CROCODILIANS, LIZARDS, AND SNAKES. 659 



EUMECES PACHYURUS Cope. 



Eumeces imchyitrua Copk, Bull. U. S. Nat. Mus., No. 17, 1880, \>\). 19, 39. — Bor- 

 LKXGER, Cat. Liz. Brit. Mus., Ill, 1885, p. 377. 



Tail loug aud thick at the base. No postnasal plate; anterior loreal 

 elevated, reaching the transverse interfrontonasal plate. Postloreal 

 as bigb as or higher than loug; two preocnlars between lourtb and 

 fifth superior labials; one mental; twenty-six rows of scales; tail 

 large, nearly as stout as the body at the base, subtetragonal; legs 

 small, separated by the length of the anterior limb when appressed; 

 the hind leg a little more than one-fourth the length of the head aud 

 body. Above, light brown; below, pale greenish; anteriorly, straw- 

 colored ; a light narrow band from the superciliary border continued 

 along the body and tail, separated from that of the opposite side by 

 six scales, and with a strong black border above. Below it, a deep 

 brown or black band one and two half scales wide, which is bounded 

 below by another light line; this is in turn bordered by a narrow brown 

 line below, which does not extend like the other bands on the tail. 

 The head and lips are pale brown, and the only head bands are poste- 

 rior to the orbits. 



2Ieasnrements. — Length of head aud body, 78 mm. ; to ear from muzzle, 

 13 mm.; of fore limb, 15 mm.; of hind limb, 19 mm. 



This elegant species belongs to the same group as the E. brevilinea- 

 tus, and differs from the HJ. anthracinus and U. tetrafframmus in the 

 same characters. It differs from the E. hrevilineatvs in the higher 

 loreal plates, the much smaller limbs, and totally in the coloration. 

 One specimen only is in my collection; it was procured near Dallas 

 by Mr. Boll. In size, it is above the average in the genus. 



1 find on comparison of this species with specimens of E. septentrion- 

 alls Baird from Neosho Falls, Kansas, in the National Museum, that the 

 differences between the two species are not great, but that they are 

 nevertheless sufiQcieutly distinguished by the following characters : 



E. jxichyurits. E. septentrionaUs. 



Postnasal scute reaching iuterfronto- Postnasal widely separated from iuter- 



uasal. frontonasal. 



No dark dorsal stripes. Two black dorsal stripes. 



Rows of scales, 26. Rows of scales, 28. 



Unfortunately I have temporarily mislaid the only specimen of this 

 very distinct species which 1 have seen, and can not therefore give a 

 figure of it. 



