Hooper, 1938 Paronysscus maniculatus N side Hoffman Bay, 1/2 mi. N Diller Pt., San Mateo Co., Calif. July 8, 1938 3 in 13 traps set at edge of yellow lupin thicket surrounded by pea (garden) patches; this on S-facing slope. 2 in 16 traps set on same hill but in "graminices" + 1/2 ft. high. 75 set in marshy area (fresh mud) netted nothing. Feathers set 85 in the same marsh but some traps placed next to a sugar beet field and in wild oats; he took 6 of this species. 2 mi. S Sanotoga, 2000 ft., Santa Clara Co., Calif. July 9-11, 1938 1. 6 in 75 traps set in old apple + plum orchard and with grass about 1/2 ft. high. Feathers took 10 in 75 traps set in similar situation. 2. 45 in 110 traps set in old grape orchard with grass 1-2 ft. high. These animals undoubtedly are more abundant where the grass is higher. Also their burrows, or those inhabited by them most often have loose dirt before them. 3 mi. N & summit Mt. Hamilton, Santa Clara Co. July 12, Here in high grass (mostly wild oats) they are the most common kind; not taken in dense brush with P. truei + P. californicus.