugd., IX, 1831, p. 43. — 



DuMERiL and ]5ihron, Erp. (ion., IV, 1837, p. 301.— Gray, Cat. Spec. Liz., 



1845, p. 208.— Aug. Dumeril, Cat. Moth. Coll. Rept., 1851, p. 77. 

 Sceloporus poinsettii Baird and Gikard, Proc. Acad. Nat. Sci. Phila., 1852, p. 126; 



U. S. Mex. Bound. Surv., 1859, p. 5, pi. xxix, figs. 1-3. 



Two external and one complete internal row of small supraorbitals, 

 with one large central row of four or live, the two or three median ones 

 divided transversely into two each. Three median cephalic plates. 

 Four postnasals and four internasals. Free portion of longest toe 



