179 
thoracic segment; and on a number of larvee referred to form 2 received 
from J.C. Hostetter in 1883 occurred a number of larve apparently 
identical with the last, all fastened to the under side of the body close to 
the head of the host larva. 
In the article in the Annual Report for 1884, already cited, Mr. Web- 
ster mentions having observed one of these larve (Nematus) with what 
appeared to be a species of Ophion that had just punctured it with its 
ovipositor and remained still attached to it. In the attempt to capture 
them the parasites escaped and the larva fell to the ground and was 
not found. <A larva was found also with the eggs of a dipterous para- 
site fastened to the thoracic segments. 
Remedies.—The fact that these Saw-fly larve pass the winter in the soil 
near their food-plants or in the base of the stalks will insure, in the case 
of wheat and other small grains, the destruction of most of them by fall 
or spring plowing. In the case of timothy and other grasses there is 
opportunity for multiplication of these insects from year to year, and it 
is entirely within the bounds of possibility that they may become abun- 
dant enough to effect considerable damage or to spread in injurious 
numbers to adjacent grain fields. In this event plowing and rotation 
of crops will be the remedy. 
THE IMPORTATION OF A HESSIAN FLY PARASITE FROM EUROPE. 
By S. A. ForRBEs, Champaign, Ill. 
Str: According to my promise I submit the following account of a 
recent experiment, begun at your instance and with material furnished 
by you, for the transfer of a European parasite of the Hessian Fly to the 
United States. 
In accordance with arrangements made by telegraph, I received from 
you May 6 a package of Hessian Fly puparia, said to have been parasi- 
tized by the European species Semiotellus nigripes, and with this pack- 
age a letter from you asking me to take charge of and liberate the 
parasites in an inclosure of infested wheat with an idea of introducing 
the species. A second package came two days later accompanied by a 
letter of advice from your assistant, Mr. Howard. 
_Lhad growing at the time under gauze, but otherwise in the open 
air, a small plot of badly infested wheat 24 by 3 feet, in very fortu- 
nate condition for the experiment. This wheat had been transplanted 
March 26 from a field near Roodhouse, in Morgan County, for use in 
making observations on the life-history of the Hessian Fly, and contained 
when transferred large numbers of the insect in the hibernating pupa- 
rium. Male and female adults had begun to appear in the inclosure by 
April 1, and these transformations continued to May 13, the greater 
number of them occurring about April 20, when, for a few days, more 
