RODEJVTIA ARVICOLINAE ARVICOLA. 553 



I have thus mentioned all the residuary species of N. American Arvicola that have come to 

 my knowledge. There are still some others described as Arvicola, but really belonging toother 

 genera, and have been already quoted under their appropriate heads. These are principally as 

 follows : 



Arvicola campestris, Aud. & 'Bach. =z Hesperomys campestris, Lee. page 485. 

 ferruginous, Harlan =: Sigmodon hispidus, Say & Ord., page 502. 

 hortensis, Harlan = the same species, probably. 

 nuttalli, Harlan = Hesperomys nuUalli } page 467. 



oryzivora, Aud. & Bach. = Hesperomys, (Oryzomys) palustris, page 482. 

 sonoriensis, Aud. & Bach. =: Hesperomys sonoriensis, Lee. page 474. 

 texana, Aud. & Bach. == Hesperomys texana, Woodhouse, page 464. 

 texiana, Aud. & Bach. = Sigmodon texiana?, page 552. 



Hypudaeus leucogaster, Max. = Hesperomys (Onychomys) leucogaster, page 480. 

 The species in the preceding enumeration most likely to be additional to those I have described 

 in detail are : Arvicola borealis, drummondii, nasuta,? richardsonii, rubricata, and xanthognathus. 



70 L 



