72 
SOME INSECTS INJURIOUS TO TRUCK CROPS. 
Quayle, has added much to the value of the present paper. Although 
the species is much more serious as a pest in British Columbia than 
in the United States, it is likely to become important throughout 
the Pacific coast region where hops are grown. Mr. Eder repre- 
sents the E. Clemens Horst Company, which owns extensive hop- 
yards in British Columbia, and has already expended considerable 
sums in investigation and experiments. The hop flea -beetle is now 
abundant practically on the border line between British Columbia 
and the State of "Washington, and threatens our own industries. It is, 
therefore, advisable that everything possible concerning it should be 
made public before its appearance in the spring, although there are 
several points in its life history still to be worked up. 
DESCRIPTIVE. 
The hop flea-beetle (fig. 12) is a member of the tribe Halticini, 
family Chrysomelidse, and resembles other flea-beetles in its strongly 
Fig. 12. — The hop flea-beetle (Psylliodcs punctulata) : a, Larva; b, lower surface of head 
of same ; c, upper surface of anal segments of same ; d, beetle, a, d, Much enlarged ; 
6, c, more enlarged, (a—e, After Carpenter; d, original.) 
developed hind thighs. It is of oval form, with a greenish tinge, 
brassy blackish, and punctulate or finely punctured, whence its spe- 
cific name. The femora, tarsi, and basal joints of the antennae are 
pale yellowish. The punctulations of the thorax are particularly 
fine and appear as if made with the point of a very fine needle. The 
punctures of the elytral stria? are closely placed, almost crenate. The 
beetle is only about one-tenth of an inch (2 mm ) in length and 
less than l mm in width. The male is particularly distinctive, hav- 
ing the first joint of the anterior tarsi broadly dilated and the last 
