6 
ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
long, and of an uniform rich brown colour, and extends on to the base of the 
interfemoral membrane above and below ; the remainder of this membrane is 
bare, and, together with that of the wings, of a black colour. 
In. 
Lines. 
In. 
Lines. 
Length of the head and body 
. 1 
8 
Length of the tragus 
. 0 
H 
the tail 
. 1 
the antibrachium . 
. 1 
H 
Expanse of the wings . 
. 8 
3 
the thumb (claw included) 
. 0 
H 
Length of the ear 
. 0 
the tibia 
. 0 
6f 
Habitat, Chiloe. {January.) 
“ This specimen was given me by Lieut. Sulivan, who obtained it amongst 
the islets on the Eastern side of Chiloe. It is not, I believe, common, nor do the 
humid and impervious forests of that island appear a congenial habitation for 
members of this family. It must, however, be observed, that even in Tierra del 
Fuego, where the climate is still less hospitable, and where the number of 
insects is surprisingly small, I saw one of these animals on the wing.” D. 
Family — NOCTILIONIDiE. 
Dysopes nasutus. 
Molossus nasutus Spix, Simiarum et Vespertilionum. Braziliensium species novae. Nyctinomus Brazi- 
liensis. — Geoffrey, Annales des Sciences Naturelles, tom. i. p. 337. pi. 22. 
Of this species I find three specimens in Mr. Darwin’s collection — “ It is re- 
markable,” says Mr. Darwin, “ for its wide geographical range. I obtained 
specimens at Maldonado, on the northern bank of the Plata, where it was ex- 
ceedingly numerous in the attics of old houses, and likewise at Valparaiso in 
Chile. Molina (vol. i. p. 301.) says another species is found in Chile, of the 
same size and figure, but of a more orange {naranjado) colour.” 
Upon comparing the dimensions of several specimens of this species with 
those given by Temminck in his “ Monographic sur le Genre Molosse,” I find 
that they vary very considerably ; I shall therefore be adding some little to the 
history of the species, by giving the dimensions of those now before me, together 
with the sexes of the specimens measured, and their localities. In all these 
specimens there is a series of pointed tubercles along the upper margin of the 
ears, a character which M. Temminck has omitted to notice. They vary slightly 
