246 PROCEEDINGS OP THE ACADEMY OP 



The long anterior and isolated grooved posterior maxillary teeth appear to 

 us to separate this species from Coronella. 



One spec. Algiers. Gard. Plants, (in ex.) 



Two li " Dr. Wilson, (Bp. Coll.) 



Psammophylax Fitz. Type P. rhombeatus. 

 Systema Reptilium 1843, p. 26. Trimerorhimis Smith, Zool. S. Africa, p.? 1849 < 



98. P. rhombeatus Pitz. Coluber rhombeatus Linn. Coronella rhombeata 

 Boie, Schlegel. Coelopeltis rhombeata Wagl. Trimerorhinus rhombeatus Smith. 

 Dipsas rhombeata D. &. B. 



One spec. Cape of Good Hope. Gard. Plants, (in ex.) 



Tarbophis Fleischmann. Type T. v i v ax. 



Dalrnat. Nov. Serp. Genera p. 18, 1831. Trigonophis Eichwald, 1831. Ailu- 

 rophis "Fitz." Bp. 1832. 



99. T. vivax Dum. & Bibr. Coluber vivax Fitz., 1826. Tarbophis fallax 

 Fleisch. 1831. Trigonophis Iberus Eich. 1831. Dipsas fallax Schleg. Essai ii. 

 295. Tachymenis vivax Gthr. 1858. Ailurophis vivax Bp. Fauno Italica. 



One spec. Italy. Dr. Wilson. 



Hypsiglena nobis. Type H. ochrorhynchus. 



Dentition diacranterian ; i. e. a long, smooth, posterior superior maxillary 

 tooth, separated from the anterior by an edentulous space. Pupil elliptic, 

 erect, body cylindrical. Head distinct, broad posteriorly, shortly conic ante- 

 riorly, much depressed. Cephalic shields normal. Two nasals, nostril be- 

 tween ; one loreal ; two pre-and two postoculars. Scales smooth. Gastros- 

 teges not angulated. Anal and subcaudal scutellaj divided. Tail less than 

 one fourth the total length. 



This curious genus has points of resemblance to Sibon Fitz., Hemidipsas 

 Gthr., Tachymenis Wiegm.; while the general appearance is not unlike that of 

 Coronella Laur. A perusal of the above diagnosis, cannot fail to convince the 

 herpetologist that it possesses characters strongly distinguishing it from all, 

 uniting as it does, in its general aspect, peculiarities of certain tropical and 

 northern forms. 



100. H. ochrorhynchus nobis. Muzzle shortly conic ; rostral plate 

 prominent, encroaching a little on the pre-frontals. Nasal plates indistinctly 

 separated, equal, their upper and lower borders parallel. Loreal longer than 

 high. Lower preocular small, bounded anteriorly by the third upper labial. 

 Eight upper labials, fourth and fifth entering the orbit; sixth and seventh very 

 large. Vertical plate twice as long as broad ; lateral borders slightly con- 

 vergent. Superciliaries narrow ; occipitals as long or longer than vertical, 

 rounded posteriorly. Inferior labials eleven, sixth largest. Geneials two pair, 

 the posterior acute. Scales in twenty-one rows. Gastrosteges 168, urosteges 

 48 pair. Total length, 12 in. 4 lines, tail 2 in. 3 lines. 



Coloration. The upper surface light grey, with a series of large brown spots, 

 separated by intervals of one scale wide. These spots are about forty-eight in 

 number, upon the body; they extend transversely from the seventh to the 

 fifteenth rows of scales, and are three or four scales in length. On the poste- 

 rior part of the body they sometimes divide longitudinally, their moieties 

 alternating or becoming confluent into a zig-zag band. 



Alternating with these on each side, is a series of small spots formed by the 

 brown borders of scales of the fifth and sixth rows. Another series of small 

 spots opposite to the dorsal row, is formed by the shading of the adjacent bor- 

 ders of the fourth and fifth rows with the same color. Many of the scales of 



[June, 



