356 
wanted, notch the ends, and tie a string around, as in making a kite; 
or better use stiff wire or a full hoop. Take m anil a or even newspa- 
per, cover all of one side with paste, and cover one section (one-fourth 
of the " dome ") with it, turning all the surplus paper inside. The other 
three sections are covered with paper in the same way, turning the 
surplus paper either inside or outside, as it would naturally go. A 
bundle of rags or cotton can be tied inside where tlie hoops cross to 
receive the charge of bisulphide. Any of the chemical left after treat- 
ing one hill can be carried with little loss to the next. This will make 
a more substantial cover than one would at first think, even when made 
of newspapers, as when dry the paste will make them very stiff, espe- 
cially when there are several thicknesses of paper. The covers will also 
be very resistant to the vapors of the bisulphide of carbon. 
THE IMPORTED PARASITE OF THE HESSIAN ELY. 
Entomologists will have noticed in the last few reports of Professor 
Kiley, as chief of this division, accounts of attempts which he lias 
Fig. 3Q.—E?itedon epigonus Walk.— enlarged (original.) 
made to introduce into this country one of the common European i>ar- 
asites of the Hessian fly, known as Semiotellus nigripes = Untedon 
epigonus Walker. With the assistance of Mr. Fred Enock, of London, 
Professor Eiley several times distributed parasitised flax-seeds of the 
Hessian fly to observers who were favorably located in this country. 
The attempt which gave the best promise of success occurred in 1891, 
when Professor Forbes, of Illinois, received a large number of parasitised 
puparia and distributed them in a field, and later found living speci- 
mens of the parasite. Specimens have been cared for by Professor Cook 
in the vicinity of Agricultural College, Mich. ; by Mr. James Fletcher in 
the vicinity of Ottawa, Canada, and by Professor Forbes in Illinois. 
