LIFE HISTORY AND CONTROL OF HOP FLEA-BEETLE, a 
the soil, however, until the head, thorax, and elytra have colored, 
The beetle is then of a dull 
which requires from 12 to 14 hours. 
blue-black color, but 
after it has been in 
the sunlight for a few 
days it becomes quite 
bronzy in appearance. 
THE ADULT. 
The adult is a dark, 
smooth, bronzy-black 
beetle of the family 
Chrysomelide, one- 
twelfth to one-tenth 
of an inch (1.5 to 2.5 
mm.) long and about 
half as wide. The 
male and female are 
alike in general ap- 
pearance except as to 
10.—The hop flea-beetle: Adult beetles, showing 
relative sizes of female and male. The male has the 
wing covers slightly spread. Much enlarged. (Original.) 
size, the male being distinctly smaller than the female (see fig. 10). 
The hind thighs, by means of which the beetle jumps, are strongly 
Fig. 11.—The hop flea-beetle : Ovipositor of female. 
magnified. 
developed, hence the 
name “ flea-beetle.” 
The specific name 
punctulata refers to 
the punctulate or 
pitted condition of 
the head, ‘thorax, 
and elytra. This 
beetle should not be 
confused with Z'pi- 
trix subcrinita Lee., 
sometimes collected 
with the hop flea- 
beetle on potatoes, 
which, although 
much like Ps. punc- 
tulata im general 
appearance and in 
the possession of the 
punctulate condition of the thorax and elytra, is smaller and is 
covered with hairs. 
