_Remarks_.--Howell (1914:51) made _R. inexspectatus_ Elliot a synonym of _R. f. toltecus_ and perhaps we should follow him in this. The facts are that in our large series from the vicinity of Pátzcuaro, the upper parts are more reddish than in _R. f. toltecus_ from the valley of México, and more reddish than in _R. f. tenuis_ if we correctly interpret Howell's (_op. cit._,:45) description of _R. f. tenuis_. In the color of the underparts the series is, to us, indistinguishable from topotypical _toltecus_ and therefore has more reddish underparts than _R. f. tenuis_, as we know _R. f. tenuis_, from Howell's (_loc. cit._) description. In size, the series from Pátzcuaro is intermediate between _R. f. tenuis_ and _R. f. toltecus_ but nearer the latter. =Reithrodontomys chrysopsis chrysopsis= Merriam Volcano Harvest Mouse; Spanish, Ratón Dorado _Reithrodontomys chrysopsis_ Merriam, Proc. Biol. Soc. Washington, 13:152, June 13, 1900, type from Mount Popocatepetl, México. _Reithrodontomys chrysopsis chrysopsis_, Howell, N. Amer. Fauna, 36:66, June 5, 1914. _Range._--Patambán, 1,200 feet elevation as now known. _Remarks._--Howell (1914:68) lists nine specimens from Patambán. We have not examined these specimens. He listed at the same time seven of the specimens from Tancítaro, but we have found specimens from Tancítaro to be of another subspecies, _R. c. seclusus_. Accordingly, we are in doubt as to whether the mice from Patambán are subspecies _chrysopsis_, _seclusus_, or an unnamed subspecies and our use here of the name _Reithrodontomys chrysopsis chrysopsis_ for them is, of course, provisional. =Reithrodontomys chrysopsis seclusus= Hall and Villa Volcano Harvest Mouse; Spanish, Ratón Dorado _Reithrodontomys chrysopsis seclusus_ Hall and Villa, Proc. Biol. Soc. Washington, 62: 163, August 23, 1949, type from Mount Tancítaro, 7,800 ft., Michoacán. _Reithrodontomys chrysopsis chrysopsis_, Howell, N. Amer. Fauna, 36:66, June 5, 1914, part. _Range._--Known only from Mount Tancítaro, from 6,000 feet elevation up to at least 11,000 feet. _Specimens examined_, 22: nos. 51407-51411, 52110-52126, all from Mount Tancítaro, distributed by altitude as follows: 6,000 ft., 5; 7,800 ft., 10; 10,500 ft., 1; 11,000 ft., 1; no altitude recorded, 5.