CROCODILIANS, LIZARDS, AND SNAKES. 



663 



The black ui)|)er border to the upper lateral stripe is sometimes a 

 dotted line instead of being continuous. 



In a single si)ecimeu (Cut. No. 3123) there is the faintest possible 

 trace of a light dorsal line, with remains of a dusky Literal edging 

 in the form of fine blackish dots. This marking, however, is very 

 obscure. 



The occurrence of six rows of olive-colored scales between the dorsal 

 stripes will not necessarily determine a si)ecimen to be U. tetragrammu.s^ 

 this being more the result of the multiplication of dorsal scales. To 

 ascertain the species reference must then be had to the amount of dusky 

 color on the sides and above the upper stripe, or whether the latter is 

 like the rest of the back, whether the mental plate is single or double, 

 the postnasal with its hinder edge above the middle of the second labial 

 or in line with its edge. 



This species belongs to the Eastern region, being most abundant in 

 the Allegheny district, from Pennsylvania southward. It also occurs 

 in Texas. 



Eiivieccs anthracintis Haird. 



EUMECES PLUVIALIS Cope. 



Enmeces pluvialts Cope, Bull. U. S. Nat. Mus. No. 17, 1880, p. 19.— BoULEXCiER, 



Cat. Liz. Brit. Mus., Ill, 1887, p. 376. 

 Enmeces anthracinus Baird var. Cope, Proc. Amer. Phil. Soc, 1877, p. 63. 



This is a Eumeces of the group of the E. anthracinus. It has there- 

 fore four supraorbital plates and no postnasal. Its loreals are like 

 those of that species smdE.pachyu- 

 rus, of a rather elevated form, the 

 prenasal reaching the transverse in- 

 terfrontonasal. The two preoculars 

 are wedged between the fourth and 

 fifth superior labials, of which the 

 fifth is elongate and beneath the 

 orbit. The scales are in twenty-six 

 rows and the limbs well developed; 

 when laid along the side they over- 

 lap, the fore claws reaching the 

 end of the second toe. Mental un- 

 undivided. Color above, blackish 

 olive; below, malachite green. Two narrow green lateral bands sepa- 

 rated from each other by a black band two and a half scales wide, the 



Fig. 136. 

 EUMECKS PLCVIALIS COPE. 



Alabama. 



(-'olleotion of E.D.Cope. 



