Lee Arnold 1937 Itinerary May 25 Warm Spring, 4000ft, 9 mi. E of Medee, Lassen Co., Calif. cottonwoods. On closer observation I discovered a nest in the top branches of the tree. There are quite a number of large hawks in this area. Those identified included Rough-leg Hawks, Red-tailed Hawks, Prairie Falcon (?), and several other broad-winged hawks (probably Swainson). The limiting factor on the abundance of these birds seems to be the presence of suitable roosting and nesting sites. Almost every tree of any size seems to be occupied by these birds at night. I have noted several Bullock Oriole nests? Say Phoebe nests in this area. In one case, an old barn 4½ Mi. WNW of Stacy we found young Say Phoebes about ½ grown. Barn Swallows and Cliff Swallows seem to be fairly common in this area. Several of these are nesting around the buildings at Warm Spring. Last night we set out traps 4½ Mi. WNW of Stacy, Lassen Co., Nevada. I set out 60 traps. The first 30 were in salt bush surrounding an old deserted farm. The last 30 were set some 500 yards east of here in a more sandy spot where the salt bush was more sparing. In the traps set around the farmhouse I caught 9 specimens. They are as follows: Dipodomys (ordii?) + (2♂; 2♀) (1♀) Dipodomys merriami 4 (2♂; 2♀) Peromyscus maniculatus 1 (♂) Perognathus 3 (1♂; 2♀) In the area east of the farm I caught: Dipodomys (Ordii?) 3 (2♀; 1♂)