50 CHIROPTERA. 
16. STURNIRA. 
Sturnira, Gray, Ann. & Mag. Nat. Hist. x. p. 257 (1842). 
Sturnira differs conspicuously from the preceding genera in the rudimentary state of 
the interfemoral membrane—which is reduced to a narrow fringe along the hind legs, 
hidden by the fur. The chin is marked with a flat median protuberance, surrounded. 
by smaller warts; the molars are longitudinally grooved ; and, as in the next genus, the 
males are decorated with an epaulet-like tuft of light-coloured hair on each shoulder. 
Two species have been generally recognized, but only one is accepted by Mr. Dobson. 
Its colour is variable, usually brown, more or less washed with red ; and the forearm 
measures about 1""70. 
1. Sturnira lilium. 
Phyllostoma lilium, Et. Geoffroy, Ann. du Mus. xv. p. 186 (1810, descr. orig.)’. 
Sturnira spectrum, Gray, Ann. & Nat. Hist. x. p. 257 (1842, deser. orig.)*; Zool. Voy. ‘ Sulphur,’ 
p- 22, pl. vi. fig. 1°. 
Stenoderma chilense (Gervais), Gay, Hist. de Chile, Mamm. p. 30, pl. i. fig. 1 (1847, descr. orig.)*. 
Sturnira chiloensis, Frantzius, Arch. f. Naturg. xxxv. 1, p. 262 (nec Vespertilio chiloensis, Waterh.)’. 
Sturnira lilium, Dobson, Cat. Chir. Brit. Mus. p. 538, pl. xxx. fig. 4°. 
Hab. Guatemaa (Mus. Berol.); Honpuras (Dyson, Mus. Brit.®) ; Costa Rica (Frantzius’, 
& Hoffmann, Mus. Berol.).—Wust Inpies®; PErv®; Brazit’ ;x Paraguay’; Cait". 
This Bat has a wider southern range than most of the species on our list, going as far 
south as Paraguay’ and Chili*. It appears to be not uncommon in most of the Central- 
American States, but has not yet been recorded from Mexico. 
17, CENTURIO. 
Centurio, Gray, Ann. & Mag. Nat. Hist. x. p. 259 (1842). 
Excepting perhaps Mormops, the Bats of the present genus are the most grotesquely 
hideous of the whole order. Resembling the genera last described in general structure, 
Centurio differs in having only one lower premolar on each side; in the peculiar trans- 
parent patches on the wing-membranes, puckered into transverse folds by parallel mus- 
cular bands ; in the large lobate ears; and, above all, in the appearance of the naked 
face, which is covered all round the greatly shortened muzzle with deep wrinkles and 
raised ridges, symmetrically disposed and forming a most strange pantomimic mask in 
which the nose-leaf may be said to be lost. Under the chin pass several transverse 
ridges, which vary in number and development in the two described species, both of 
which are natives of our subregion, and which may be thus diagnosed :— 
