Journal 10 mi E, 0.2 mi S Mono City (Jet 395+167), Mono Co., Calif. 6475 ft 22 May at this general vicinity. Total now is 180 traps. 23 May 1230 pm Checked the trap lines and catalogued 8 specimens. Trap results are as follows: Peromyscus maniculatus 5 (released) Eutamias minimus 2 (embryo set, a ♀ dead in trap catalogued), Pereigathus parvus 1 ♂ 1 ♀ (♀ catalogued) M. pallidus 5 ♂ 6 ♀ (one escape; one uncatalogued, ♀ catalogued) 19 No Dipodomys caught today. The lines are located in sparse (10% cover) to moderate (30-40%) cover Artemisia and Chrysothamnus vegetation. Mostly these plants are < 1.5 m tall. On the edges of the dunes which rise 5-10 m. above the flats the vegetation is closer and taller. Microdipodops seem equally scarce in all habitats. Several lines of 20 yielded no animals of any taxon. A number of times, though, I noted what appeared to be microdipodops tracks (tail marks, bathing sign) in front of the traps but no animals caught in any nearby traps. Also, this sign didn't seem to correlate w/ any habitat quality. Persnickety animals I guess. 5/6 ♀♀ were pregnant (including the escapee). One may have been in early pregnancy, though I doubt it. Most of my meager trap success was on the last 2 lines and were it not for this I would have moved camp toward Hawthorne, town of which is the type locality of M. p. pallidus.