Mr. Koebele returned from Australia in March and came on to Wash- 

 ington for special work, returning to Alameda, Cal., April 15. He 

 spent considerable time in writing out his report on his Australian 

 work (published in Bulletin No. 21 of this Division) and in assisting to 

 rear and distribute the Vedalia. 



During the latter part of the season he did considerable field work 

 and reports upon a number of injurious species. Perhaps the most in- 

 teresting feature in his report is his work upon the enemies of the Cod- 

 ling Moth in California. He has reared four entirely new parasites of 

 this species, two of which are priufary and two secondary. The egg 

 parasite seems to be a very important feature in the life of the Codling 

 Moth on the Pacific coast, and we know from previous experience with 

 egg-parasites of the same genus that they are capable of very rapid 

 development and are consequently very beneficial insects where they 

 attack injurious species. We need only refer to the case mentioned in 

 the Fourth Eeport of the IT. S. Entomological Commission, where 

 by the work of Triclwgramma pretiosa Eiley, the fifth brood of Cotton 

 Worm was almost completely annihilated in Florida, where at the be- 

 ginning of the fourth brood less than one-half of the eggs had been de- 

 stroyed. By almost complete annihilation we mean that less than 10 

 per cent, of the Cotton Worm eggs throughout a large section remained 

 unstung. 



Professor Bruner treats of the insects of the year and enters upon 

 the consideration of insects detrimental to the growth of young trees on 

 tree claims in Nebraska and other portions of the West, an important 

 subject which has not before received treatment. 



C. V. E. 



