Vegetation used as food, either for immediate consumption or for winter use, includes almost all grasses, vines, shrubs, and trees available near the pika's home. The subalpine lupines are especially favored. Even such a thorny growth as the devil's club (_Oplopanax horridum_) is eaten. Heather (_Phyllodoce, Cassiope_) has not been found in any of the numerous hay piles examined, even when it is the commonest plant in the vicinity. Large bundles of plants are carried in the pika's mouth. The forefeet do not assist in transporting the load. If intended for immediate consumption, the plants are deposited on one of last year's hay piles and are eaten at leisure. The eating habits of the pika are rabbitlike. A large leaf is seized at the tip and drawn into the mouth with rapid chewing motions without assistance from the forefeet. Plants destined to become hay are carefully spread out and exposed to the sun. In cloudy or rainy weather the exposed plants are gathered and stored under large rocks, to be reëxposed for curing when the weather improves. Large hay piles often include more than fifty pounds of perfectly cured grasses, annuals, bushes and evergreens. No record of embryos is available for Washington pikas, but a male with enlarged testes was taken at Lake Keechelus, Kittitas County, on March 22, 1940. Half-grown young of _fenisex_ were taken at Sawtooth Mountain, Skamania County, on July 13, 1939, and of _brunnescens_ at Slate Creek, Whatcom County, on August 16, 1937. Nearly full-grown young of _fenisex_ are reported taken at Bald Mountain, head of Ashnola River, Okanogan County, on September 16, 1920. Young _cuppes_ of several sizes were taken at Sherman Creek Pass, Ferry County, on September 11, 1938. The breeding season possibly extends from March to August with a tendency to be earlier at lower elevations. =Ochotona princeps cuppes= Bangs _Ochotona cuppes_ Bangs, Proc. New England Zoöl. Club, 1:40, June 5, 1899. _Ochotona princeps cuppes_ A. H. Howell, N. Amer. Fauna, 47:27, August 21, 1924. _Type._--Obtained by Allan Brooks at the Monashee Divide, 4,000 feet, Gold Range, British Columbia, on August 2, 1897; type in Museum of Comparative Zoölogy. _Racial characters._--Smallest and palest of the Washington pikas; total length less than 8 inches; color of upper parts grayish-yellow, grayest on posterior third of back; underparts pale buff; skull small, but with relatively wide zygomatic and interorbital regions. _Measurements._--Eight males and 3 females from Round Top Mountain, Pend Oreille County, average, respectively: total length 183.5, 181.5; hind foot 30.7, 31.0; ear 22.4, 23.7; one adult male from the same locality weighed 141.6 grams. _Distribution._--This pika has been found at Round Top Mountain (W.W.D.) and Pass Creek Pass (W.W.D.) in northeastern Washington. =Ochotona princeps fenisex= Osgood