THE FAMILIES AND GENEEA OF BATS. 165 



molars with hypocone much lower than protocone, first lower molar 

 with well-developed metaconid connected with ridge on inner side of 

 protoconid, and palatal emargination with sides strongly converging, 

 in continuation of the divergent pterygoids. 



Species examined. — Phyllops falcatus (Gray). 



Remarks. — This genus is well differentiated from Ardops by the 

 structure of the first lower molar and the form of the palate. 



Genus ARITEUS Gray. 



1837. AriteuH Gbay, Mag. Zool. and Bot, II, p. 491, December, 1837 (flaves- 



cens—achrailophihis). 

 1870. Peltorhiinis Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 



p. 433 (acliradophilus). 

 1878. Peltorhinus Dobson, Catal. Chiropt. Brit. Mus., p. 527 ((subgenus of 



Stenoderma) . 



Type-species. — Ariteus flavescens Gray = Artibeus achradophilus 

 Gosse. 



Geographic distrib ution. — Jamaica. 



Number of forms. — The type species is the only form known. 



Characters. — Dental formula : 



-2 3. 1. --3456- -2-2 1-1 2-2 2-2 QA 



12-. 1. -2-4567 2-2' 1-1'^ 2-2' 3-3" 



Like Ardops, but without the small upper molar; first lower molar 

 with minute though evident metaconid. 



Species examined. — Ariteus achradophilus (Gosse). 



Remarks. — The presence of the metaconid in m x and the absence of 

 m 3 distinguish Ariteus from Ardops. Not only is the last upper 

 molar absent, but the maxillary is too narrow behind m 2 for the small 

 tooth to occur. 



Genus STENODERMA Geoffroy. 



1813. Stenotic i ma Geoffroy, Descr. de I'lSgypte, II, p. 114 (rufum). 



1855. Artilxrus Gervais, Bxped. du Comte de C'astelnau, Zool. Mamm., p. 34. 



(part, undatus=rufus). 

 1869. Hixtiopa Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, p. 



433 (undatus=rufus) . 

 1876. Stenoderma Peters, Monatsber. k. preuss. Akad. Wissensch., Berlin, 



p. 430, pi. I, figs. 1-6 (rufum). 

 1878. Stenoderma Dobson, Catal. Chiropt. Brit. Mus., p. 526 (part, rufum). 



Type-species. — Stenoderma rufum Geoffroy. 



Geographic distribution. — Unknown. 



Number of forms. — The type is the only known species. 



Characters. — Dental formula : 



-23. 1. --34567 .2-2 1-1 2-2 3-3 QO 



c T ~^,pm 0>'" 1 q^q= 32 - 



12-. 1.-2-4567 2- 2' u \-V r 2-2' '"3-3" 



