446 PROCEEDINGS OF THE NATIONAL MUSEUM vol. b9 



Specimens collected. — Twenty-three. Pueblo Bello, 2 males (in 

 alcohol); El Salado, 2 males; Colonia Agricola de Caracolicito, 1 male; 

 Sierra Negra, Sierra de Pcrijd, 4 males, 14 females. 



Measurements. — Head and body,87-100; hind foot, 16-21 ; ear,23-25; 

 forearm, 66-73.6; length of skull to front of incisors, 29.2-31.5; mastoid 

 width, 15.7-16.9; width of brain case, 13.0-13.9; zygomatic breadth, 

 18.4-19.6; maxillary width across first molars, 12.8-14.1; width across 

 cingula of canines 8.6-9.1; canine to back of second upper molar, 

 10.8-11.4; length of mandible to front of incisors, 20.7-21.9. 



Bemarks. — The abundant and reliable data presented by Andersen 

 {op. cit.) in his revision of the genus Artibeus do not support his 

 conclusions that A. planirostris and A. jamaicensis are distinct species 

 each composed of a group of large and a group of small races. Once 

 the presence or absence of the rudimentary third upper molar is dis- 

 counted as a variable (see "Remarks" under A. jamaicensis), nothing 

 is left by which to distinguish the large "race" of Andersen's ^Zam- 

 rostris from the large ones of his jamaicensis, and the small "races" of 

 his planirostris from the corresponding ones of jamaicensis. It 

 becomes clear, then, that the smaller "races" of each compose one 

 species which should be designated as jamaicensis Leach, and the 

 larger "races" form together another species for which the earliest 

 available name is lituratus Olfers.® Andersen could not demonstrate 

 intergradation betw^een the large and the small "races" composing 

 each of his species. He implied, however, that additional material 

 would show this. Moreover, he interpreted the occurrence of indi- 

 viduals of both the large and the small "races" in any one locality as a 

 migratory invasion of the one into the territory of the other. This 

 conjecture is baseless. The considerable amount of material since 

 accumulated (also, see Anthony, Amer. Mus. Nov. No. 114, p. 5, 1924) 

 confirms the specific discreetness of the large and small forms and adds 

 to the very evidence presented, but otherwise either ignored or mis- 

 interpreted, by Andersen himself, that the normal range of both 

 species, the large and the small, is coextensive from Mexico into 

 southern Brazil, and on some of the Neotropical islands. The sub- 

 specific names recognized as valid by Andersen plus two forms, 

 richardsoni and fraterculus, described since, may be arranged as 

 follows: 



Artibeus jamaicensis jamaicensis Leach, type locality, Jamaica {richardsoni 

 Allen, with type locality, Matagalpa, Nicaragua, a synonym). 



A. j. parvipes Rehn, type locality, Cuba. 



A. j. yucatanicus Allen, type locality, Chich6n-Itzd, Yucatdn, Mexico. 



' "Ph. lituratus 111.," in Eschwege, "Journal von Brasilien," Neue Bibliotheck der Reisebeschreibungen 

 zur Erweiterung der Erd- und Wolkerkunde, Weimar, vol. 15, No. 2, p. 224, 181S, antedates "Phyltostomus 

 lituratus 111.," Lichtenstein, Verzeichniss der Doubletten . . ., p. 3, 1823. Both authors based the name 

 lituratus on Azara's chauve souris obscure et rayie, Olfers giving Paraguay as the type locality. 



