184 bulletin: museum of comparative zoology. 



there, however. Of these two species, C. macleayii seems to be most 

 nearly related to the continental C. personata, whose range is from 

 Brazil north at least to Guatemala; C. parnellii, on the other hand, 

 is nearer to C. rvbiginosa, whose range is probably coextensive with 

 that of C. personata on the mainland, where it is known from Brazil 

 to Mexico. It seems strange that neither species should have yet 

 been found in the Lesser Antilles, although C. rvbiginosa is known from 

 Trinidad. Among the Greater Antilles, each has developed a peculiar 

 race on each of the larger islands. The race of C. macleayii found 

 in Jamaica (grisea), is considered by Rehn to be the best marked of 

 any of the subspecies; while the same seems to be true to a lesser 

 degree of the Jamaican race of C. parnellii. 



The case of Mormoops is somewhat similar to that of Chilonycteris. 

 It is known as yet from Jamaica, Cuba, San Domingo, and Porto 

 Rico, of the West Indies. The Jamaican species M. bluinvillii is 

 peculiar to that island, but in the other islands the subspecies cinna- 

 momea takes its place. This differentiation is somewhat paralleled 

 by that of its continental prototype, M. megalophyUa, of which a 

 northern subspecies is recognized in northern Mexico and southern 

 Texas. Although the latter species ranges through northern South 

 America to Trinidad, it is still unknown from the Lesser Antilles, 

 indicating, possibly, that its extension thus far to the eastward took 

 place mainly after the land connection with these islands had become 

 destroyed. 



The distribution of the genus Otopterus in the West Indies seems 

 somewhat similar, except that it is known from the Bahamas as well 

 as from the larger islands of the Greater Antilles. It has not yet been 

 reported from Porto Rico, where, nevertheless, it may confidently 

 be expected. So far as known, Otopterus is not found south of Guate- 

 mala, whence it ranges north into southern and Lower California. 

 Its Antillean distribution is therefore of unusual interest, since, 

 if we assume that its range has always been north of Panama, there 

 is no way of its having reached the Lesser Antilles through a land 

 connection from South America. That it does not pass eastward of 

 Porto Rico is therefore quite what would be expected, if the deep cleft 

 between the Virgin Islands and Anguilla is considered to have been 

 the barrier between the two chains of islands. In Jamaica, Cuba, 

 San Domingo, and the Bahama archipelago, respectively, local races 

 of the single species 0. waterhousii have been developed that differ 

 but slightly among themselves. Apparently the Jamaican form, 

 in its smaller foot and skull is nearer the continental 0. mexicanus 



