NATURAL SCIENCES OF PHILADELPHIA. 81 



This serpent at first sight resembles the preceding species, but is more truly 

 allied to that that follows. 



Lygophis d i 1 e p i s . 



Form slender. Head elongate, distinct, rather obtuse. Scales not abbrevi- 

 ated, in nineteen longitudinal series. Rostral plate elevated, a little recurved 

 posteriorly. Prefrontals well developed, their common suture longer than 

 that of the postfrontals. The latter are rather small. Vertical twice the 

 length of its anterior suture, lateral borders a little concave. Occipitals mode- 

 rate, rounded posteriorly ; one large, four medium or small temporals, the 

 anterior narrow, in contact with both postoculars and two labials. Prenasal 

 larger than postnasal, loreal nearly rectangular. Inferior preoculars higher 

 than long, lower than loreal ; superior nearly reaching vertical. Eight supe- 

 rior labials, posterior labial suture of the penultimate as long as the anterior. 

 Inferior labials ten. Total length 25 in. 6 lin. ; of tail 4 in. 10 lin. 



A deep brown band extends from the muzzle, occupying nearly the whole 

 upper surface of the head throughout the body, where it is black bordered, 

 and occupies one and two halves rows of scales to the end of the tail. A 

 darker band extends from the eye, throughout the total length, occupying the 

 fifth row and the halves of the adjacent rows above and below. Belly, sides 

 and labials yellowish ; space between the bands pale brown. 



Hab. Paraguay. Mus. Smithsonian, Washington, (No. 5861,) Capt. Page's 

 Expedition. 



This species bears much resemblance to the L. lineatus; it may be dis- 

 tinguished by the broader head, stouter body and shorter tail ; by the greater 

 width of the lateral and head bands ; by the two preoculars, etc. 



Colorhogia redimita. 



Char. Gen. Dentition diacranterian. Head moderately distinct, obtuse. 

 Pupil round. Head shields normal except in the coalescence- of the two post- 

 frontals. One preocular, one loreal, one nasal. Rostral plate small, obtuse. 

 Dorsal scales smooth, poreless. Anal plate divided. Tail elongate. 



Char. Specif. Size small, head little distinct, short, obtuse. Scales short 

 obtuse, in seventeen longitudinal rows. Rostral plate low, rounded above. 

 Prefontals small, transverse. Postfrontal large. Anterior border of vertical 

 plate equal to the lateral, which are straight, convergent ; posterior angle 

 acute. Occipitals elongate, obtuse posteriorly, bounded by three large and 

 two small temporals, the anterior large, in contact with the fifth and sixth 

 superior labials and the inferior postocular. Of the latter plates there are 

 two. One preocular curtailed above by the superciliary, which forms part of 

 the anterior border of the orbit. Loreal rectangular, longer than high. Nasal 

 nearly rectangular, the nostril near the superior suture. Superior labials 

 seven, third and fourth entering the orbit. Inferior labials nine ; pregeneials 

 longer than postgeneials. Total length 7 in. 9 lin. ; tail 2 in. 9 lin. 



General color brownish grey, lighter beneath. The median portions of the 

 dorsal scales are punctulated with brown ; a narrow line of the same color 

 occupies the middle of the fourth row of scales to the end of the tail. The 

 vertebral series is occupied by a similar narrow line for the same extent. A 

 dark brown band passes through the eye and is continuous with the lateral 

 line. The entire crown is occupied by a large subsagittiform liver-brown spot, 

 whose outline is parallel with the lateral brown bands. Between these 

 is enclosed a light frontal and temporal band (redirniculum.) Posteriorly it is 

 joined by the median dorsal band. Two light occipital spots as in Tropido- 

 notus sp. Labial plates and chin punctulated with deep brown. Belly im- 

 maculate. 



Hab. Eastern Cuba. Mus. Smithsonian, (No. 5747,) from Mr. Charles 

 Wright. 



This little serpent is allied to Dromicus and Contia, but is readily distin- 



1862.] 6 



