Note 244 — Chapter VI · FAMILY VI.—PHYLLOSTOMIDÆ, OR VAMPIRES.

The rest of the species forming the group Glossophaga have three premolars on each side in each jaw, and the inner upper incisors smaller than the outer ones. The lower incisors are more or less deciduous, and sometimes altogether wanting in the adult. Lonchoglossa caudifera has a well-developed zygomatic arch, and the interfemoral membrane, tail, and spurs very short. It is from Western Brazil and Surinam. The tail in this species is liable to be withdrawn, or lost in preparing the skin of the animal, and hence it has been described under the rather contradictory names of caudifera and ecaudata, and a distinct genus (Anura) was established upon the apparently tailless specimens. In Glossonycterus lasiopyga the zygomatic arch is deficient, and the tail is wanting; the spurs and interfemoral membrane are very short, and the latter is covered with hair. It is an inhabitant of Mexico. Chœronycteris mexicana, from Mexico, and C. minor, from Surinam, have a well-developed interfemoral membrane enclosing a very short tail. The anterior molars are very narrow, and the first upper premolar is deciduous.