1893.] NATURAL SCIENCES OF PBILADEI.PHIA. 429 NOTES ON SOME SNAKES FROM TROPICAL AMERICA LATELY LIVING IN THE COLLECTION OF THE ZOOLOGICAL SOCIETY OF PHILADELPHIA. By ARTHUR ERWIN BROWN. Nearly all of the specimens on which these notes are based, are now in the Academy's collection, but have all been living in the garden of the Zoological Society. The greater number of them were contained in a collection made by Dr. O'Reilly, of Trinidad, who is responsible for the localities of collection in these cases. The colors given, were in all cases, taken from the living specimen. Boa diviniloqua (Lain -.). One specimen from St. Kitts. 65 rows of scales ; ventrals, 266 ; subcaudals, 54; 16 scales in orbital ring; in contact with labials, 15 scales across top of head, between orbits ; thirty-two spots on body; six on tail. Total length, 1,700 mm. (tail 152). Boa imperator Daud. One specimen, probably from Vera Cruz. 68 rows of scales ; ventrals, 246; subcaudals, 66 ; 19 scales in orbital ring ; in contact with labials on one side, separated by one row of scales on the other ; 13 scales between orbits; twenty-two spots on body, four on tail. Total length, 1,010 mm. (tail 105). Ungualia melanura (Schlegel). Three specimens from Cuba. (a). 27 rows of scales, three exterior smooth ; ventrals, 202 ; subcaudals, 40. Total length, 571 mm. (tail 76). Body color dark gray, slightly lighter on sides ; abdomen and five exterior rows of scales, light gray ; a row ot small dark spots alternating on each side of the back ; two rows of black dots on the first and fifth rows of scales, about five scales apart longitudinally. An occasional similar dot on the ventrals ; top of head, dark ; sides of head, chin and throat, light gray maculated with black. (6) 27 rows of scales, three exterior smooth; ventrals, 201. Total length, 533 mm. (tail broken). Color very similar to specimen a. The sides and belly have a salmon tinge and the dorsal spots tend to coalesce into a zigzag line.