WEST COAST INSECT NOTES 383 



Tortrix citniiia in Oranges. — We are now receiving at the Pomona Col- 

 lege Biological Laboratory, as we have every year since 1894, oranges in which 

 have burrowed the larvae of this moth. Last season it did great damage 

 in one part of this county. Although the burrow is small, it ruins the fruit. 

 this pest may become as serious to the orange, as the codling moth — a near 

 relative — is to the apple and pear. While Tortrix citrana has worked on the 

 oranges in this county for twenty years, it has usually done but little harm. 

 It is to be hoped that the serious mischief of last year will not be repeated. — 

 A. J. Cook. 



The Yellow vs. Red Scale. — Chrysoniphalus citrintts has usually been 

 regarded as of small importance among the scale pests of orange orchards. 

 It was supposed that a chalcid parasite held it rigorously in check. However, 

 in many sections at the present time, the yellow is hardly less harmful than the 

 red scale. Repeatedly we have brought into the laboratory copious material 

 from various very serious infestations of the yellow scale, without being 

 able to rear from them a single specimen of any chalcid. Its parasite seems 

 to "hold it in check" about as much as the ScutcUista does the black scale — 

 which is not at all. The yellow scale from present evidence, must be placed 

 upon the list of our serious pests, and must be dealt with rigorously wherever 

 its blighting presence becomes apparent. — A. J. Cook. 



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