18S0.] ON A NEW SPECIES OF REITHRODON. 691 



154. AziNIS HILARELLA. 



Jzinis hilareUa, Walker, Cat. Lep. Het. xxviii. p. 542 (1863). 



Three fine specimens. The genus is easily distinguished from 

 Hyponomeuta by the broadly expanded abdominal border of the 

 secondaries; H. circumdatellus and H. asmmensis must be referred 

 to Azinis. 



TiNEID-E, 



155. Tinea tapetzella. 



Ti7iea tapetzella, Linnseus, Syst. Nat. x, p. 536 (1766). 

 One specimen, 



4. Description of a new Species of Reithrodon, with Remarks 

 on the other Species of the Genus. By Old field 

 Thomas, F.Z.S., British Museum. 



[Keceived December 6, 1880.] 



The subject of the present description was obtained by the late 

 Mr D. Dyson ui Venezuela, and is now in the British Museum. 

 It belongs to a well marked and most interesting species, which I 

 propose to name after my friend Mr. E. R. Alston, whose work on 

 Rodents generally, and especially on those of America, is well known 

 to all interested in the subject. 



Reithrodon alstoni, sp. n. 



Form rather slender and rat-like, not so stout as in the other 

 species. Ears rather short : laid forward they do not reach to the 



Fig. 1. 



Higbt Mnd foot of Reithrodon alsioni. 



eye. Limbs short, fifth toe of both fore and hind feet barely 

 reaching to the end of the fourth metacarpal or metatarsal, as in 

 M. typicus and R. cmiculoides, thus differing from R. chinchiUoides 



