14 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 124 



we do not know if there are color differences between topotypical 

 M. p. luciae and M. p. plethodon, but we are inclined to doubt 

 that such occur. 



Mensural data for three samples of M. p. luciae are presented in 

 tables 1 and 2. External measurements are available only from our 

 large series from Dominica, but comparison with those of isolated 

 bats from other islands indicates no difference in size. Means and ex- 

 tremes of cranial measurements for the three different populations of 

 M. p. luciae are quite comparable; some measurements (condylobasal 

 length, zygomatic breadth, maxillary toothrow) intimate the exist- 

 ence of a cline, with larger bats in the north, but others (greatest 

 length of skull, postorbital constriction, mastoidal breadth) do not 

 demonstrate this phenomenon clearly, if at all. There is no evidence in 

 bats from the northern part of the range of M. p. luciae of a trend in 

 size toward the much smaller, geographically adjacent Monophyllus 

 redmani portoricensis. 



Two specimens of M. p. luciae (KU 104779, gravid 9; USNM 

 361897, 9) from Dominica are distinctly paler dorsally than other 

 bats from that island. Instead of being the medium to dark brown of 

 all other M. p. luciae, these two bats are pale buffy tan above and 

 only slightly darker (more grayish) below. No other sample of M. 

 redmani or M. plethodon shows such variation. The mentioned differ- 

 ences in color could be due to dichromatism in the population on 

 Dominica or to change in color of the pelage relating to wear and 

 fading. 



Monophyllus has not been reported previously from the islands of 

 Antigua and Barbuda. The specimen from Barbuda was collected by 

 P. W. Hummelinck, and his notes state that the bat was found dead 

 near the entrance of Dark Cave. Dark Cave is situated at the bot- 

 tom of a wooded sinkhole and is about 170 meters long and has three 

 water-filled basins. No other bats of any species were observed in the 

 cave. The four Antiguan M. p. luciae were collected in Bat Cave near 

 English Harbour. Both the caves on Antigua and Barbuda are located 

 in xeric regions. 



Howes (1930, pp. 102-103) reported taking Monophyllus in a cave 

 at Dleau Manioc near the Layou River on Dominica; the cave en- 

 trance lay about 200 feet (61 meters) up on the face of cliffs bordering 

 the river. Howes' report of this bat from Dominica has been over- 

 looked by other workers. Of 16 M. p. luciae collected by the junior 

 author on Dominica, six were netted in banana groves, four were 

 taken in nets across a trail that separated woodlands from a Theobroma 

 grove, and others in a net stretched across part of the Layou River. 

 One individual was netted in a banana grove at Marigot. A male was 

 found dead adjacent to a small cave a few yards from the ocean near 



