RODENTIA—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 to other 
genera, and have been already quoted under their appropriate heads. These are principally as 
follows: 
Arvicola campestris, Aud. & Bach. = Hesperomys campestris, Lec. page 485. 
Jerrugineus, Harlan = Sigmodon hispidus, Say & Ord., page 502. 
hortensis, Harlan= the same species, probably. 
nuttalli, Harlan = Hesperomys nuttalli, page 467. 
oryzivora, Aud. & Bach. = Hesperomys, (Oryzomys) palustris, page 482. 
sonoriensis, Aud. & Bach. = Hesperomys sonoriensis, Lec. 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. 
70L 
