72 



SOME INSECTS INJURIOUS TO TRUCK CROPS. 



Quayle, has added much to the vahie of the present paper. Although 

 the species is much more serious as a pest in British Cohimbia 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 jiublic 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 Chrysomelida.', and resembles other flea-beetles in its strongly 



Fig. 12. — The hop flea-beetle (PsyUiodcs punctulata) : a. Larva; h, lower surface of head 

 of same; Cj, upper surface of anal segments of same; d, beetle, a, d. Much enlarged; 

 h, c, more enlarged, ((i-c. 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 antenna^ 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 striae are closely placed, almost crenate. The 

 beetle is only about one-tenth of an inch (2™'") in length and 

 less than I'"'" in width. The male is particularly distinctive, hav- 

 ing the first joint of the anterior tarsi broadly dilated and the last 



