340 REPORT OF NATIONAL MUSEUM, 1898. 



Scales of back in about forty series, all well carinated, spinous and denticulate 

 laterally. Scales of rump smaller tbau those of back. Femoral pores sixteen. 

 Above dark green, cervical collar bordered before and behind by greenish 

 yellow, the anterior border interrupted by black. A few spots on the nape 

 and back >S. torquatus. 



Scales of back in thirty -two dorsal series, the middle one very obsoletely carinated 

 and scarcely murocnate or denticulate ; semicircular. Femoral pores eleven. 

 Above greenish yellow, with dusky, transverse bars. Cervical collar broadly 

 margined before and behind by yellowish S. t. poinsettil. 



Scales of back in forty-two series ; dorsal well carinated and mucronate, outlines 

 straight. Femoral pores twelve. Color above dark green ; the cervical collar 

 without light margin and notched behind above. Back with rounded dark 

 spots iS'. t.formosus. 



Scales of back in sixty-four rows ; carination slight, with but little mucronation 

 or denticulation. Femoral pores twelve. Above dark green, nearly black 

 centrally. Nuchal collar broad, margined and banded with yellowish; back 

 with small spots of the same S. ornatus. 



h. Collar inappreciable, not complete above. 

 Scales about equal, abrupt, much smaller than caudal. Dorsal scales in eighty 

 rows, longitudinal ridges above, nearly all converging along the dorsal line. 



Dark green above, with transverse waved lines of dusky above. A rectangular 

 black patch on side of neck, bordered above and behind by light greenish. 

 Sometimes a more distinct collar, interrupted above Blue patches on each 

 side of belly in male, separated narrowly by several rows of scales. Chin 



uniform bluish spriukled with white S. microJepidotus. 



Scales of body about equal, scarcely smaller than caudal. Dorsal scales in fifty 

 rows. The longitudinal ridges on back more parallel. Middle supraoccipi- 

 tals more unequal, less regularly hexagonal. 



Olive gray, with two distinct yellowish lines on each side, the upper separated 

 by about eight or ten rows of scales. Two series of crescentic dark blotches 

 on each side. A narrow, perpendicular, black line at the shoulder, with a 

 white one behind. Male with the blue patches on belly widely separated. 

 Head beneath banded obliquely on each side with bluish S. graciosus. 



D. Cephalic plates wrinkled at the end and sides of head. Supraorbital region with 



one crescentic series of large plates, embracing a short, straight one of small 

 ones in its concavity. These, with an internal and external series of small 

 plates, making four (sometimes five) in all. Two verticals. About forty-four 

 rows of scales from head to tail. Scales behind thigh smaller than above. 

 Dorsal scales from forty to forty-five. No collar. 



Back with undulating dark lines or double series of crescentic spots, but no 

 cervical black collar. A longitudinal black patch on shoulder and a dusky 

 stripe on the sides in the male. 



Scales inside of femur, carinated; of belly smooth. About forty-one rows of 

 dorsal scales. Free part of long hind toe about equal to cephalic plates. 

 Inner orbital series sometimes wanting. 

 Very indistinct dorsal light stripes separated by about ten rows of scales. 

 Back crossed by nearly continuous undulating lines. Sides dusky. Male 

 with whole chin behind black, with two confluent blue spots.. 6'. undidatus. 



Scales pointed, elongated, scarcely mucronate or deuticulate. Femoral scales 

 smooth inside. Dorsal scales in forty-four series. Femoral pores twelve. 

 Free hind toe three-fourths the cephalic plates. 

 Above olive gray, with two narrow yellow lines margined by black (on one row 

 of scales) and twelve rows apart. Back with two series of crescents in 

 contact. Two small spots at the shoulder S. scalaris. 



E. Cephalic plates smooth or rough. Occipital plates laterally and behind, with 



plates larger than the dorsal scales and not belonging to their series. One 

 large series of supraorbitals, with two external and one internal much smaller, 

 making four. Only one single vertical. 



i 



