12 REPORT OF THE STATE ENTOMOLOGIST I92I 



receiving special attention. There have also been several contribu- 

 tions to our knowledge of gall midges, including one paper on 

 " Indian and Grass Gall Midges," which appeared as a memoir of 

 the Department of Agriculture, India, and a general discussion of 

 "Adaptations among Insects of Field and Forest," which was pub- 

 lished in the August issue of the Scientific Monthly. 



Lectures. The Entomologist has delivered a number of lectures 

 or participated in discussions and conferences on insects, mostly 

 economic species, before various agricultural and horticultural 

 gatherings, some of these being held in cooperation with farmers 

 institutes or county farm bureaus and a considerable proportion, 

 owing to conditions prevailing during the past 3 years, have related 

 to the European corn borer and its control. 



Cooperative work. The Entomologist has continued to cooperate 

 with the Federal Bureau of Entomology as collaborator in Euro- 

 pean corn borer work to the mutual advantage of both interested 

 agencies. He has also cooperated with the Insect Pest Survey, 

 United States Department of Agriculture. This work covers the 

 entire United States, and since it relates to all insects of economic 

 importance, it is broader in scope than most undertakings of this 

 character. It places at the disposal of all official reporters early and 

 accurate information respecting recent developments and thus fre- 

 quently provides warnings of probable outbreaks in addition to 

 disseminating much valuable data. 



Collections. A number of desirable additions to the state ento- 

 mological collections have been made, some of the best material 

 being reared in connection with studies of recent outbreaks or 

 secured as a result of requests for information concerning compara- 

 tively unknown forms. Special attention has been paid to the 

 acquisition and preservation of immature stages, since these are 

 very difficult to obtain ; this is particularly true of a number of borers 

 similar to the European corn borer and found in corn or in the 

 stems of various plants. The special work upon the European corn 

 borer has resulted in numerous, very desirable additions to the 

 state collections. 



Mr Henry Dietrich very generously donated to the Museum 551 

 specimens of California Coleoptera representing 160 species, 55 

 of these being new to the state collections. 



Mr D. B. Young, assistant entomologist, donated from his personal 

 collections Of earlier years a large series of Coleoptera, consisting 

 of over 750 specimens comprising over 400 species previously unrep- 



