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Show 340 MR. O. THOMAS ON MAMMALS FROM CENTRAL PERU. [Apr. I81 Dr. Winge says of I. hydrobates, that there are "at least one pair on the breast, and two on the belly." Fur short, close, and thick, very similar in texture to that of Holochilus apicalis or squamipes. General colour above mouse-grey, strongly grizzled with fulvous ; upper half of ear-margin brown, lower white. Chin, chest, and belly dirty white, the hairs grey basally, dull white terminally. Upper surface of hands and feet pure white, except that the metacarpals are slightly tinged with brown; cilia of hind feet also pure white. Tail abruptly bicolor, brown above, and pure white below throughout its whole length. Skull apparently quite as in /. hydrobates (see figures 1-4, Plate XXlX.), except that the anterior palatine foramina seem to run further back, ending exactly opposite the most anterior point of m_. Dimensions of the type, an adult female in alcohol:- Head and body 146 m m . ; tail 148 ; hind foot 36; ear, from notch 9*1, breadth 6-2 ; forearm and hand 33*5. Skull-basal length 30-5 ; greatest length 34; greatest breadth 16; nasals, length 11, greatest breadth 4-2 ; intertemporal breadth 5; interparietal length 2*5, breadth 7*1; palate, length 17*3, breadth outside m^ 6-1, inside m^ 3*1; diastema 8*9; palatine foramina, length 6-5 ; length of upper molar series 4*4; hasi-facial length 19; basi-cranial length 11*5; lower jaw, condyle to incisor tips 22. Hab. Chanchamayo. This species differs from /. hydrobates in its rather larger size, its more elongated palatine foramina, and especially in its wholly bicolor tail, that member in the allied form being brown above and below, except just at the tip, which is whitish1. /. hydrobates is a native of the Sierra de Merida, Venezuela, some thirteen or fourteen hundred miles north of the home of I. stolzmanni, but, speaking broadly, upon the same eastern slope of the great Andean chain. I have great pleasure in connecting with this handsome animal the name of Dr. Jean Stolzmann, himself one of the best-known and most successful Peruvian collectors, the discoverer of many new Mammals2, through whose kindness I a m now enabled to describe the present interesting set of mammals. 15. LAGIDIUM PALLIPES, Benn. a. Ad. sk. $ • Incapirca, Zezioro, Junin. 8/5/90. 16. DASYPROCTA VARIEGATA, Tschudi. a-c. Ad. 2 ana* 2 yg. sk. Chanchamayo. 5/9/90. 17. CAVIA CUTLERI, Benn. a. Ad. sk. $ . Incapirca, Zezioro, Junin. 20/6/90. 1 This coloration of the tail is again curiously suggestive of Hydromys. 2 See P. Z. S. 1882, p. 98. |
