1908.] DR. KNUD ANDERSEN ON BATS, 217 



Uroderma has a narrow line of whitish fur down the middle of 

 the nj)per side, sometimes ill-defined, but never quite obliterated ; 

 Artiheus has no trace of a dorsal line. 



Species. — Two, U. hilohatum and thomasi. 



Range. — From Sao Paulo and Bolivia to Costa Rica ; un- 

 represented in the West Indies (Trinidad excepted). 



Remarks. — Uroderma was proposed by Peters (^. s. c.) as a 

 generic name for those known species of '•'■Artiheus" which have f 

 molars, viz., at Peters's time, A. hilohatus,fallax, and concolor. The 

 name, in this sense, was adopted by Dobson (I. s. c), though only 

 as the designation of a " subgenus " of Artiheus, and he recognised 

 two species only, A . hilohatus and planirostris, the latter including 

 Peters's /a/^aa; as a " synonym" and concolor as a " variety." The 

 number of species would now be five : hilohatus, thomasi, concolor, 

 planit'ostris, hirsutus. — In 1901, Rehn (l.s.c.) proposed to restrict 

 the name Uroderma to A. hilohatus, on account of its elongate 

 skull, noticeably higher rostrum, and "two rounded lobes" on 

 the lateral margins of the horseshoe. 



Any subdivision of the genus " Artiheus," in its old sense, 

 according to the number of molars (|^, f , or %) is artificial. The 

 natural subdivisions are these two : A. hilohatus and thomasi on 

 one side {Uroderma), all other species on the other {Artiheus). 

 There is a wide gap between Uroderma and Artiheus, in this 

 sense, whereas all species referred to Artiheus in the present 

 paper, irrespective of the presence or absence of the rudimentary 

 m' and m.,, are extremely closely inter-related. Uroderma differs 

 both in the shape of the skull and in several important dental 

 characters, and it is in these respects not approximated by any 

 species of Artiheus. As to the dental characters pointed out 

 above (pp. 214-216), nos. 1 (bilobate outer upper incisors), 4 (posi- 

 tion of m^), 5 (position of cusp 5 of m"), and 6 (no cusp 2 in n\^ 

 constitute absolute differences between Uroderma and Artihetts, 

 though a slight restriction is perhaps advisable with regard to 

 no. 1, in so far as in some species of Artiheus the outer upper 

 incisor can show, rarely and as a perfectly individual aberration, 

 a faint leaning towards a bifid shape ; as to nos. 2 (cingulum of 

 lower canines), 3 (cusp 4 of p*), and 7 (size of m„), the difference 

 is one of degree only. In having a narrow line of white fur down 

 the middle of the upper side, Uroderma is similar to the majority 

 of species of VampyrojJs and allied genera, but different from all 

 species of Artiheus. 



Uroderma bilobatum Pet. 



1842. Fhyllostoma species inedita Riippell, Verzeichiiiss der in dem Museum der 

 Senckenbergiscben naturforschenden Gesellschaft aufgestellten Sammlungen, 

 i. p. 11, no. II. D. 3 a.— Brazil ? 



1865. Fhijllostoma jpersonatuvi (not Wagner) Peters, MB. Akad. Berlin, pp. 587-88, 



footnote. 



1866. Uroderma hilohatum Peters, MB. Akad. Berlin, p. 394. — Sao Paulo; Cayenne. 

 1878. Artiheus hilohatus Pet., Dobson, Cat. Chir. Brit. Mus. pp. 518-19, 



1880. Artiheus {Uroderma) hilohatus Pet., Thomas, P. Z. S. p. 396. — Sarayacu, 

 Ecuador. 



