CROCODILIANS, LIZARDS, AND SNAKES. 1085 



above and beliind it is miieli larger and elongated; tbe upper one, 

 somewhat smaller than tbe last, is in contact witb tbe occipitals. On 

 one side in tbis specimen tbe large middle temporal is divided into two 

 portions, tbe anterior being the smaller. Two scales in second row on 

 both sides. 



Twenty-one dorsal rows of scales, the outer one but little larger tlian 

 the second, the former smooth anteriorly, faintly carinated toward tbe 

 tail; carime on tbe remaining rows increasing toward the dorsal line. 



A golden yellow stripe occupies tbe median row of scales from nape 

 to tip of tail, widening slightly on tbe edges of tbe contiguous rows at 

 the anterior end; a lateral stripe of same color very indistinct anteriorly, 

 where it is mostly confined to the third row, but better defined on tbe 

 posterior third of tbe body, where it invades the upper half of the sec- 

 ond. Color above the laterals brownish olive witb two series of alter- 

 nating dark spots (sixty-six pairs in tbis specimen from head to anus), 

 tbe lower series on the fourth, fifth, and sixth rows, the upper on tbe 

 seventh, eighth, and ninth; below tbe lateral lines, the first and lower 

 half of tbe second rows (anteriorly, occasionally to tbe lower half of 

 the third) with tbe ends of the abdominal scutellte, are lustrous pitch- 

 black. Tbe upper surface of the head in front of tbe occipitals is 

 greenish olive; behind that, to tbe neck and tbe sides of tbe head, 

 including the seventh and eighth superior labials, blackish brown, 

 slightly maculated witb dull chestnut just behind the occipitals, the 

 dorsal yellow line being slightly indicated on tbe dark patch. Beneath 

 white, with a creamy tinge anteriorly, becoming jiale greenish on the 

 subcaudals. The labials are margined with blackish brown; a post- 

 oral cream-colored crescent with the concave side forward; a similar 

 band passing down on tbe postorbitals widens on the sixth ui)per labial 

 and runs into the throat color, and a third light band is indicated on 

 the anteorbital, becoming lost on tbe fourth upper labial. Iris bright 

 copper color. Scuta, 15G-1-G3. 



Measurements. ^Total length, 510 mm.; length of tail, 110 mm. 



Tbe general affinity of the species is to the i/. eleyans jnaniana, since 

 when the epidermis is removed tbe spots have much the same character. 

 It is especially characterized by tbe large number of temi)()ral scales 

 of tbe first row, which are more numerous than in any other species of 

 the genus. The contact of tbe preocular and frontal plates is also 

 uncommon. The broad black lateral band is characteristic. 



Tbe only specimen known was taken near Tucson, Arizona, and was 

 sent to tbe zoological garden of Philadelphia by Mr. Herbert Brown. 

 During life it was of an aggressive disposition, like several other spe- 

 cies of tbe genus. It is now in tbe museum of the Philadelphia Acad- 

 emy of Natural Sciences. 



