2 mi. S Melba, Canyon Co., Idaho. May 29. The incisors are narrower, and the general coloration is less brownish. I collected several birds at the Bernard ranch: Bullock Oriole, Western Tanager; Cliff Swallow; Violet-green Swallow; Yellow Warbler. It started raining yesterday afternoon (May 29 - written morning of the 30th) and continued all night. Looking the ground to a depth of about 3 inches. We set out no traps on account of the rain. Citellus idahoensis and Marmots are quite abundant here. Three of the latter, 1 ♀ ad with the posterior half of her body devoid of fur, and two younger ones. Six idahoensis were taken. These squirrels are living in single mound burrows on the butte here. Their note is usually a series of a whistled 'lee-lee-lee-lee'. That of leurodon is either a single note uttered at intervals or a low 'whisper' whistle. That of oregonus is a decided loud whistle. The plant association in which idahoensis is living here is mixed Bromia, Atriplex and Artemisia. The soil is clay-sand for the most part.