INSECT PEST SURVEY BULLETIN 
Vol. 18 
Supplement to Number 1 
March 25, 1938 
ALEALEA 7JEEVIL SURVEY, FALL ' 01 1937' 
Wj _C ■ McDuf f ie, E. V. Liebermah, and R. W. Bunn 
Assistant Entomologists 
D i v ision of Cereal and JGxaige I nsect Investigations- 
Bureau of Entomology and Plant Quarantine 
. U« S. Department of Agriculture 
u 
PURPOSE 0E SURVEY 
■ o! . 
Annual surveys of alfalfa weevil--' abundance in the fall of the 
year were "begun in 1932 in order to indicate the outlook for weevil 
damage in the following year and to create a reliable record of region- 
al abundance which might iater he useful for studying the effects of 
climate upon the weevil. The surveys also reveal the gross abundance 
of cocoons of the larval parasite Ba thyplectes ' c urculionis (Thorns. )3/ 
and, "by dissection, the number of these that are viable. As the sur- 
vey results are of immediate practical value to entomologists and 
county agents in a large part of the weevil- infested region, the poli- 
cy of publishing them was begun with the results of the 193& survey.—' 
-'The work on which this report is based was carried out under 
the direction of J. C. Hamlin. The survey in Jackson County,' Oreg. , 
was planned .and executed by R. C. Newton. General assistance was pro- 
vided by L. J. Jones and J. B. Duncan. 
2/: 
Hypera postica (G-yll. ) . 
All later mention of parasites in this paper has reference to 
this species. 
-AicDuffie, W. C. , Alfalfa Weevil Survey, Pall of 1936. U. S. 
Dept. Agr. , Bur. Snt. and Plant Quar. , Insect Pest Surv. Bui. 17: 
29-^2, March 15, 1937. 
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