-~4- 
nent sample plots established in 1931, says: "These plots have been well 
distributed over the States of Ohio and Indiana, and an attempt was 
made to include all age classes and both badly infested and immune plan— 
tations. It appears from the results of these examinations that the 
locust borer shows no definite preference for trees upon which to ovi- 
posit, in any one crown class; 199 dominant trees examined had a total 
of 2,986 larvae, or an average of 15 larvae per tree; 403 codominant 
trees examined had a total of 9,175 larvae, or an average of 23 larvae 
per tree; 556 intermediate trees had a total of 6,093 larvae, or an ay— 
erage of 18 per tree; and 200 overtopped trees had a total of 3,006 
larvae, or an average of 15 larvae per tree." 
Buoyancy of suspended gipsy moth larvae.-—-W. L. Baker, Melrose 
Highlands, Mass., who is engaged in a study of the buoyancy of first— 
instar gipsy moth larvae, says, "from the studies thus far made it is 
seen that such (suspended) larvae are extremely buoyant. When larvae 
are hanging, suspended by a thread of silk, in a 2.5 miles per hour 
breeze, they are blown and held practically parallel with the direc-— 
tion of the current of air. When the larvae are allowed to fall into 
this column of moving air (2-1/2 miles per hour) they fall almost per— 
pendicularly through it. They are deflected from a straight drop by 
not more than 20°. Thus it is seen that even a very short piece of 
silk when attached to a larva adds tremendously to its buoyancy." 
Coccinellid feeds on beech scale.-~-Concerning observations made 
at Manchester, Mass., on June 4, R. C. Brown notes that "adults of 
the coccinellid Chilocorus bivulnerus Muls. were fairly abundant. They 
were feeding on the scale (Cryptococcus fagi Baer. ). Counts on the trunks 
of trees up to 15 feet showed 27, 24, 21, 9, and 6 beetles on five trees. 
Beetles were taken to the laboratory and were found to feed on the scale, 
completely cleaning the bark of this coccid. Larvae of different instars 
of C. bivulnerus were feeding on the scale. Observations made thus far 
on the natural enemies of the scale indicate that C, bivulnerus is the 
only predator that may prove to be important. At Manchester they are, 
however, hardly abundant enough to exert an appreciable controlling ef-— 
Tegu. 
SO Eee eee mse veneestmeremmueesmeneanns amen manatonan, 
Melrose Highlands, reports "the Shipment on June 30 to R. W. E. Tucker, 
Department of Agriculture, Barbados, B. W. I., of 1,500 Compsilura con- 
cinnata puparia obtained from satin moth larvae collected in Taunton, 
Mass. Mr. Tucker requested that puparia of this fly be sent him, with 
the idea that the species might establish itself in Barbados as an enemy 
of certain army worms and cutworms." 
Compsilura concinnata Meig. Shipped to Barbados.——J. A. Millar, 
Burning with fuel oil effective against mountain pine beetle.— 
W. J. Buckhorn and F’. P. Keen, Portland, Oreg., report on a method of 
burning trees with fuel oil, as follows: "First the trees were felled, 
lim>ed, and the slash cleared away from the logs; then a fire was started 
