49 
NOTES ON (1) THE PERIODICAL CICADA IN WEST VIRGINIA; 
(2) THE HESSIAN FLY; (3) THE GRAPE CURCULIO. 
By A. D. Hopkins, Morgantown, W. Va. 
[| Withdrawn for publication elsewhere. } 
Mr. Ehrhorn wanted to know if the parasite of the Hessian fly was 
abundant in West Virginia, and stated that these parasites did not 
exist in California, and that he desired to obtain some material in the 
hope of establishing it in his section. 
Mr. Hopkins replied that these parasites were very abundant last 
year, but not effective. 
Then Mr. Felt presented the following paper: 
FURTHER NOTES ON CRUDE PETROLEUM AND OTHER INSECT- 
ICIDES. 
By E. P. Fett, Albany, N. Y. 
A preliminary paper on some work along these lines was read by 
the writer at our last meeting and a full account of the experiments 
in 1900 has been presented in his report for that year, and the results 
there set forth need no repetition at this time. No very apparent dif- 
ferences among the trees experimented upon, aside from those 
recorded during 1900, were observable in the spring of 1901. All the 
trees passed the winter about equally well, after making due allow- 
ance for their condition, and though several trees died, it was only 
those which were in a desperate condition the preceding autumn. It 
is rather significant that of the three trees sprayed with undiluted 
kerosene in the spring of 1900, but one was alive a year later, and of 
the four treated with undiluted petroleum, but two were alive, and 
both of these came through the winter with a large proportion (25 to 
50 per cent) of their branches dead. It is but just to add that most 
of these trees, as previously recorded, were at the outset very badly 
infested with San Jose seale. 
The poor results obtained with spring applications of kerosene and 
mechanical emulsions of the same led to the concentration of the work 
on the more promising insecticides, namely, crude petroleum and 
whale-oil soap in various combinations. 
Another test was made with undiluted crude petroleum. Some oil 
was sent me direct from the Frank Oil Company, Titusville, Pa. It 
was a light amber-colored oil, said to test from 44° to 45° on the 
Beaumeé oil scale, and in the field, just before spraying and at a tem- 
perature of about 65° F., it gave a reading of 43.3° Beaumé. Two 
trees were sprayed April 11, 1901, with this oil. The day was bright 
11825—No. 31—01——-4 
