marmota sciuropterus. 121 



Dakota Woodchuck. 



Type locality. Custer, Black Hills, South Dakota. 

 Geogr. Distr. South Dakota. Range unknown. 



239. Marmota engelhardti Allen. 



Marmota engelhardti Allen, Bull. Brookl. Inst. Arts & Scien., i, 

 No. 5, 1905, p. 120. 

 Engelhardt's Woodchuck. 



Type locality. Briggs Meadows, Beaver Range Mountains, Utah. 

 Altitude, 10,000 feet. 



Geogr. Distr. Unknown. 



Genl. Char. Similar to M. flaviventer and M. dakota, but darker 

 in color; palate more produced posteriorly; dentition weaker. 



Color. Side of nose, chin, and anterior part of throat white; 

 top of head black; upper parts, shoulders and thighs, grizzled gray 

 and dusky brown; under fur blackish slate basally, tipped broadly 

 with cinnamon; long hairs black tipped with white; orbital ring, 

 and patch on side of neck, pale rusty yellow; ventral surface deep 

 chestnut, basal third of hairs posteriorly blackish; upper surface of 

 hind feet deep chestnut; tail long, proximal half varied with eray 

 and rusty -tipped hairs; apical half black. 



Measurements. (Dried skin.) Total length, 640; tail vertebrae, 

 160; hind foot, 70. Skull: total length, 74; zygomatic breadth, 48.3; 

 length of nasals, 29; breadth of rostrum in front, 15. 



240. Marmota olympus (Merriam). 



Arctomys olympus Merr., Proc. Acad. Nat. Scien. Phil., 1898, p. 

 352. Elliot, Syn. N. Am. Mamm., F. C. M. Pub., 11, 1901, 

 p. 107. Zool. Ser. 

 Olympic Mountains Woodchuck. 



Type locality. Solduc Trail, timber line, Olympic Mountains, 

 Clallam County, Washington. 



Geogr. Distr. High Mountains, northwestern Washington. 



Subfamily II. Pteromyinse. 



Genus 55. Soiuroptertis. Flyiiij? Squirrels. 



Sciuropterus F. Cuv., Dents Mammif^res, 1825, pp. 161-162, 255, 

 pi. 56. Type Sciurus volans Linnaeus. 



241. Sciuropterus alpinus (Richardson). 



Pteromys alpinus Rich., Zool. Joum., in, 1828, p. 519. 

 Pteromys sahrinus var. /3. alpinus Richard., Faun. Bor. Amer., 

 1, Mamm., 1829, p. 195, pi. 16. 



