MILLER AND REHN: NORTH AMERICAN MAMMALS. 313 
\ 
arcticus (Lepus), 179. 
arcticus (Peromyscus), 84. 
arcticus (Putorius), 222. 
arcticus (Rangifer), 19. 
arcticus (Sorex), 236. 
Arctocephalus, 192. 
townsendi, 192. 
ursinus, 192. 
Arctogale, 222, 224. 
Arctoinys, 58. 
a varus, 59. 
beecheyi, 50. 
bobac. 58. 
canadensis, 59. 
citellus, 58. 
columbianus, 48. 
dacota, 58. 
douglasii, 50. 
empetra, 58. 
flaviventer, 58. 
franklinii, 49. 
ignavus, 59. 
lewisii, 58. 
ludovicianus, <57, 58. 
marmota, 58. 
inonax, 59. 
Olympus, 59. 
phaeognatha, 49. 
pruinosus, 59. 
richardsonii, 54. 
Arctopithecus castaneiceps, 8. 
arctos (Ursus), 232. 
arenacea (Neotoma), 101. 
arenarius (Geoinys), 137. 
arenarius (Perognatlms), 161. 
arenarius (Peromyscus), 73, 83 . 
arenicola (Onychomys), 67. 
arenicola (Perognathus), 157. 
argentatus (Scalops), 249. 
aries (Ovis), 22. 
arizonae (Lepus), 184. 
arizonae (Neotoma), 101, 106 . 
arizonae (Peromyscus), 84. 
arizonae (Sigmodon), 90. 
arizonae (Sitomys), 84. 
arizonae (Spilogale), 216. 
arizonensis (Cynomys), 57- 
arizonensis (Microtus), 119. 
arizonensis (Putorius), 224. 
arizonensis (Reithrodontomys), 96. 
arizonensis (Sciurus), 36. 
armata (Loncheres), 170. 
armatus (Loncheres), 169, 170 . 
armatus (Nelornys), 169. 
armatus (Perognathus), 306. 
armatus (Spermophilus), 46. 
artemisiae (Peromyscus), 84. 
artemisiae (vSitomys), 84. 
Artibeus, 288, ^ 89 , 290 . 
Artibeus achradophilus, 291. . 
cinereus, 290. 
coryi, 288. 
intermedius, 289. 
jamaicensis, 288. 
perspicillatus, 289. 
vittatus, 290. 
Artiodactyla, 12. 
N artus (Perognathus), 162. 
arvalis (Mus), 116. 
Arvicola, 124, 304 . 
alticolus, 123. 
amphibius, 124. 
austerus, 128. 
aztecus, 118. 
borealis, 116. 
breweri, 118. 
californica, 120. 
chrotorrhinus, 124. 
curtata, 126. 
curtatus, 126. 
drummondi, 117. 
drummondii, 117. 
edax, 120. 
gapperi, 113. 
haydeni, 128. 
insperatus, 303. 
leucophaeus, 123. 
longicaudus, 122. 
macropus, 125. 
mexicanus, 123. 
microcephalus, 303. 
minor, 129. 
modesta, 117. 
mogollonensis, 123. 
montana, 118. 
mordax, 122. 
nanus, 119. 
nuttalli, 81. 
operarius, 120. 
oregoni, 127. 
Oregon us, 127. 
pallidus, 127. 
pauperrima, 127. 
phaeus, 123. 
pinetorum, 125. 
quasiater, 126. 
richardsoni, 124. 
riparius, 116. 
scalopsoides, 125. 
terraenovae, 118. 
tetramerus, 122, 302 . 
texiana, 91. 
townsendi, 122. 
townsendii, 121. 
trimucronata, 134. 
xanthognatha, 124. 
xanthognathus, 124. 
Arvicolidae, 24. 
