VI SOME INSECTS INJURIOUS TO TRUCK CROPS. 
conditions. The final article of the series, entitled "The hop flea- 
beetle," has been a subject of study for a number of years. Its 
treatment is monographic to date, and, while some of the data fur- 
nished are preliminary in character, it will constitute a basis for 
future work on the same species. This insect is given the name of 
flea-beetle because of the local name,- "hop flea," used in the hop- 
growing region of the Pacific coast, but it is also a pest in sugar-beet 
fields and in urious to rhubarb, radishes, and other truck crops. In 
the preparation of the article the writer has been fortunate in obtain- 
ing the cooperation of various experts, including, particularly, 
Messrs. H. J. Quayle and Theodor Eder. 
Following this article are a few miscellaneous notes on truck-crop 
insects, the first two giving additional information in regard to the 
principal asparagus pests treated in Part I, the last furnishing addi- 
tional observations on the water-cress insects treated in Part II, with 
notes on the first injurious occurrence of the destructive pea moth 
and of a western root-maggot in the United States. 
F. H. Chittenden. 
