1905.] NEW MEXICAN REPTILES. 247 



green ; limbs with rather indistinct dark bttrs ; throat and belly 

 dark blue ; a narrow whitish median ventral streak. 



Total length 147 millim. Fore limb 32 millim. 



Head 15 ,, Hind limb ... 45 ,, 



Width of head... 11 „ Tail 80 „ 



Body 52 „ 



Two male specimens from a raAane near Mesquititlan, north of 

 Chilpancingo, Guerrero. 



This very remarkable species, which I take the liberty of naming 

 after Mi'S. Gadow, agrees with S. j)y'>~rJiocephcdus Cope, in its 

 distinctly compressed tail, but diffei's from it in having much 

 smaller scales and more numerous femoral pores. No species of 

 Scelojyoi'us was hitherto known to have more than 25 femoral pores 

 on each side. 



Leptodira guillexi. (Plate VII. fig. 2.) 



Rostral twice and a half as broad as deep, scarcely visible fi'om 

 above ; internasals a little longer than broad, little shorter than 

 the prtef rontals ; .frontal once and two-thirds as long as broad, a 

 little longer than its distance from the end of the snout, a little 

 shorter than the paiietals ; loreal as long as deep ; one prteocular, 

 well separated fi-om the frontal ; two postoculars ; a subocular 

 below the praeocular and another below the postoculars ; temporals 

 1 + 2 ; eight upper labials, fourth and fifth entering the eye ; five 

 lower labials in contact with the anterior chin-shields, which are 

 much shorter than the posterior. Scales in 23 ix)ws. Ventrals 

 189; anal divided; subcaudals 71. Above with eleven dark 

 bi-own areas separated by narrow greyish-white bands ; snout, 

 interocular region, and temples brown, back of head and nape 

 bright red with a dark brown median line ; a light, dark-edged 

 streak along the upper lip ; lower parts white, the ventrals with 

 a brown spot on each side ; subcaudals brown, edged with whitish. 



Total length 530 millim. ; tail 110. 



A single female specimen from the Rio Balsas, Guerrero. 



This species which, on the whole, is intermediate between 

 Z. nigrofasciata Gthr. and L, i^ersonata Cope, is named after 

 Seiior Don Manuel Guillen, Governer of the State of Guerrero, in 

 recognition of valuable assistance rendered to Dr. Gadow. 



EXPLANATION OF THE PLATES. 

 Plate VI. 

 Fig. 1. Auolis gaclovii, sp. n., p. 245. 



1 a. „ „ Upper view of head, X 2. 



2. „ liogaster, sp. n., p. 245. 



2«. „ „ Upper view of head, X2j. 



Plate VIL 

 Fig. 1. Sceloporus ffadovite, sp. n., p. 246. Upper and lower views. 

 1 a. „ „ Upper view of head, X 2i. 



16. „ „ Side view of head, x 2?. 



2. Leptodira guilleni, sp. n., p. 247. Upper and side views of head and 

 anterior part of bodj'. 



