Cope.] »^0 [March 18, 



47. Tachymenis strigatus Gthr. Tomodon strigatus Giintlier; TacJiy- 



menis hypotonia Cope, teste Boulenger. 



48. OXYRRHOPUS TRIGEMINUS D. & B. 



49. OxYRRHOPUS RHOMBIFER D. & B. 



50. OxTRRHOPUs PETALARius Linn. 



51. Leptognathus turgida Cope ; var. in which the top of the head is 



uniform blackish. 



52. Spilotp.s coRAis Linn. 



53. Herpetodryas carinatus L. Abundant. 



54. Drymobius pantherinus Merrem. 



55. DiRRHOX LATIVITTATUS, sp. nOV. 



The generic name Dirrhox is proposed as a substitute for Callirhinus 

 Girard, a name used by Cuvier for a genus of seals. The type is Dirrhox 

 patagoniensis Girard, which is described in the report of the U. S. Explor- 

 ing Expedition under Commodore Wilkes (1858, p. 139). It is a terres- 

 trial form of Philodryas with two loreal plates one above the other. The 

 name was first proposed in my catalogue of the Batrachia and Reptilia of 

 Central America and Mexico, Bulletin U. S. Nat. Museum, No. 32, 1887, 

 Index. At the same time (1. c.) I propose the generic name Atomophis 

 for the Philodryas trilineatus of Burmeister (Dryophylax bur meisteri Jan.), 

 in which the loreal plate is wanting. 



The Dirrhox lativittatus is a handsome species of moderately slender 

 proportions, and with the head little distinct from the body. The scales 

 are in nineteen longitudinal series, and each has a single apical pit. Muz- 

 zle rather narrow, rounded and not truncate, the apex of the rostral plate 

 appearing on a view from above. The internasals are as wide as long, 

 and the prefrontals a little longer than wide. The frontal has concave 

 lateral borders, and is about as wide as the superciliaries, and as long as 

 the occipitals. The nasals are subequal, and the loreals are placed the one 

 directly above the other. The inferior is parallelogrammic and horizontal, 

 while the superior is shorter and a little higher behind than before. The 

 oculars are 1-2. The preocular is much wider above than below, and 

 reaches the frontal. The superior postocular is larger than the inferior. 

 The temporals are 1-2-3. The superior labials are eight in number, the 

 fourth and fifth forming the inferior boundary of the orbit. Inferior labials 

 eleven, the sixth largest, and in contact with the postgeneials, which latter 

 are a little longer than the pregeneials. Gastrosteges 184 ; anal divided ; 

 urosteges 82. 



The ground color above is a pale brown, which changes to oliva- 

 ceous on the head. A narrow black line passes from the eye along 

 the superior edges of the posterior labial plates, and immediately behind 

 them widens out into a brown band, which soon occupies three and two 

 half rows of scales, beginning with the first row. This extends to the 

 vent where it covers two and two half rows, and still narrower to 

 the end of the tail. A brown dorsal band commences in irregular spot- 

 tings, a lenglh of the head behind Ihe same, and soon becomes solid. 



