VI SOME INSECTS INJURIOUS TO TRUCK CROPS. 
Part IV, on the life history and control of the hop flea-beetle 
(Psylliodes punctulata Melsh.), a species injurious to sugar beet and . 
many vegetable crops, as well as hops, is supplementary to an article 
on the same species published as Bulletin 66, Part VI. From the 
standpoint of the occurrence of the insect in British Columbia, where 
the particular observations were made, the insect is treated in detail 
with special reference to all of the remedies which have been sug- 
gested, leaving little remaining to be learned about the species at-the 
present time. 
Part V considers the yellow-bear caterpillar (Diacrisia virginica 
Fab.) in its occurrence in Colorado during 1909. Details of experi- 
ments with remedies are furnished, showing that arsenicals were not 
entirely satisfactory. Additional experiments should be conducted 
when another outbreak of this species occurs. 
The articles which comprise Part VI, namely, ‘‘Notes on the 
Cucumber Beetles” and ‘‘Biologie Notes on Species of Diabrotica 
in Southern Texas,” give information in regard to five hitherto little 
known species of Diabrotica injurious in southern Texas, with obser- 
vations on two common species—the striped cucumber beetle and the 
12-spotted cucumber beetle—in their occurrence in the same region. 
The papers are chiefly devoted to data in regard to injurious occur- 
rences, food plants, feeding habits, life histories, and the second 
includes experiments with remedies, arsenate of lead in combination 
with Bordeaux mixture having furnished good results in the 
treatment of some of these species. 
The bulletin is concluded by Part VII, entitled ‘‘Notes on Various 
Truck-Crop Insects.’’ Under the heading, ‘‘On the Natural Enemies 
of the Colorado Potato Beetle,’ four unrecorded insect enemies are 
treated, a list of wild bird enemies is referred to, the chipping spar- 
row 1s added as a new enemy, and attention is directed to the efficacy 
of the guinea fowl in the destruction of the potato beetle. Notes on 
the potato stalk weevil include a note showing that Trichobaris 
trinotata Say may, at least exceptionally, pass the winter as larva 
or pupa instead of as beetle. Mention is made of three species of 
maggots previously unrecorded as affecting yams. The gregarious 
habit of some common blister beetles is described and mention is 
made of an effective method of destroying them, namely, by dis- 
lodging them from the plants attacked into pails in which kerosene is 
floating on water. 
F. H. CarrrenvDen, 
In Charge of Truck Crop and Stored Product Insect Investigations. 
