7) 
5 
must be one or more additional generations, and there is a possibility 
of at least six in the extreme South. The first generation develops on 
wild plants. 
NATURAL ENEMIES. 
Were it not for certain natural checks this species would be a still 
greater pest than it is. The most important of its insect enemies are 
small parasites, all introductions from Europe. One of them, a Bra- 

Fia. 3.—A panteles glomeratus: a, adult fly; b,cocoon; ©¢, flies escaping from cocoons—4a, b, highly magni- 
fied; c, natural size (original). 
conid, Apanteles giomeratus Linn. (fig. 3), was purposely imported in 
1883 from England. During the autumn of 1904 this species held its 

Fig. 4.—Parasitized cabbage worm (Pontia rapx), showing cocoon mass of A panteles glomeratus below 
(original). 
host under complete control at Washington, D. C., killing every 
“worm” which came under the writer’s observation. A larva which 
has been destroyed by this parasite is shown in figure 4, together with 
the parasite’s cocoons. A secondary parasite, a minute chalcis fly, 
Tetrastichus microgastri Bouché, was also present, but did not militate 
against the effectiveness of the Apanteles. Of similar importance to 
