NATURAL SCIENCES OP PHILADELPHIA. 349 



Phyllosira flavescens Cope. 



Char. gen. Subfam. Atlwetullime. Dentition syncranterian. Two nasals, 

 one loreal and preocular.. Body cylindrical. Scales in subtransverse series, 

 with two larger median dorsal rows, which, alone are keeled. Postabdominal scutel- 

 lum entire. Pupil round. 



Char, specif. Scales in ten longitudinal series. Eight superior labials, eye 

 over fourth and fifth; two postoculars. Two large, one small temporal. Late- 

 ral borders of vertical slightly concave, not touching preocular ; prefontals 

 as long as postfrontals ; rostral as high as broad. Front slightly convex. 

 Length of head 9 lines ; of body 17 inches 5 lines ; tail mutilated. Color yel- 

 lowish brown anteriorly, posteriorly brownish yellow. Below yellow. No. 5813. 



This genus is nearly allied to Ahsetulla. The species seems to bear some 

 resemblance to Schlegel's Dendrophis a u r a t u s. 



Thrasops marginatus Cope. 



Eight superior labials, eye over the fourth and fifth. Three large tempo- 

 rals. Preocular sometimes in contact with vertical. Two postoculars ; loreal 

 none ; postnasal no longer than prenasal ; its posterior border vertical, as long 

 as its frontal. Scales in fifteen longitudinal rows, all keeled but the inferior ; 

 tail scales smooth. Angulation of abdominal shields weak. Length of rictus 

 1 inch ; of head and body 33 inches 9 lines ; of tail 16 inches 9 lines. 



General color greenish straw color ; the scales with their margins and keels 

 brown. Median dorsal region bluish green; head dark green, the plates 

 margined with black ; labials pale, not margined. No. 4667. 



This species resembles the occidentalisin the scutellation of the head ; 

 that species differs in its uniform bright green color, and fewer keeled scales. 

 The ahaetulla exhibits two longitudinal blue bands, more numerous 

 superior labials, and a more elongate nasal shield. 



Pseudoe'aps pantherinus Fitz., Dum. Bibr., vii. p. 181. No. 5796. 



(Braz.) 

 Erythrolamprus venustissimus Boie, Dum. Bibr., vii. p. 851. No. 



5862. (Braz.) 

 Phalotris tricolor Cope, Pr. A. N. S. Philada., 1861, p. 524, Dum. Bibr., vii. 



p. 837. No. 5816. 



Epiciates crass us Cope. 



Scales in thirty-nine longitudinal rows. Head short, wedge shaped, muzzle 

 rather narrow ; superior labials twelve, sixth and seventh entering orbit. 

 Head plates as in E. c e n c h r i a. General form thick and short. Tail less 

 than one- eighth of total length ; the latter 36 inches 6 lines ; length of head 1 

 inch 5 lines. 



General color leather brown ; three rows of darker spots on each side, the 

 inferior broken up, the superior bordered with whitish above on the thirteenth 

 row of scales. These borders uniting form a band on the anterior third of the 

 body, immediately above a brown band formed by the confluent spots. About 

 thirty-four distinct pale oval spots on each side the vertebral line, sometimes 

 confluent with those of the opposite side; they form a longitudinal band on 

 the nape. A median and two temporal brown bands on the head. Cadosa, 

 Parana River. (Sm. No. 5409.) 



The number of species of Epicrates without subocular plates is perhaps a 

 matter of uncertainty. The specimens of E. c e n c h r i a (as figured by Prince 

 Neuwied), which I have seen, have the seventh and eighth superior labials 

 entering the orbital rim. So has the E. maurus, according to Dr. Gray, 

 who states that it is further characterized by a very elongate ninth. There 

 is a common brown species, of which I have seen none but adult specimens, 

 procured in Trinidad, Venezuela, and Panama, in which the eye rests upon 

 the sixth and seventh superior labials ; occasional traces of lateral and dorsal 



1862.] 



