Vol. XXVIII, pp. 147-148 September 21, 1915 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DIAGNOSIS OF A NEW SUBSPECIES OF MARMOT FROM 



COLORADO. 



BY J. D. FIGGINS. 



Examination of specimens of Marmola from northern Colo- 

 rado reveals pronounced differences in both color and cranial 

 characters, as compared with Marmota f. luteola Howell and 

 Marmota f. obscura Howell. This subspecific form may be dis- 

 tinguished as follows: 



'e>^ 



Marmota flaviventer campion! subsp. nov. 



Ti^pe specimen, male adult, Colorado Museum Natural History number 

 1235. Locality, detached range between tlie " North Fork" and North 

 Platte River, eight miles north of Higho, Jackson Co., Colo. Collected 

 by H. H. Sheldon, June 19, 1914. 



Characters. — Compared in size, campioni differs very little from either 

 luteola or obscura. In color, campioni is distinct, notably in the pre- 

 ponderance of white on the liead, throat and under parts. Upper parts, 

 including back, sides, outer sides of legs, and two-thirds of tail light 

 cinnamon brown; chin, lips, nose, throat, and fore chest a pure white, 

 whicli blends beneath with the darker color of the belly and disajipears 

 at the base of the tail ; an irregular band of pale vandyke brown across 

 muzzle terminating at anterior corner of eye, adjoined posteriorly by a 

 stripe of ocher yellow which verges into white on the forehead, is inter- 

 rupted at the eye, but continues below in the form of a malar patch to 

 ear. 



Measurements. — Type specimen, total length, 670; tail, 180; hind foot, 

 83. Skull : Zygomatic ])readtli, 55; rostrum, 18; condy]ol)asa] lengtii, 87. 



Skull. — When compared with skulls of obscura and luteola, the .-^kull 

 of campioni more nearly conforms to the latter, tlie chief differences being 

 di.'^tinct compres.sion of bases of pterygoids; larger and more rounded 

 foramen magnum; nasals much flatter anteriorly; distance between 

 postorbital processes of frontal much less; postorbital arch of frontal 

 deeply indented opposite ends of nasals; maxilke shorter; bullaj dis- 



30— Pp.oc. Biol. Soc. Wa.sh., Vol. XXVIII, llJl.'). (147) 



