v^ BREVIORA Museiiim of Comparative Zoology Cambridge, Mass. December 31, 1963 Number 194 A NEW SUBSPECIES OF TROPIDOPHIS GREENWAYI FROM THE CAICOS BANK By Albert Schwartz The species of small boa, TropidopJiis greenwayi, has hereto-fore been known only from Ambergris Cay.^ No additional speci-mens of T. greenwayi have been taken since the type and paratype were collected in 1936. At the time of their review of the Carib-bean snakes of the genus TropidopJiis, Schwartz and Marsh (1960) examined the two extant specimens and separated them from the Cuban and Bahaman species T. pardalis (with which they had been nomenclatorially associated) and T. canus (to which they might be expected on geographic grounds to be related). From January 11 to 22, 1961, the writer and David C. Leber collected on South Caicos and its adjacent Long Cay and visited the Ambergris Cays as well in order to secure additional speci-mens of T. greenivayi and to ascertain if this snake were more widely distributed on the Caicos Bank. We were unable to find the boa on the Ambergris Cays, but a series of fourteen individ-uals was collected for us on South Caicos and Long Cay by resi-dents of these islands. Comparison of this large series with the two specimens of topotypic T. greenwayi indicates that the South Caicos and Long Cay populations represent a different form, which may be called : Tropidophis greenwayi lanthanus, new subspecies Type: Museum of Comparative Zoology (MCZ) 69630, from 0.5 mi. north of Cockburn Harbour, South Caicos, taken 22 Janu-ary, 1961, by a native for A. Schwartz. Paratypes: MCZ 69619, 0.5 mi. east of Cockburn Harbour, South Caicos, 13 January, 1961 ; MCZ 69632, same locality, 14 lActually, "Ambergris Cay" is one of a pair of cays, both known as the Amber-gris Cays, which lie about 13 miles southwest of Cockburn Harbour on South Caicos.