~15— 
bait pails, was done in two vineyards and one fig orchard, using three 
traps in each location. 
Ephestia Sed Ledda Grego. iisdes,4ilis aes 430 
Bplosit Lar lant oldayHbmss oe) tener toe sate. boo aekS 
Ephestia kuehniella Zell. ; :: . Le 
Ephestiodes nigrella Hulst Be .8 3 
Plodia interpunctella Hbn. oo: 1 
Pyralis farinalis L. er 12 
Microbracon hebetor Say (parasite). 99 
Nemeritis canescens Grav. (parasite). 7 
Mesostenus gracilis Cress. (parasite). 51 
Ephialtes exareolata Ashm. (parasite). i 
Celluloid rearing vials prove practicable.--C. H. Donohoe re- 
ports "additional data to show that celluloid rearing vials are more 
favorable than vials of glass. Reared under identical temperatures in 
an incubator on the same foods a small series of larvae in glass re- 
quired an average of 67.6 days for development, whereas a small series 
in celluloid required 60.3 days." 
Activity of pea weevils.--A. 0. Larson, Corvallis, Oreg., re- 
ports: "The first pea weevil eggs were found on May 9 on early peas at 
the experiment station plots. These eggs had been laid on the 8th. On 
the 9th we first observed weevils mating." 
At Moscow, Idaho, according to Tom Brindley, "Weevils were found 
feeding on the pollen of Cogswellia (Cogswellia sp.) and resting among 
the leaves of the Montana pea (Thermopsis montanum) and alfalfa. Dis— 
sections of weevils collected in the field showed well-developed ovar- 
ies, whereas those in hibernation showed little development. One of 
the most interesting observations of the month was the finding of live 
pea weevils overwintering among the debris left on a pea field. Early 
this spring a cage covering 12 square feet of ground was placed in a 
pea field where the peas had been poorly harvested. Eight live wee- 
vils were taken from this cage. This adds another bit of evidence to 
substantiate the fact that the weevils do not have to have trees, posts, 
etc., to pass the winter successfully." 
TOXICOLOGY AND PHYSIOLOGY OF INSECTS 
Successful diet for cockroaches.--M. C. Swingle, Takoma Park, Md., 
reports that "In the eighty feeding experiments now being carried on 
with Periplaneta americana L., only two diets have so far produced ad- 
ults. Five months and 12 days were required to produce adults when 
the roaches were fed on raw steak and tap water. With oatmeal and 
lettuce, 5 months and 15 days were required. The difference between 
these two diets is negligible as far as growth is concerned but it is 
possible that some difference will be noted in egg production." De- 
velopment is progressing under the other diets. 
