a ks hes 
i year are less resistant than the older larvae by a period of 1 
months. Newly hatched larvae are the least resistant of all stages." 
Life history of P. californicus Mann.—-M. W. Stone, Alhambra, Calif., 
Submits a summary of life-history studies of this wireworm, in which the 
larvae were reared in salve cans at basement temperature. He states that 
"82 of 100 larvae that hatched during the period March 30 to April 5, 
1931, inclusive, have completed their development; 3 pupated in 1931 for 
a one-year cycle and the remaining 79 in 1932 for a two-year cycle." The 
mortality in 1931 was 7 per cent and in 1932, 6 per cent; 5 per cent con-— 
tinuing as larvae to 1933. "It is interesting to note that for the two- 
year group the average number of wheat kernels eaten by the males was 
145.5, over an average larval period of 523.6 days; the females averaged 
153.5 kernels, over an average larval period of 531.7 days; * * * Of 250 
larvae which hatched between March 30 and April 26, 1931, 47 completed 
development in 1931, and 163 this fall (1932) * * * Those completing de- 
velopment in 1931 were fed an average of 7.8 kernels monthly, whereas those 
pupating in 1932 were fed an average of 10.5 kernels monthly from the time 
of hatching until pupation." In this experiment 18.8 per cent completed 
development in 1931 and 65.2 per cent in 1932; the mortality in 1931 was 
5.2 per cent; in 1932, 5.6per cent; and 5.2 per cent continued as larvae 
to 1933. Of 368 larvae hatched during the period May 8 to May 22, 1930, 
inclusive, 201, or 54.6 per cent, completed development in 1931 for a 
two-year cycle, whereas 94, or 25.5 per cent, completed development in 
1932 for a three~year cycle; the mortality in 1930 and 1931 was 15.76 per 
cent and in 1932, 1.08 per cent; 2.98 per cent continued as larvae to 
1933. "An average of 10.4 kernels of wheat per month were fed the lar- 
vae for the 487.2-day (or 16.24-month) period * * * The 94 individuals 
in the three-year cycle were fed an average of 11 kernels monthly for the 
28,12-month period." 
Life history of Melanotus variolatus Lec.--Mr. Stone also reports 
that "Of 30 larvae of M. variolatus that hatched during the period June 
2 to 27, 1931, inclusive, from eggs deposited between May 1 and June 1, 
1931, inclusive, 22, or 73.3 per cent, completed development in 1932; 8, or 
26.6 per cent, died during the experiment, This group of larvae consumed 
an average of 10.9 kernels monthly." 

FOREST INSECTS 
Importations of parasites in 1932.--T. H. Jones, of the gipsy moth 
laboratory, Melrose Highlands, Mass., submits a detailed summary of par- 
asite material received during 1932: Parasites of the gipsy moth from 
European countries included 7,106 Hymenoptera (as cocoons and adults) 
and 42,795 tachinid puparia. As parasites of the brown-tail moth, 458 
puparia of 7 species of tachinids were received. Satin moth parasites 
included 5,762 braconids in cocoons and 2,257 tachinids in puparia. Of 
the birch sawfly leaf miner, 28,587 mines and hibernation cells and 
9,748 mines containing chalcids, 37 mines containing ichneumonines, 
and 1,398 cocoons of Phanomeris phyllotomae Mues. were received from 
