TEIID LIZAEDS 01'^ TUE GENUS CNEMIDOPHOEUS 243 



Itiill. Anier. Miis. Nal. llisl., vol. Hi, J1)2L', p. 1)82. — Stejaegek and llAimouK, 

 Check List N.A. Ainph. and Kept., ed. 2, 1923, p. 69. — Sclatee, Zool. Rec. for 

 1922, vol. 59, '• Reptilia," 1924, p. 23.— Burt, Proc. Biol. Soc. Wash., vol. 

 42, 1929, p. ]rj4. 



Diagnosis. — The Monserrate Island race-iunner differs from all 

 of the other members of the lujpei'ythrus group in the absence of 

 longitudinal dorsal stripes and in the fading or loss of the lateral 

 stripes. 



DescH'ption. — Snout rather blunt; nostril anterior to nasal suture; 

 anterior nasal usually not in contact with second upper labial; 

 supraoculars normally 3; supraocular granules extending from as 

 far forward as the center of the third supraocular to the posterior 

 l)order of the second supraocular; frontoparietal entire; parietals 

 3; anterior gulars moderate to large, graded, and decidedly largest 

 centrally; scales of mesoptychium moderate, largest centrally, in 

 5-G transverse rows; postmesoptychial granules present on edge of 

 posterior gular fold. 



Body elongate; ventral plates in 8 longitudinal and 30-33 trans- 

 verse rows; dorsal granules small; limbs well developed; brachials 

 4-C; antebrachials 2-3; brachials continuous with antebrachials at 

 a point of contact; femorals 4-T; tibials 3-4; femoral pores 16-21; 

 tail elongate, tapering, and moderately carinated above; caudal 

 plates large, oblique, keels forming distinct longitudinal lines 

 laterally. 



The ventral coloration is similar to that of C. liyperythrus hijpery- 

 t/wus, but there is an emphasis on blue laterally. The adults have 

 (young without) a distinct reddish brown band on each side, con- 

 tinued from the antefemoral surface of the hind limb forward to 

 the sides of the head; entire dorsal surface unicolor, grayish or 

 light brown; dorsal stripes wanting; lateral stripes faint or absent; 

 tail bright blue in young, brownish or grayish blue in adults. In 

 certain individuals the stripes are faintly indicated laterally, espe- 

 cially anteriorly. The brick-red lateral longitudinal band is absent 

 in the youngest specimens and apparently develops with age, for 

 in the oldest examples it is very conspicuous. 



A summary of data taken on IT specimens of this species, exclu- 

 sive of the type, follows : Body, 40-G8 mm. ; tail, 105-169 ; total 

 length, 152-231; length of tail as percentage of total length, 71.5- 

 75.0; width of head, 7.0-9.5; width of head as percentage of body 

 length, 14.0-17.5; hind leg, 25-43; length of hind leg as percentage 

 of body length, 57.0-75.4; supraocular granules extending forward 

 to center of the third supraocular in 6 specimens, and to posterior 

 border of second supraocular in 11 specimens. 



Rcmqe. — Monserrate Island (Van Denburgh and Slevin, 1921«, 

 p. 98, C.A.S.,M.C.Z.). 



