32 CHIROPTERA. 
the upper incisors are closer together. Mr. Dobson, however, considers that when a 
sufficient series of specimens are compared, these variations will be found to be unim- 
portant®; and in the absence of the materials for such a comparison, I follow him in 
treating WZ. obscurus provisionally as a variety of IZ. rufus. 
An interesting account of this Bat (under the name of VM. fumarius) will be found in 
the late Mr. W. Osburn’s paper on the Chiroptera of Jamaica, in the ‘ Proceedings of the 
Zoological Society ’ for 1875. It is highly gregarious in its habits, the sexes keeping 
very much apart; and it inhabits both the roofs of houses and hollow trees. The males, 
which are provided with a large gular pouch, have a most offensive smell, especially 
during the breeding-season. 
2. Molossus nasutus. 
Molossus nasutus, Spix, Sim. et Vesp. Bras. p. 60, t. xxxv. fig. 7 (1823, descr. orig.)'; Peters, 
Monatsh. Ak. Berl. 1865, p. 576°; Dobson, P. Z. 8. 1876, p. 711°; Cat. Chir. Brit. Mus. 
p. 414, t. xxi. fig. 2%. 
Molossus fumarius, Spix, Sim. et Vesp. Bras. p. 60, t. xxxv. figs. 5, 6 (1823, descr. orig.)’. 
Hab. GuateMaa, Duefias (Salvin, Mus. Brit.).—Braziv}. 
By a comparison of Spix’s types, Professor Peters was able to show that J. nasutus 
and M. fumarius are really only synonyms?; and Mr. Dobson has since fully described a 
specimen, obtained by Mr. Salvin in Guatemala, and preserved in spirits in the British 
Museum. Although both names have been frequently used by writers, these speci- 
mens are the only ones yet known to exist in European Museums; and the last 
mentioned is the more valuable, as Spix’s types are dried and in very bad condition. 
Mr. Dobson observes that this species is quite intermediate between WM. rufus (sub- 
genus Molossus) and M. abrasus (subgenus Promops), agreeing with the former in the 
shape of the ear and distribution of the fur, and with the latter in dentition‘. 
3. Molossus abrasus. 
? Molossus ater, Et. Geoffroy, Ann. du Mus. vi. p. 153 (1805, deser. orig.)’*. 
Dysopes abrasus, Temminck, Mon. de Mamm. i. p. 232, t. xxi. (1827, descr. orig.)?. 
Molossus abrasus, Peters, Monatsb. Ak. Berl. 1865, p. 574°; Dobson, P. Z. S. 1876, p. 712‘; Cat. 
Chir. Brit. Mus. p. 415, t. xxi. fig. 3°. 
Hab. Guatemaua, Coban (Salvin, Mus. Brit.5)—Gutana>; Pervu®; Braziu!, 
Whether or not this may be the species named Molossus ater by ‘Geoffroy, there can 
be no doubt as to its being the Dysopes abrasus of Temminck, his type in the Leyden 
Museum having been examined by Professor Peters‘. Its range appears to extend from 
the interior provinces of Brazil, whence it was first described, to Guatemala, where 
Mr. Salvin obtained several specimens at Coban. 
