NATURAL SCIENCES OP PHILADELPHIA. 125 



% 

 posterior portion very small. Internasal longer than broad, elevated, some- 

 times sharply keeled. Lores deeply grooved. Claws of extended hind limb 

 nearly to ear ; femoral pores 9 10. Auricular marginal scales tbin, not so 

 large as those just preceding. Median abdominal scales once, gulars twice 

 or thrice emarginate. Tail rather short. Length from end of muzzle to vent, 

 4 in. 1 1. 



Color above greyish or brighter green, with a complete pea-green bordered 

 black collar, which is narrower on the gular region. Throat and sides of <^ 

 blue, the latter broadly black-bordered behind and medially. A yellow bar 

 across prefontals, one between orbits and one across occiput, all separated by 

 brown or blackish, the posterior green-bordered behind. Younger specimens 

 have the back brown cross banded. Nos. 734, 719. 



Sceloporus chrysostictus, sp. nov. 



Near the S. scalaris, but without auricular marginal scales larger 

 than the temporal, with smaller dorsal scales and different coloration. 

 Lateral and ventral scales nearly equal ; dorsals in forty-five rows from occi- 

 put to rump, obtusely mucronate, not notched. No larger plates behind 

 parietals. Cephalic plates rugose ; three pair supranasals ; internasal small, 

 flat ; frontal nearly equally transversely divided, anterior half longitudinally 

 divided. Interparietal narrowed anteriorly, long as broad ; parietals oblique, 

 longer than broad. Supraorbitals surrounded by marginals, the external 

 separated from them by a row of rhombic scales. Unguis of extended hind 

 limb to near nostril. From end of muzzle to vent, 2 in. 2 lines. 



Brown, with two golden longitudinal lines from above ear to above groin, 

 separated by nine rows of scales. A series of short, indistinct reddish brown 

 cross-bars on each side the dorsum within these lines. Sides darker, with 

 golden spangles ; axilla and scapular region black. Head dark brown ; below 

 pale brown, chin darker. 



Nos. 507 and 201. 



Sphaerodactylus glaucus Cope, Proc. Acad. Nat. Sci, 1865, 192. 



Several specimens. Dr. Berendt has also sent this species from Tabasco, 

 with Rhinophrynus dorsalis. 



Thecadactylus rapicaudus Gray. Platydactylus Theconyx, Dum. & Bibr. 

 One specimen, with several oblique, lateral, dorsal black spots. 



Coleonyx e 1 e g a n s Gray, Dumeril, Arch. d. Mus. viii. 438, Tab. 



No. 483. Prof. Sumichrast has sent this species from Orizaba, (6334,) and 

 Morelet originally procured it in Peten. Another species of the same genus 

 is Stenodactylus variegatus Wiegm., Baird, U. S. Mex. Boundary Survey. 

 Bracliydactylus Peters, Monatsber. Preuss. Acad. 1863, 41, is identical. 



Cnemidophorus s a c k i i Wiegm. 



This species is a true Cnemidophorus, and not an Ameiva, as formerly 

 supposed. 



Typhlops microstomus, sp. nov. 



This is a slender species, stouter posteriorly than anteriorly, with small 

 flattened rounded head, and muzzle obtuse and very promim nt in profile. 

 Labials four: first minute ; second subquadrate, below preocular ; third and 

 fourth elongate vertically, and embracing between them a subocular; fourth 

 highest, in contact with oral fissure by its anterior augle only. Ooular rather 

 smaller than subocular; eye a small black speck on the oculo-prceocular su- 

 ture ; praeocular very large, broader than both nasals, outline almost angulate 

 iu front ; two equal supraoculars larger than ocular. Nasal much narrowed 

 above, nostril at nearly half its elevation, connected with labial suture by a 

 long suture which is convex posteriorly, leaving postnasal narrower than pre- 

 nasal ; and with rostral suture by a short transverse fissure. Median cephalic 

 series not smaller than lateral. Body scales in eighteen longitudinal rows. 



1866.] 



