600 REPORT OF THE HARVARD AFRICAN EXPEDITION 
another adult. The young one is dark drab, with a wash of ochraceous. The typl- 
eal race, H. alleni alleni Waterhouse, of the Island of Fernando Po, according to 
Thomas, is very much like stella but differs in slight cranial characters. Since 
the race here described is apparently the Liberian representative of the same 
species, we have used the trinomial for it. At first sight, this short-furred russet 
mouse is very similar to Praomys t. rostratus, but the small, broad foot and more 
delicate form at once distinguish it externally. The two genera, as Thomas sug- 
gests, are doubtless closely related, but Hylomyscus is an arboreal modification, 
while Praomys may be a ground-living offshoot of a similar common stock. An 
adult female has mammae 2—2=8. Ours is apparently the first record of the 
genus from the West Coast forest area. 
Dasymys rufulus Miller. Swamp Rat 
Dasymys rufulus Miller, Proc. Washington Acad. Sci., vol. 2, p. 639, 1900: Mount Coffee, Liberia. 
A medium-sized, shaggy-haired rat, total length about 300 mm., tail about 150; general color 
above wood brown, darkened on dorsal area by black hairs with a slight iridescence; sides paler; 
belly grayish white, slightly washed with buffy, the dark gray bases of the hairs showing through; 
tail with numerous fine hairs about the length of two scales; feet dull gray, the minute hairs shiny. 
At first glimpse this resembles the common Norway Rat, and it may have 
been that Jentink’s inclusion of this species in the list of Liberian mammals was 
a misidentification of a swamp rat. The latter is of about the same size and 
proportions as a small Norway Rat, but is somewhat more shaggy, the ears and 
tail hairier, while the smaller skull is characteristic. Miller described the species 
on the basis of six specimens from Mount Coffee, Liberia, and we secured an 
adult male on the Du River, but did not meet with it elsewhere. It is supposed 
to be swamp-living. No doubt this form will eventually prove to be merely a 
subspecies of some well-known and widely ranging species. 
Leggada musculoides (Temminck). Harvest Mouse 
Mus musculoides Temminck, Esquises Zool. sur la Cote de Guiné, 1853, p. 161: Guinea Coast. 
A small mouse, shorter-tailed than the House Mouse; above mixed tawny and black, resulting 
in yellowish-gray effect, slightly darker in the mid-line of the back; below white to the roots of the 
hairs; length about 135 mm., tail 50, foot 16; mammae 3-2= 10. 
The little Harvest Mouse is readily distinguished from the House Mouse by 
its shorter tail and pure white belly. It seems to be a common species in open 
places, among roots of bushes, grass clumps, or in the rice fields, where it no doubt 
eats a certain amount of grain. We caught a number near a cluster of native 
huts on the edge of a grassy clearing on the Du, and again in the vicinity of 
Gbanga it was common in drier places among weeds and in the fields. One taken 
at the latter locality on September 23 contained five embryos. There seem to be 
no obvious differences between these specimens and others from the Cameroons. 
Biittikofer, who secured specimens at Grand Cape Mount and on the Junk and 
Du rivers, says that they make nests of grass as big as one’s fist, slightly above 
the ground, woven into the surrounding twigs and grass stalks. Those we caught 
were taken among the standing rice or at the entrances to cavities among roots 
