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Later developments in the parasitism of.the pine tip moth (Rya- 
Gionia frustrana Comst.) are reported by L. G.. Baumhofer, pe Nebr.: 
"A check of some 150 cocoons of Campoplex frustranae Cush., collected in 
duly, indicates a small amount of secondary parasitism < on this species 
which was introduced in 1925 for the control of the pine tip moth. A 
_ specimen of Eurytoma tylodermatis Ashm. and of Habrocytus emerged from 
_ these cocoons. Both species were present when the introduction took place 
_ and are themselves ordinarily primary parasites of the tip moth." 
"Examinations, in late August, of young yellow pine in planta— 
tions not treated for grasshoppers give an idea of the amount of damage 
_Gaused by these insects to the remaining trees," says Mr. Baumhofer. 
_ ** * "Out of 500 trees in a 1928 planting, 84 per cent showed evidence 
of grasshopper work; 8 per cent of all trees were completely girdled near 
_ the base, while an additional 20 per cent had growth seriously impaired 
| Or a possibility of dying. In a 1929 plantation, out of 500 trees exam— 
ined, 68 per cent had been fed on by grasshoppers, 4 per cent completely 
_ girdled, and 12 per cent additional seriously injured. Many of the small- 
er trees in the latter plantation were hidden in the grass which probably 
afforded some protection." One application of poisoned bran mash resulted 
ina kill of 62 per cent. 

Mr. Baumhofer also reports areas of discoloration in yellow pine 
_ seed beds in the nursery. "This was found to be due to loss of -chloro~ 
_ phyll, caused by the feeding of a small mite. These mites were numerous in 
all stages and dozens of eggs were counted on a single pine needle. Soon 
after, this same type of injury became apparent over large areas of the 
transplant beds, only western yellow plne being affected. The mites were 
controlled with a l per cent white oil emulsion spray." 
Barly in August T. T. Terrell and four assistants began an in- 
sect survey in the Coeur d'Alene(Idaho) National Forest, for the purpose 
of securing data relative to the results of the 1931 bark beetle control 
Operation and the need for additional control in 1932. Mr. Terrell re- 
ports: "Preliminary results of this survey would seem to indicate that 
in the drainage of the Little North Fork of the Coeur d'Alene River there 
has been a slight increase of approximately 50 per cent over the infesta- 
tion of 1930. This condition can be explained by the fact that only a 
very small portion of this area was covered by control in 19350, and 
though the infestation is still exceedingly light there has been this in- 
crease over last year's infestation. In the Steamboat Creek drainage, 
where a rather thorough second cleanup was made this spring, there has 
been a substantial decrease in the infestation. This project will be 
completed early in October." This forest is the scene of the largest 
bark beetle control project ever conducted. In 1929, $155,000 was spent 
in combating an outbreak of the mountain pine beetle in white pine, and 
in 1930, $50,000 was spent in control work. 
J. M. Miller, Berkeley, Calif., reports: "Life-history records 
(by G. R. Struble and assistants) indicate that the fir engraver (Scoly- 
tus ventralis Lec.) will complete a partial summer generation for 1931, 
as new adults have already emerged from logs attacked early in the summer. 
This rate of development has never been previously observed, and is prob— 
ably due to the unusually high mean temperatures during July." 

