Kotford 140 Cynomy s lodoric anus June 15, 1955 Devil's Tower, Wyoming diff. sites, but diff. relative importance differs between sites, & a few only at one site - Sphaeroclea one of most common invaders of mounds, used as old. New pearl lettuce (Canthum) some burrows, Agropyron smithii (= A. arm.) a minor invader mounds. Some plants thick at one mound but little in surrounding area/other mounds (clover, e.g.). Perhaps mound area free of competition!! On S. slope of red bed soil, 10%t slope, Phleum, Sphaeroclea, Bromus, & other invader mounds at burrow entrance Bromus (testrum) sometimes very vigorous so twice size of surrounding plants. Rosa sometimes invader mound area, or persists thin, but hept to 4" height, presumably by action C.l. / I watched one eat leaves of Bromus. Some went thru fairly thick greass about 10" tall, when no trail, but when sit rep hord is above top grass. This sets height tolerated vegetation? At close range I saw one Cytisus 13-15 inistus.//Near road many people fed popcorn, pretzels, shorn cracking peanuts, bananas, etc. to C.l., a few sat from head. Jurs, at burrow sometimes allow approach to about 8', but do not come to hand, C.l. certainly a prime tourist attraction here. Most want to feed C.l. at close range a photograph them. One boy sat on ground feeding pop- corn to 4 within 5' of his feet. Response of C.l. to oat grain not strong - apparently too small to be readily seen. A note there attracts them quickly to that spot.//On 10% S. slope Rosa increases in size or little used mounds; doubtless the C.l. mostly keep it down. Likewise they keep down Artemisia sava, but probably they minimize area over which it grows. At our site at NE end colony, where adjacent range A. arm., Bromus, Sphaer