el 
Austria. Parasites of the European pine shoot moth received from Aus— 
tria included host material and various stages of 10,307 Hymenoptera 
and 3,023 tachinids, also cultures of a fungus, Beauveria bassiana 
(Bails. Vudie Larval cases of the larch case bearer that yielded 
4,330 Hymenoptera were received from Austria. From host material of 
the oriental moth received from Chosen and Japan, 588 hymenopterous par— 
asites issued. Host material of the elm leaf beetle from which 22,385 
adults of Tetrastichus spp. issued, and 51,790 adults of this beetle, 
supposedly parasitized by the tachinid Erynnia nitida R. D., were also 
received from Europe, as were 196 larvae, pupae, and adults of a pre— 
dacious beetle, Lebia sp. 
Lethal dese of lead arsenate for girsy and satin moths.—-S. F, 
Potts, Melrose Highlands, reports that "The minimum lethal dose for the 
gipsy moth is tentatively set at .08, .10, .12, .15, .18, and {2G aig 
gram of lead arsenate per gram of larvae for the first, second, third, 
fourth, fifth,-land. sixth. instars, -respectively: The minimum lethal 
dose for the satin moth is tentatively set at .235 and .26 milligram per 
gram of larvae for the sixth and seventh instars, respectively. It is 
of interest that the satin moth larvae voided a much greater percentage 
of the arsenical eaten than did those of the gipsy moth. When fed a 
nonfatal arsenical dosage as larvae, the moths from the same contain a 
large portion of the arsenic retained by the larvae. Another portion is 
found in the pupal skin and shell, anda very small portion in the larval 
cast skins." 
Studies of chalcid parasites of birch sawfly.--W. F. Sellers, Buda— 
pest, Hungary, reports that several species of small chalcids, whose par— 
asitization of the birch sawfly leaf miner has been from 10 to 41.81 per 
cent, "kill the larvae before the damage to the individual leaves has 
progressed very far, therefore they would seem to be of the most value 
from an economic standpoint." 
Bird predator on birch sawfly identified.-—-Mr. Sellers also states 
that "a bird that removed Phyllotoma larvae from their mines has been 
determined as Pyrrhula europaea Vieill. The bird was active in the Phyl- 
lotoma infestations about the middle of September, Leaves from which 
larvae had been removed had holes pierced through both sides of the 
Phyllotoma mine, or pieces removed at the margin of the mine." 
Lead arsenate stunts growth of pine seedlings.-—-R. A. St. George, 
Asheville, N. C., reports that "Results of cooperative experiments * * * 
for the control of white grubs in forest nursery seed beds indicate that 
dosages of 1,500 pounds or more of lead arsenate per acre cause a marked 
stunting of the growth of young pines. such growth is checked from 
AO to 50 per cent, depending on the quantity of lead arsenate used 
in the preparation of the beds. The treated beds were almost entirely 
free from grub injury whereas adjacent check plots were damaged consid— 
erably." 
