544 ZOOLOGY BATEACHIANS AND REPTILES. 



The type of this genus displays a slight tendency to the form of rostral 

 shield seen in Phimothyra, while the lateral head shields remind one of Ctjclo- 

 pMs (Estivus. It is, however, more like Eittrenia in general characters. 



CHILOPOMA RUFIPCJNCTATUM, Cope, gen. et. sp. nov. 

 PLATE XX, FIG. 1. 



Rostral plate turned over on the superior face of the muzzle, and with 

 a truncate posterior border ; the transverse extent three times the length. 

 Internasals a little longer than wide ; the prefrontals decurved laterally. 

 Nasal long and rather narrow ; loreal elongate and with convex superior 

 border. Preocular higher than wide, in contact with frontal. The latter 

 plate elongate and obtuse behind. Parietals elongate, bounding the entire 

 superior postocular behind. Postoculnrs three ; temporals 1-3-3. Eight 

 superior labials, the last very small ; the fourth and fifth bounding the orbit 

 below. Nine inferior labials ; geneials elongate, the pairs subequal. The 

 head is an elongate oval, nan-owed anteriorly, and quite distinct from the 

 neck. The tail is one-fourth the total length. Scales in twenty-one longi- 

 tudinal rows, all strongly keeled, excepting the first and second on each 

 side; all poreless. Gastrosteges 177; urosteges, entire 4, divided 83. 



General color above light-brown, olive-shaded on the head. The ante- 

 rior half of the body is marked with six rows of small, alternating bright 

 ruftms or orange spots, each of which occupies one, and sometimes an 

 adjoining scale. They stand on the first and second, the fifth, and on the 

 eighth rows respectively. On the posterior third of the length, they are 

 wanting, and are indistinct posterior to the middle of the length. The lower 

 surfaces are pale brownish-gray ; the base of each gastrostege with blackish 

 markings. Labial plates light; head without spots. There is an inferior 

 preocular higher than long on one side of this specimen. 



Total length, .257; to rictus oris, .010; to vent, .195. Diameter of 

 eye, .003 ; of interocular space, .0035. 



This species was found by Mr. H. W. Henshaw in Southern Arizona 

 in 1874. 



