THE HAMILTON ASSOCIATION. 95 
The most numerous parasite, he says, is Torymus, which is of 
a coppery, brown-greenish color, with a long ovipositor. Fig. 5. 
The next most numerous parasite is the chneumon, Fig. 6, with 
head and thorax black, and abdomen reddish, blackish toward 
the end. 
Another parasite is the Ormyrus, fig. 7, which is uniform black 
color, the thorax punctured and rough, and the abdomen smooth, 
shining and pointed. 
Fic. 6.—ICHNEUMON FLY, FIG. 7- 
Parasite of the Gall Fly. A SPECIES OF ORMYRUS. 
These parasites should be encouraged and by no means 
destroyed, and by their aid this insect will be probaby so kept in 
check as never to become a formidable enemy to the fruit grower. 
In connection with this Raspberry Gall, we may notice another 
Gall not often described in public print. It is the Pithy Gall of the 
pee ePcty) and the producer is a near relative of the Gall Fly. 
| , It is known as Desastrophus 
(| nebulosus. Fig. 8 shows one 
of the Galls which it pro- 
duces on the _ blackberry 
canes. If these are cut open 
transversely, they will be 
found to contain a num- 
ber of oblong cells, each 
about one-eighth of an inch 
long and containing a single 
larva. The perfect insect 
appears in spring and is 
about half an inch long, 
black, with transparent 
IPG, Be 
