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from one-third, to a little no.ro than one-half grown. Alfalfa fields 
adjacent to the San Francisco Bay surveyed on March 18, and larval 
counts ranged from 20 to 240. No danger of a bu'ild-up in the population 
in this region. Extremely scarce in the fields around Pleasanton on 
the same date. Based on rearing records of larvae collected on March 4 
in the San Joaquin Valley, it was found that about 25 percent of the 
last-instar larvae wore parasitized by Bathyplectes cur culionis Thoms. 
In the San Francisco Bay region it was found that better than 85 percent 
of the larvae collected on March 5 had been parasitized by Bathyplectes . 
Population about Pleasanton too small to determine with accuracy the 
degree of parasitization; however, on March 18 the only 2 large larvae 
collected were both parasitized. Bathyplectes is apparently an impor- 
tant factor in holding the larval population in check in the region 
adjacent to San Francisco Bay and at Pleasanton. 
CLOVER LEAF WEEVIL ( Hypora punctata F. ) 
Georgia. T. L. Bissell (March 25): Grubs plentiful on alfalfa at 
Experiment, central Georgia. 
CLOVER ROOT CURCULIO ( Sitona hispidula F. ) 
Georgia. T. L. Bissell (March 25): Adults present on alfalfa at Experiment. 
ALFALFA CATERPILLAR ( Colias eurytheme Bdv.) 
Louisiana. C. 0. Eddy (March 26): Active in alfalfa fields. 
California. A. E. Michelbacher (March 19): Throughout the fields surveyed, 
in the northwestern part of the San Joaquin Valley, the. region adjacent 
to San Francisco Bay, and at Plc.asanton, larvae have been scarce. Num- 
bers collected per 100 sweeps for the different fields have ranged from 
0 to 3, seldom more than 1. Occasionally a larva is found parasitized 
by Apantcles f laviconchac Riley. 
GREEN CLOVER WORM ( Plathypona scabra F. ) 
Louisiana. C. 0. Eddy (March 26): Active in alfalfa fields. 
THREE-CORNERED ALFALFA HOPPER ( Stictoccphala f cstina Say) 
Louisiana. C. 0. Eddy (March 26): Adults are being observed on alfalfa. 
PEA APHID ( Hacrosiphum fdsi Fltb. ) 
Georgia. T; L. Bissell (March 25):’ Found in small numbers on alfalfa at 
Experiment, but none on Austrian peas. 
California. S. Lockwood (March 23): Present in alfalfa in Imperial 
County in relatively small numbers for this time of the year. 
LIBRARY 
STATE PLANT BOARD 
