36 BULLETIN If) 4, UNITED STATES NATIONAL MUSEUM 



iiit'soptycliial ariiiiiilcs luiiuitt'. soiiictiiiics cxtciKliiii:' i'oi'waixl over 

 the edji'e of (lie posterior otilar fold. It has hceii ol)serve(l that 

 smaller iiiesoptychial scales occur in specimens collected in the lower, 

 more sandy areas, and that larger ones appear in those collected at 

 hifjliei'. moi'e brushy, or rocky, elevations. 



Body elon<j;ate; ventral i)lates in 8 longitudinal and "JT-^^G ti'ans- 

 verse rows; anal s])urs often well developed; dorsal granules small; 

 liml)s well developed; brachials o-S; antebrachials 2-4; brachials 

 usually continuous with antebrachials at a point of contact; ])Ost- 

 antebrachiais granular or slightly enlarged; postbrachials small, 

 rindifi'ereiitiated; femorals -J— 7; tibials 2-4; femoral pores ° 15-29; 

 tail elongate, tai)ering, with rather strong continuous longitudinal 

 keels; ventral caudals usually ridged and with more or less delinite. 

 longitudinal keels. 



Coloration moderately variable; lower surfaces white to brigiit 

 blue; lower fiank's blue, gray, dusky, brown, greenish, or olivaceous; 

 tail while to slaty below, bright blue in young and sometimes even 

 in the adult, often olivaceous above; femora usually spotted or 

 reticulated with white, but sometimes unicolor; dorsal gronncl color 

 ])rownisli, olivaceous, gray, bluish, or black; young with from 

 to 10 light stripes, usually with 1>; adults lined or without lines, 

 spotted or unspotted; if no lines are present, there may be a more 

 or less distinct dark dorso-lateral streak or band, above which the 

 ground color is essentially bluish or olivaceous. 



In a few of the smaller sj)ecimens which possess an even number 

 of stripes, j^articularly from Honduras and northwestern Brazil, a 

 widened yellowish middorsal streak is present as in sexHueafiis. 



A series of 91G specimens of lemnJxcatus has been examined. 

 JNIeasurements on a representative lot of ;)0() of these are as follows: 

 Body, 31-104 mm.; tail, 78-226; total length. 109-330; width of 

 head, 5-15. The following data were secured from a total of 800 

 .'specimens: Parietals. 3 in 1 specimen, 4 in 3 specimens, 5 in 774 

 specimens, and 6 in 22 specimens (thus, only 0.5 per cent of lemnls- 

 eatus have less than the "normal" 5 parietals) ; supraoculars, 3-^ 

 Jn 12 specimens, 4 in 714 specimens, 4—5 in 44 specimens, 5 in 29 speci- 

 inens, and 5-6 in 1 specimen (thus, only 0.75 per cent of the speci- 

 mens have less than 4 supraoculars) ; supraocular granules extending 

 forward to the antei-ior border of the fourth supraocular in 106 

 s])ecimens, to the middle of the third supraocular in 680 specimens., 

 to the anterior liorder of the third supraocular in 12 specimens, and 

 to the anterior l;order of the second supraocular in 2 specimens. 



Yanation. — The sexual dim()r])hism shown by lemniscafus in cer- 

 tain areas was noted b}^ Boulenger (1885, p. 363). He showed that 



^Cohn (1003, 185-192) has presonted an illustratod histolojiicnl study of the fpniinal 

 pores of this lizard, demonstrating- their glandular nature. 



