128 PROCEEDINGS OF THE ACADEMY OP 



II. A collection of Reptiles, from Belize from Dr. Parsons, contained 



Oinosternum leucostomum, Ptychemys o r n a t a, Dermatemys mavei 



and Chelopus areolatus. 

 Of Ophidians, Leptodira a n n u 1 a t a. 

 Coniophanes bipunctatus Cope, Proc. 1860,248. Coronella bipunctata 



Giintlier, Catal., 36. 

 The other species of this genus known are 

 C. fissidens Hallowell, Giintlier, Catalogue B. M. (Coronella.) 

 C. proterops Cope, Pr. A. N. Sci. 1860, 249. 

 C. p u n c t i g u 1 a r i s m. 1. c. 1860, 248. 

 C. dromiciformis m. Tachymenis dromiciformis Peters.* Monatsber. 



Berlin, 1863, p. 273. 

 C. 1 a t e r i t i u s ni. 1. c. 1861, 524. 

 C. imperial is m. 1. c. 1861, p. 74. Tmniophis imperialism., Gird., U.S. 



Mex. Bound. Surv. Rept., 23, Tab. 19, fig, 1. 



Coluber t r i a s p i s sp. nov. 



Form compressed, as in C. 1 aetu s ; scales all small, smooth, faintly cari- 

 nate on the caudal region, in thirty-three longitudinal rows ; head elongate, 

 with three or two loreals, one preocular and two or three postoculars. Maxil- 

 lary teeth weak, slightly longer in front. Vertex and front plane, muzzle 

 narrow, rounded, rostral not prominent. Nasals elongate, internasals a little 

 broader tlian long, prefrontals long as broad. Preocular not quite reaching 

 frontal ; latter longer than broad, front and sides straight, forming rectangles, 

 posterior angle very open. Temporals three, long, oblique upwards and back- 

 wards from the sixth upper labial, separated from occipital by two small scales. 

 Nine superior labials, all longer than high, fourth and fifth under orbit. Pre- 

 geneials long, postgeneials rudimental. Tail a little less than one-fifth total 

 length. Gastrostega 266 ; anal divided; urostega 118. 



Yellowish gray, with fifty jet black, white margined dorsal spots, which 

 occupy thirteen scales transversely and three and four longitudinally. They 

 are narrower and more approximated posteriorly, and are accompanied by a 

 series of similar quadrate lateral spots alternating with them: light brown 

 irregular spots on the ends of the gastrostega. Below immaculate. A narrow 

 and broad black crossband on the muzzle, latter from orbits ; one on each 

 side from the superciliary shield to the nape, and a median band from middle 

 of frontal to beyond occipitals, enclosing a pale occipital spot. 



This species is said to be common in the Belize, " where it is called Clap and 

 riawyer." It grows to eight or nine feet in length, and is very active in its 

 movements. 



This is an anomalous species of the genus ; its elongate form, loreals, and 

 general physiognomy approximate it to the Dipsadine genus Trimorphodon, 

 of the same region. 



Masticophis margaritiferus. Drymobius m. 



Elaps ornatissimus Jan, Eleuco. 



Klaps diastema Dum., Bibr. 



Bufo sternosignatus Giintlier. Catal. 



The same correspondent sends from the neighboring region of Honduras 

 Niuia collaris ra. Streptopliorus sebce collaris Jan, and 

 Rhegnopst v i s o n i n u s gen. et sp. nov. 



* Professor Peters finds Coniophanes Ilallnwell probably identical with Tachymenis Wiegmann. 

 The distinction-* are well mat keel, in the former one preocular and no scale pores, in the latter 

 two preoculars ami one scale pore. The former genus has been since called (Haphrophis by .Ian, 

 and the Tachymenis hypoconia m. 1. c. 1863 219, is Mesotes obtrmus Jan, Coronellinse, 1863. 



+ Pttyw/jt from the severance of the nasals. 



[May, 



