20 Proceedings of the Biologirrd- Society of Washington. 
Genpral characters.—Exceeded in size only by Scalopus a. machrinus, 
from whicli it differs also in its more grayish coloration with a greater 
tendency in full pelage towards a silvery sheen. 
Color . — In late winter pelage: upper parts ranging from bister to clove 
brown, becoming paler on face and wrists; underparts slightly paler than 
hack, and usually showing more slate-color of l)ase of hairs, washed 
ventrally with raw umber or mummy brown. 
Meamremenis .—Skull of type: coudylohasal length, B7.1 ; greatest 
length, 1)7.7; palatilar length, 15.5; breadth across mastoids, 19.4; inter- 
orbital constriction, cS.O; maxillary tooth row, 12.1; mandihnlar molar- 
premolar row, 12.0. 
Remarks .—This is the mole of the humid region west of the Mississip])i 
River and north of southern Missouri; it is found as far west as eastern 
Kansas, and the nK)uth of the Sioux River, South Dakota. Its atiinities, 
as have heeji intimated, are with 'machrinus, from which it can he easily 
separated by its smaller size and shorter skull. 
Scalopus aquaticus pulcher suhsp. uov. 
Tjipe, adult S', skin and skull. No. 170,098, U. S. National Museum, 
Biological Survey Collection, from Delight, .Arkansas; collected January 
20, 1911, by ^V. G. Savage. 
General characters .—Size about that of Scalopus a. aquaticus, hind foot 
larger; skull larger than that of aquaticus, Hatter, less swollen snpra- 
orhitally, wider interorhitally; supra()ccii)ital wider than in aquaticus; 
sknll narrower through mastoids than that of 'tnachrinoides, with narrower 
rostrum and smaller teeth. Slightly larger than aereus; skull relatively 
wider interorhitally, through mastoids and through rostrum. Hatter and 
more angular than that of aereus. 
Color . — Full winter pelage: hack dark fuscous with many hairs ti|)ped 
with pearl gray, giving in places a slightly fro.sted appearance; top of 
head mummy brown; nose cinnamon-hrown ; und(u-i)arts sepia, showing 
much blackish j)lumheous of base of hairs. 
Measurements.— measiiK'd in the Hesh: total length, 1H4; tail 
vertel)rre, 25; hind foot, 22. Skull of type: coudylohasal length, 2.5.0; 
greatest length, .85.8; palatilar length, 14.(i; breadth across mastoids, 
17.8; interort)ital constriction, 7.7; maxillary tooth row, 11.1; mandi¬ 
bular molar-premolar row, 10.8. 
Remarks. — 4'his mole is couHiu'd to the humid region of southwestern 
Arkansas, eastern T('\as and western Louisiana, where it appears to he 
locally common. 
Scalopus aquaticus caryi suhs)). uov.* * 
Type, young adult S, skin and skull. No. 11(;,79‘), U. S. National 
Aluseum, Biological Survey Collection, from Neligh, Nebraska; collected 
September 18, IttOI, by Merritt Cary. Original number :5o7. 
General characters.—VuEHt known member of the genus Scalopus ; in 
* Named for Merritl Cary, formerly of tlie U. S. Biological survey. 
