RHYNCHONYCTERIS.—SACCOPTERYX. oT 
interfemoral membrane and lies free on its upper surface, or is considerably produced 
beyond its posterior margin, with simple nostrils, devoid of any leaf-like appendages. 
The first genus, according to the arrangement here adopted, is the very peculiar- 
looking form named Prodoscidea by Spix; but that name having been long preoccupied 
in zoology, Professor Peters has substituted Rhynchonycteris. In this Bat the muzzle 
is produced into a long slender snout, reaching far beyond the opening of the mouth; 
the ears are very narrow and much tapered, and the intermaxillaries are ossified. Only 
one species is now recognized as valid, a small Bat with a forearm of about 1-40; the 
fur greyish-brown above and whitish-grey beneath. 
1. Rhynchonycteris naso. 
Vespertilio naso, Max. zu Wied, Schinz’s Thierr. i. p. 179 (1821, descr. orig.)*; Beitr. Nat. Bras. 11. 
p- 274°; Abbild. t. xviii.’ 
Proboscidea saxatilis, Spix, Sim. et Vesp. Bras. p. 62, t. xxxv. fig. 8 (1823, descr. orig.)*. 
Proboscidea rivalis, Spix, loc. cit.’ 
Rhinchonycteris naso, Peters, Monatsb. Ak. Berl. 1867, p. 478°. 
Rhynchonycteris naso, Dobson, Cat. Chir. Brit. Mus. p. 367, t. xx. fig. 4”. 
Hab. Guatemaa, Yzabal (Salvin & Godman, Mus. Brit."); Honpuras (Mus. Brit.”).— 
Gutana®; Peru®; Braziw®. 
The range of the Long-nosed Bat extends from Brazil to Guatemala. Both Prince’ 
Wied and Mr. Dobson (who met with the species in British Guiana) give a similar 
account of its habits. It frequents the neighbourhood of forest-streams, remain- 
ing all day clinging, in parties of from ten to twenty individuals, to the vertical 
face of a rock or to the underside of a sloping tree-stem. In such a situation, Mr. 
Dobson remarks, “ they looked like so many pinned specimens of the genus Papiiio, the 
separated legs resembling the tail-like projections from the posterior margins of the 
wings of these insects. So flatly did they adhere to the smooth surface of the wood, and 
so well did the greyish fur of their bodies, and the small tufts of greyish hairs on the 
antebrachial membrane and on the wing-membrane on the outer side of the forearm, 
counterfeit the weathered surface of the wood, that it was some time before the little 
colony could be distinguished.” Towards evening these Bats hunt along the streams, 
probably taking insects from the surface, a pursuit for which Mr. Dobson suggests 
that the downward position of the opening of the mouth is peculiarly adapted’. 
Messrs. Salvin and Godman’s specimen was one of a flock disturbed from the wooded 
shore of the Lake of Yzabal, and knocked down by a paddle as it passed the canoe. 
2. SACCOPTERYX. 
Saccopteryx, Iliger, Prod. Syst. Mamm. &c. p. 121 (1811). 
The second Central-American genus of Emballonuride has broad ears, sometimes 
united at their base, and a well-developed tragus; in repose the first joint of the middle 
E 2 
