Spe 
Mr. Millar also reports that in 1932 he dissected 1,668 large 
satin moth larvae collected in New England. Of these 78, or 4.6 per cent, 
were parasitized by C. concinnata, and there was only a trace of parasit— 
ization by Apanteles sp. 
Mr. Jones reports that 1,231 pupae of the satin moth were collect— 
ed in 1932 from 23 New England towns and were observed by Mr. Millar. 
The following parasites have issued from this material: 89 C. concinnata, 
4 Tachina mell* Wlk. 4 Phorocera claripennis Macq., 3 Zenillia blanda 
Osten Sacken, 1 Carcelia laxifrons Vill., 1 Sturmia scutellata, 2 unde- 
termined tachinids, 8 Ephialtes conquisitor Say, and a number of Psycho— 
phagus omnivorus Wlk. Psychophagus issued from only one collection and 9 
of the 75 pupae were parasitized by it. 
J. V. Schaffner, jr., assisted by C. L. Griswold, has tabulated the 
He reports: "From the 1931 collections of native larvae, C. concinnata 
was reared from 35 different host species, 6 of which acted as hibernat— 
ing hosts; 9 of the host species are new records for our host listeos 
this parasite; and 2 were new hibernation records. The rearings for 1932 
to date also show 35 different host species, 4 of which are new host rec— 
ords. Since this work was begun in 1915, C. concinnata has been reared 
from 130 native identified host species and from a few other species not 
yet identified." 
Jack Frost most effective control of pine beetles.--An event 
of rare occurrence is reported by J. M. Miller, Berkeley, Calif. On the 
Badger Springs project of the Modoc National Forest cooperative control 
work against the western pine beetle, planned to cover 44,000 acres at a 
cost of $22,000, was started early in December, K. A. Salman and E.. F. 
Wohlentz directing the camp of 70 workers. On December 9 to 11 a cold - 
snap of unusual severity occurred, the temperatures for three consecu— 
tive nights falling below -15° F., and during the day being above zero 
for a few hours only. Samples of bark from the infested trees sent in to 
the Berkeley laboratory on December 27 revealed a mortality of the 
western pine beetle as high as 100 per cent. Dr. Salman and assistants 
then made a thorough check of conditions in the area. Preliminary exam— 
inations in the field indicated a kill approaching 80 per cent of the 
overwintering beetle population, results exceeding any that might be hoped 
for from artificial control. Plans were, therefore, made at once for clos— 
ing down the control work. The extent of the killing, as determined by 
laboratory study of 140 samples, apparently varies according to brood 
Stages and thickness and tightness of bark. Killing of all stages of 
the western pine beetle is found, however, and there is also high mortal— 
ity among the predators, flathead borers, and montain pine beetle broods 
Mr. Miller says that the only other authentic instance of appreciable 
mortality occurred near Bend, Oreg., in 1922, following a cold spell quite 
Similar to that just recorded in northeastern California. 
W. J. Buckhorn and J. A. Beal, Portland, Oreg., report mortalities 
