
ee 
E. Dudley, jr., says: "Of the two hundred and odd alfalfa plants used in 
these experiments, three have been discovered which apparently are toxic 
to aphids, or at least upon which aphids refuse to feed. Hundreds of 
aphids, both young and adult, have been placed on two of these plants over 
a period of a month, and in all cases they have been found dead in from 
1 day to 5 days. There is no apparent outward condition that would dif— 
ferentiate these plants from any others but they will not support aphids. 
They are to be propagated and the increased plants, if still resistant 
to aphid attack, will be analyzed for nutritive value as hay." 
Survival of Mexican bean beetle.--H. C. Mason, who is engaged 
in bean insect investigations at Columbus, Ohio, gives the percentage 
of survival of Epilachna corrupta Muls. "as obtained from hibernation 
cages at Athens, Ohio, Columbus, Ohio, and Arlington Farm, Virginia." 
The minimum emergence was 15.60 per cent at Columbus; at Athens the maxi- 
mum emergence was 32.11 per cent; while at Arlington, Va., the emergence 
was 43.83 per cent, the peak of emergence being on June 13 at that place. 
Coccinellids destroy eggs of bean beetle.--Neale F. Howard, Col- 
umbus, Ohio, reports that "Notwithstanding the largest population of 
adults that has probably occurred in southern Ohio for many years, the 
beetle has not reproduced as rapidly as was expected. * * * The reason 
for the lighter larval infestation than the number of adults present 
would indicate is owing, partially at least, to the feeding on the eggs 
by native coccinellids, chiefly Csratomegilla fuscilabris (Muls.) and 
Hippodamia convergens Guer. Field counts show that approximately 14 
per cent of the eggs gave evidence of having been chewed by a coccinel- 
ana it 
Activity of bean stalk weevil.--J. R. Douglass, Estancia, N. Mex., 
reports that Sternus paludatus (Casey) "is more abundant and destruc— 
tive in the foothill canyon fields than heretofore. * * *, Emergence 
from hibernation was concluded on June 11, with the following results:" 
Emergence from oak leaves and pine needles, associated with pine, 28.9 
to 44.3 per cent; from pinon and cedar needles, associated with pinon- 
juniper, 27.6 per cent; and from oak leaves and pine needles, associ- 
ated with short-grass or semidesert, 60.4 per cent. 
FOREST INSECTS 
Early in June the forest insects laboratory located at Amherst, 
Mass., was moved with the Northeastern Forest Experiment Station to 
335 Prospect Street, New Haven, Conn. 
Locust borer shows no crown-class preference for oviposition.—— 
Ralph C. Hall, Columbus, Ohio, repor:ing on a reexamination of perma- 
