1894.] NATURAL SCIENCES OF PHILADELPHIA. 201 



as the well- separated frontoparietals, and bounded by five scales 

 between the frontoparietal and the single transverse postparietal. 

 Frontal twice as Avide as long. Eight superior labials to end of long 

 subocular, the second reaching to the middle of the postnasal only. 

 Auricular meatus horizontal, shorter than eye fissure. Extended 

 limbs separated by the length of the anterior foot only. 



Color above light golden-green, with several indistinct longitudinal 

 rows of paler spots as large as a scale, mingled with as many brown 

 spots as large as a scale. Sides paler than back. Lower surfaces 

 blue, paler on chin and tail. 



Total length (end of tail lost), 151mm.; do. to vent, 70 mm.; 

 do. to line of axilla, 16 mm. ; do. of fore limb, 16.5 ram.; do. of hind 

 limb, 22 mm.; of hind foot, 11 mm. 



This species is allied to the C. steindachnerii Cope. The latter has 

 seven superior labials instead of eight, of which the second reaches 

 the loreal, as it does not in C. eijatioclilons; the postnasals are much 

 shorter. The scales of the anterior regions and parietal plates, are 

 smooth, and the color is totally different. The limbs are shorter. 



This handsome species, whose coloration is unique m the genus, 

 was found by Sen. Juan Cooper, on the volcano of Irazu, No. 217. 



OPHIDIA. 



ASINEA. 

 Trimetopon pliolepis sp. uov. 



In the genus Trimetopon Cope, I find that the hemipenis has a 

 simple sulcus spermaticus, and that the apex for a space on each side 

 of the sulcus is feebly calyculate. The rest of the surface is occupied 

 by spines which are in longitudinal series, and are largest opposite 

 the sulcus at the lower part of the hemipenis. The genus is then to 

 be regarded as one of the Colubrina^ allied to Contia. A single 

 species, the T. gracile Gthr., has been described hitherto, which is 

 also from Costa Rica. I only know it from the description and 

 figures of Giinther in the Annals and Magazine of Natural History 

 for 1872, p. 16. 



Char, specif. — Scales in seventeen rows, like the plates of the head 

 with iridescent refulgence and without fossse. Rostral plate not 

 visible from above ; internasals much wider than long; anterior bor- 

 der of frontal slightly convex forwards. Lateral border of frontal 



