440 bulletin: museum of comparative zoology. 



Variation: — The females and young difPer in general from the adult 

 males by the presence of a pale line margined with blackish on each 

 side of the body. In several specimens the pale line is indistinct and 

 only the broad dark bands are present. Females are generally 

 browner than the males and have a series of narrow blackish cross- 

 bars on the back and flanks the interspaces of which are filled with 

 roundish spots of isabella, more numerous posteriorly. The tail and 

 the upper surfaces of the legs are similarly spotted. The young are 

 generally more brightly colored than the females. 



Remarks: — The description was made of a full grown adult male 

 that measured one hundred and forty-five millimeters from snout to 

 vent. 



Habitat: — Common along the coast line of Porto Rico in the 

 neighborhood of salt and fresh water preferably where the ground 

 is sandy or gravelly; also found in the interior along the river courses 

 but not reaching the high altitudes. Common in Saint Thomas, 

 especially in the hills back of Charlotte i.\malie, also in Vieques, St. 

 John and Water Island, but probably extirpated in St. Croix where it 

 was found before the introduction of the mongoose. 



List of specimens examined. 



6082-83 6 all both San Juan, Porto Rico 1879 S. Garman 



Ameiva alboguttata Boulenger. 



Description:— MviM male; M. C. Z. 7898. Mona Island, W. I., 

 1908; B. S. Bowdish. 



Similar to A. cxsul in scutation except for the following: — five 

 occipitals in a transverse row, the two adjacent to the median largest; 

 last two supraoculars separated from the outer occipitals by four or 

 five rows of small scales; four large infralabials and a fifth small one 

 at the anterior extremity ; preanal plates consisting of three large ones 

 forming a triangle and two slightly smaller marginal ones on either 

 side; on the upper arm a series of brachials more spherical than those 

 of A. exsul; thirteen and fourteen femoral pores; about thirty -five 

 scales in the fifteenth ring from the base. 



