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. II. 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. 



