CKOCODILIANS, LIZARDS, AND SNAKES. 1035 



E. c. e1e(/ans has been found so far in northern and central California 

 only. The IJ. e. Uneolata is from the same region and from Oregon and 

 Washington as well. The E. e. vayrans is characteristic of the entire 

 region between the Sierra Xevada on the west and the eastern border 

 of the Great Plains on the east, and belongs to higher parts of the 

 llocky Mountain ranges as well as to the valleys between them. Tlie 

 E. c. hainmondii is characteristic of southern California and southern 

 Arizona and New Mexico. The E. e. marciana belongs to the valley 

 of the Rio Grande and adjacent regions in Texas and Mexico. It is 

 seen from the above that the EnUvnia elegann inhabits all of the Xearc- 

 tic realm excepting the eastern region. 



As regards transitions between the subspecies, they will be men- 

 tioned under their respectiv^e heads. I refer now to the number of the 

 sjjots in each dorsal row which they present. In E. e. vagrans this 

 extends from eighty-four to one hundred and three in six specimens in 

 which I counted them. In E. e. marciana they range from fifty-two to 

 fifty-eight in four specimens, while there are seventy-three in an other- 

 wise typical specimen. We have here a considerable interval between 

 the ranges. This is tilled up by the E. e. couchii, where they run from 

 seventy-four to ninety-one in five specimens. The number of spots is 

 then tolerably constant, but insufficient to enable us to define species. 



I have endeavored to ascertain whether there is any constancy in the 

 number of temporal scales in them. Thus, in the typical form, E. e. 

 defjans, there are three rows of scales bordering the i)ostorbital supe- 

 rior labials above, while in the E. e. Uneolata there are as often four as 

 three. In one of the latter (Cat. No. 10848) there are, however, but 

 three rows. In the E. e. ragrans five specimens have four rows and five 

 have three rows. In the E. e. liammondii three have three rows and one 

 (Cat. No. 8G6) has four. In the specimens of E. e. marciana, seven have 

 three, and three have four. The rows alwaj^s have the formula 1-2-3-4. 



EUT^NIA ELEGANS PLUTONIA Cope. 



EuUvnia ele(ianx phiionia Con;, Proc. II. S. Nat. Mus., XIV, 1832, p. 653. 



Eutania ragrans aiujuxtirostris Yakuow, Wheeler's U. S. Expl. W. lOOth ^Itr., 



Zoology, V, p. r>54, pi. xx, fijis. 2, 2a. 

 Trojndonotus ragraiiH Bovi.ksukh, part, Cat. Brit. Mus., I, 18!)3, p. 202. 



In the tyj)e of this subspecies (Cat. No. 10912) there is a very faint 

 trace of dorsal and lateral bands. Thegular region is lead colored, or a 

 little lighter than the rest of the lower surfaces. The end of the tail 

 is injured, so that its exact length can not be ascertained, but it does 

 not appear to diller from that of tlie other forms. Gastrosteges lG2j 

 temporals 1-2-3. Black of belly uniibrm. 



In the second specimen (Cat. No. 8171) there is a dorsal band on the 

 anterior 2 inches of the length, and traces in light scale borders for about 

 one-third the total length. For the same distance light scale borders 

 similaily indicate the position of the lateral stripe. Similar less distinct 



