440 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Variation: — The females and young differ 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 Amalie, also in Vieques, St. 
John and Water Island, but probably extirpated in St. Croix where it 
was found before the introduction of the mongoose. 
Inst of specimens examined. 
No. of 
M.C. Z. _ speci- 
No. mens Ages Sexes Locality Date Collector Remarks 
2748 Lo adso) o& » St.Thomas, D. W: I. '1872) L. Agassiz!) “Desemm 
5432 leads Q@ St.Thomas, D. W.I. 1879 S. Garman J 
5433 4 all both St. Thomas, D. W.I. 1879 S. Garman 
6082-83 6 all both SanJuan, Porto Rico 1879 S. Garman 
AMEIVA ALBOGUTTATA Boulenger. 
Description:— Adult male; M. C. Z. 7898. Mona Island, W. L., 
1908; B.S. Bowdish. 
Similar to A. exsul 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. 
