cy de 
On August 11 A. 0. Larson, Corvallis, Oreg., met with pea growers 
from Canby, Barlow, and Aurora and discussed pea weevil control. He 
reports: "As a result of the discussion all present voted to burn their 
pea fields and five committees were appointed to secure fire permits and 
burn the pea stubble in their respective sections. It was also voted to 
ask the Horticultural Commissioner to institute proceedings against the 
owners of a 100-acre field of peas which was not being harvested. The 
peas in this field were staked up and wired. Fifteen men were hired to 
pull and burn the peas. The pea stubbles were burned on August 14." 
TOXICOLOGY AND PHYSIOLOGY OF INSECTS 
M. C. Swingle, who has been making a study of synthetic media for 
codling ‘moth ‘larvae at Takoma Park, Md., reports: "The experiment of 
rearing codling moth larvae in an agar wedeanl * * * has been terminated. 
Eight of the 50 larvae confined in the mixture of agar and juice of green 
apples completed their growth by the first week in August. All ihe rest 
died before becoming full grown. The eight larvae died before pupation, 
however, thus indicating that sufficient nutritive requirements are not 
present in the fleshy part of the apples to rear normal larvae. The ex= 
periment will be continued as soon as first-instar larvae are available." 
D. BE. Fink, Takoma Park, Md., reports: "A microsyringe made in this ~ 
laboratory from thermometer tubing with one end ground to fit a No. 27 
Luer sliv needle and mounted on a board having a millimeter scale served 
as the means for accurately measuring or injecting minute amounts cf fluid 
in insects. With this microsyringe it is possible to measure or inject 
0.003 to 0.01 cubic centimeter(of fluid)with a variation of only 0.0003: 
cubic centimeter. * * * By means of this microsyringe definite quan= 
tities of radioactive lead arsenate were injected into the following spe—— 
cies of insects: larvae of Bombyx mori (L.), adults and larvae of Leptino= 
tarsa decemlineata (Say), larvae of Pieris rapae (L.) and Autographa 
brassicae (Riley), and full grown Melanoplus femur—rubrum (DeG.). The 
dosage given varied with the species and was frcem 0.01 to 0.03 cubic- 
centimeter. After 24 hours the injected insects were killed and the tis-= 
sues and organs that were dissected out are shown below (data submitted). 
Each part was charred or ashed and weighed and the radioactive material 
contained in the ash of each part as determined by means of an electro= 
scope by C. Lukens was calculated to per gram weight and served to estab=~ 
lish the relative distribution in an insect of a given dose of the radio= : 
active lead arsenate." 

TAXONOMY OF INSECTS 
L.: L. Buchanan has recently identified specimens cof a European 
weevil (Sitona cylindricollis Fab.) received fromR. F. Copples, Assistant 
Agriculturist, U. S. Morgan Horse Farm, Middlebury, Vt. According to 
Mr. Buchanan, "European literature indicates that this species is not of 
much economic importance in Europe although widely distributed there and 
known vo attack one of the sweet clovers, Melilotus officinalis (L.) Lam." 

