
Be fa 
Seasonal mortality of California red scale.--F. H. Lathrop, Whit- 
tier, Calif., reporting a series of experiments to determine the mortality 
of red scale on lemon over a 12-month period, July 23, 1930, to August 
fey 1951, says: "With few exceptions, mortality was on the average 
highest in the second instar throughout the year. Mortality was high- 
est for scales set out during the winter months, amounting to almost 100 
per cent for scales set out during November and December. The lowest 
mortality records were obtained during the following months: March, 1931 
(41.8 per cent), July, 1930 (42.2 per cent), August, 1930 (45.5 per cent), 
June, 1951 (55.35 per cent), and August, 1931 (57.0 per cent)." 

JAPANESE AND ASIATIC BEETLES 
Hibernation or diapause believed unnecessary for Asiatic garden 
beetle.--H. C. Hallock, of the Asiatic beetle substation at Westbury, 
Long Island, reports that recent studies indicate that "a rest period, 
such as normally occurs in winter, is not absolutely necessary to the 
complete their development. There is a possibility that there might 
be two generations a year of the Asiatic garden beetle if it should be- 
come established in the vicinity of New Orleans, La., or in other States 
with a similar temperature, provided the soil moisture was also proper 
for the development of the insect.” : , 
Cocooning of Tiphia stimulated by new treatment.--In connection 
with his investigations of the parasite Tiphia popilliavora Rohwer, M. H. 
Brunson, Moorestown, N. J., has devised a new method of handling parasi- 
tized Japanese beetle grubs that has resulted in increased cocoon forma~ 
tion. "Instead of using cross-section trays with individual compart— 
ments 1 inch square, the grubs were placed loose in boxes 15 by le inches 
containing 5 inches of soil with wheat and in cans 6 inches in diameter 
containing 4 inches of soil with wheat. Twenty grubs were placed in 
each container, 160 grubs in boxes and 100 grubs in cans. The con- 
tainers were placed in a cellar at 74° F. After sufficient time had 
elapsed, examinations were made and it was found that 79 per cent of the 
parasitized grubs in the boxes and 60 per cent of the grubs in the 
cans had formed cocoons. As only 34.3 per cent of all the parasitized 
grubs used in propagation in 1931 formed cocoons, the above data are suf- 
ficient to indicate that, despite the cannibalistic tendencies of the 
Japanese beetle grubs, the greatest cocoon formation might come from 
parasitized grubs placed unrestricted in small containers." 
TRUCK CROP AND GARDEN INSECTS 
Puerto Rican mole cricket predatorial and cannibalistic.—W. A. 
Thomas, Chadbourn, N. C3 reports that "The work of dissecting mole- 
cricket (Scipteriscus vicinus Scudd.) stomachs to determine the food 
under natural environment * * * shows that the great bulk of food * * * 
is insects, both dead and living, and other forms of lower animal life. 
There is much evidence now that these insects are cannibalistic * * *. 
Crops examined during the past month have shown a large percentage of 
