Lilleland 1933 Itinerary. 16 July 7. The catch was entirely made up of Microdipodops. Nine were males, seven females. Microdipodops mega cephalus as the species name indicates has an unusually large head, most pronounced being the auditory bullae. Another interesting characteristic is the tail enlarged for support in the center. Late in the afternoon I went with Steve Durrant and Paul T. Wilson into the foothill Region back of the Stone-house. We drove to a point about a mile back of the house. A small creek runs down into the Monitor Valley from this point running just 50 feet from the house in the valley. I set out most of my fifty eight traps around the hillside to the N of the stream. In order to test differences due to presence of succulent grasses I set about 10 traps along the stream. July 8. Results of previous days trapset were:- 16 Peromyscus maniculatus, 2 Peromyscus crinitus, 2 Perognathus parvus, 1 Microtus mordax (by stream), and I shot 1 Sylvilagus idahoensis. The Peromyscus crinitus were taken at the end of a small V shaped wash. Left Stone house at 2:50 pm. Drove to Belmont. Started for Tybo - but confusion in maps and signs resulted in Reconsideration and we ended up at Tonopah at 5:30 We had dinner at Tonopah Club and departed from