162 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



PlicuB 12 ; inner toe and joint distinct, otiier toes well developed, cylindric; 

 width bead 5 to 6 times, and length head to axilla, 2.5 to 3 times, to groin ; 

 tail generally more elongate ; black ; sides, tail, and often back, gray 



varied ; larger *'. leprosus. 



PlicfB 11 ; inner toe not distinct ; other toes very short, margined ; width of 

 head 4| to axilla, 1.3 to groin ; tail short; black, unspotted; medium. 



S. ceplialicits. 

 II. Vomerine teeth not continued posteriorly to the parasphenoid patches, nor exte- 

 riorly to bej^oud the nares. 

 a. Tail round ; costal grooves 11-12 ; inner toes rudimental. 



Plicfe 11 (without inguinal) ; width of head 4.5; length to axilla 2f times in 

 length to groin ; tail rather short ; toes very short ; upper lip more or less 



truncate and augulato - S. chirophrus. 



aa. Tail subround; costal grooves 21 ; inner toes minute. 



Width of head near one-seventh, length to axilla .33 of length to groin ; limbs 

 short ; tail thick at base; brown, with a dark lateral band on each side; 



small S. tnultiplicatus. 



aaa. Tail compressed; costal grooves 13-14 ; inner toes distinct. 



PlicjB l^sually 14; width of head less than one-sixth to groin ; head to axilla 

 well over .33 of the same ; body longer, tail not keeled above proximaliy, 

 comparatively short ; vomerine series turned obliquely backwards; yel- 

 low, with two latero-dorsal black bands ; tail dark laterally ; belly yel- 

 low, immaculate ; small S. bilincatus. 



Plicaj, 13 ; width of head equal one-sixth length to groiu ; muzzle to axilla 

 more than one-third the same ; tail long-keeled above ; yellow, sides 

 many black-spotted, a median dorsal series of spots; tail yellow, black- 

 barred; belly immaculate ; larger S. longicaudus. 



PlicPB 13 ; width of head greater than one-sixth length to groiu ; from 

 muzzle to axilla considerably more than .33 length to groin ; tail long- 

 keeled above ; yellow, with three black bauds ; tail black, yellow-barred ; 



belly mottled; larger S. gutiMinealu8. 



III. Vomerine series of teeth continuous posteriorly with the parasphenoid brushes, 

 and originating behind nares. 



Costal plicaj 15-1 C; head wide, not more than seven times to groiu, not 

 more than twice to axilla ; no canthus rostralis ; tail rounded at base, 

 not finned ; large ; vermilion red, black or brown spotted S. ruber. 



SPELERPES MULTIPLICATUS Cope. 



Proc. Ac. Phila., 18G9, p. 106; Boulenger, Cat. Batr. Grad. Brit. Mus., ed. 

 u, 1882, p. 67. 



This small species resembles Iq general proportions Hemidactyliuni 

 scutatum. It is well characterized in this genus by its numerous costal 

 plicne and thickened, scarcely compressed tail. 



The width of the head enters the length to the groin C.75 times; the 

 length to axilla enters thrice. The hind limb, extended, i)asses six in- 

 tervals from the groin ; the foot is wide and the toes short, especially 

 the inner and outer; the inner has but one minute joint free. The 

 same may be said of the anterior digits. The tail is compressed a little 

 and considerably thickened; in the smallest specimen the terminal .75 

 above and .33 below are keeled; in others the superior keel is more 

 distal. 



