HESSIAN FLY. 



63 



It appears to me that this is how the matter stands, and that it is 

 the most desirable course by far when we have the germs of a future 

 attack in our power (that is to say, find we have enougli flax-seeds to 

 trouble ourselves about one way or other in our hands), just quietly to 

 destroy them, and so with absolute certainty prevent them being the 

 cause of another attack, which would not be prevented by the presence 

 of the parasites, whatever these might do when the mischief was 

 complete. 



For those who desire the highest entomological opinion on the 

 subject, it may be useful to remark that on this point we have the 

 clearly expressed opinion of Prof. C. V. Riley, Entomologist of the 

 Department of Agriculture of the United States : — " At present, and 

 with general entomological knowledge in its present state, there can 

 be no doubt that it will be advisable to burn, or otherwise destroy 

 screenings, which examination shows to contain puparia. It is a great 

 bother for anyone to breed parasites, and for a practical man it is- out 

 of the question." — (See ' Insect Life,' Periodical Bulletin of the U. S. A. 

 Dept. of Agriculture, March, 1889, p. 294.) 



The Corn attacks of last season have been peculiar, both as to 

 presence and absence, and it maybe conjectured that this latter point, 

 and especially the much lesser amount of inquiry as to infestation in 

 young Corn early in the season, arose from the difficulties in getting 

 the land into cultivation in the preceding autumn. 



CUKKANT. 



Black Currant Gall Mite. Phytoptus riUs, Westwood. 

 (Also CJudcididcE, genus Entedon, in Galls). 



Phytoptus ? 



sp. 



PliytoiHus-iniestei buds ; Phtjtoptus, enormously magnified (life size invisible 

 to the naked eye). 



