troublesome as any insect of the season, if we take the number of crops 

 and the area of territory affected into consideration, was the fall army 

 worm. Although properly a field crop insect, it does great damage in 

 vegetable gardens in exceptional seasons like the past, and as at such 

 times it affects a great number of garden crops, it may, for conven- 

 ience, be appropriately considered, with regard to recent injury, in 

 the present bulletin. 



A departure has been made in presenting general accounts of a few 

 species of insects which have not been under personal observation 

 as regards their life history, habits and development. The principal of 

 these are the strawberry crown moth and the black gooseberry borer, 

 both pests of the Pacific States, and restricted to that region. 



For bibliographical purposes it should be stated that, as in the writer's 

 previous bulletins, Nos. 8 and 19, the comprehensive title used for the 

 present publication is assumed as a matter of convenience, and that 

 each article is in a manner complete of itself, having no especial bear- 

 ing on either that which precedes or follows it, and hence each article 

 should be properly indexed separately. 



In conclusion the writer desires to thank those who have cooperated 

 with him in completing the accounts here presented, and desires to 

 acknowledge with gratitude the kindness of his official colleagues and 

 correspondents of this Division for favors which will be duly men- 

 tioned in their appropriate places. 



Of the illustrations here used 16 are original, and of these all except 

 figure 8, which was drawn by Mr. Heidemann, were prepared from 

 drawings made by Miss Sullivan from selected fresh material and under 

 the writer's personal supervision. 



F. H. C. 



