20 
BULLETIN 1032, U. S. DEPARTMENT OF AGRICULTURE. 
Because of the overlapping of the generations, one can scarcely do 
more than speculate as to the date of occurrence of the stages of the 
second and third generations on the bogs ; and the latest dates of the 
occurrence, particularly of the moths of the first generation and all 
the stages of the second and third generations, could only be obtained, 
therefore, by rearing methods. 
NATURAL ENEMIES. 
parasites. 
Insects. 
Although numerous very small wasplike insects (members of the 
order Hymenoptera) can be seen flying over the tops of the vines on 
J, S"ZJ 6 3 £ -3 6 %@TK3 6 9 «_& 6 St,sf3 g 
Fig. 
10. — Egg deposition by blackhead fireworm moths of the first generation, 
every three hours from July 15 to 20 ; Seaview, Wash., 191S. 
Records 
badly infested bogs on warm, clear days, none of these could be reared 
from collections of the eggs and larvse of Rhopobota naevaiKt from 
various bogs. Circumstances indicate very strongly, however, that the 
blackhead fireworm on the Pacific coast is parasitized, to a certain ex- 
tent at least, although not as much as on some dry cranberry bogs in 
the East. 
Fungous Disease of the Pup.e. 
From about the beginning or middle of August it is very common 
to find, especially on the older and more badly infested cranberry 
bogs, areas of 3 to 5 inches or more in diameter of old leaves beneath 
the vines which have the appearance of being smeared with a floury- 
white substance. Closer examination of these areas will show that 
this whitish appearance is due to the fruiting growth of a para- 
sitic fungus. which attacks and kills the pupae concealed in their 
cocoons in these old leaves. This fungus is shown growing from the 
• Determined by Dr. A. T. Speare, of the Bureau of Entomology, as a species of Spicaria. 
