W. Memmler 1943 Parognathus Californicus June 4, Santiago Springs, 2700 ft., 8 mi. E & 1/2 mi. S Grumler, Sh D Co., Calif. A dense growth of hordeum is 2 1/2 yds. away from the mouth of the burrow in the bottom of the creek bed. The soil is very heavily packed for 3 or 4 inches on top, but is loosely worked beneath. There are many small rocks in the soil. The hole opening to the outside is 22 by 30 mm across, the drop down from the hole to the next level is 80 mm. One small mouse was found in the hole opening to the outside. (That is on the level just beneath the hole.) A second infant came walking out from one of the tunnels as it was excavated, about 6" from the exit hole. A third was found 3 ft from the exit, as was the fourth one. There were ants on two of the young and a tick on one. Two more mice were found. There were 6 in all. Three were alive and three dead. A camel cricket was in one of the tunnels. The nest (of chewed grass stems) was in a spherical cavity 10 cm in diameter. The bottom of this cavity was 50 cm. from the ground surface. June 5, The small mice found in the burrow yesterday were weighed today and they ranged from 4 to 7 grams. The two who survived the night both weighed 7 grams. They were fed about