12 
BULLETIN 1032, U. S. DEPABTMEXT OF AGBICULTUBE. 
ing into the blossoms or berries, as described above; later on, both 
large and small larvae may attack the berries, eating into them 
where the berries touch one another or the leaves or an adjoining 
upright. (See fig. 5.) 
The second generation of worms makes its appearance in consid- 
erable numbers the latter part of July. These larvae not only feed 
upon the foliage, like those of the first generation, but they also web 
it up more, feed longer, and move from place to place much oftener 
than do the larvae of the first generation. Especially on bogs 
Fig. 4. — The blackhead fireworm. Early work of the larva? in the tips : a. Entire new 
tip destroyed ; t, showing how the tip leaves are webbed together ; <?.. an uninjured 
upright. 
making little new growth they may extend their feeding to the old 
foliage, including many of the old uprights in their webs. In 
addition, many of them may also feed extensively throughout the 
remainder of the season on berries of all sizes. It does not seem to 
make much difference whether the berries are webbed up or not ; in 
fact, the majority of the berries attacked are not webbed up at all. 
(See fig. 5.) The injury done by the second generation of larvae is, 
therefore, very striking. The third generation of worms is not very 
distinct from the second and not quite so numerous: but occurring 
