1913 



EXTOMOLOGICAL SOCIETY. 



19 



the petioles and young twigs of its host, Quercus alia, L. In some cases these 

 deformities are decidedly gall-like in character. Sections of these show an enlarge- 

 ment of the cells of the host without proliferation of the tissues. Xot a single 

 specimen of the Coccid {Kermes galliformis, Eiley) was found during the year. 



Fig. 12. — Oyster-shell Scale {Lepidosaphes ulmi) : (a) Adult female, back 

 view, showing the two moulted skins at anterior end, and the 

 bristles of the sucking tube; (b) Adult female, turned over, showing 

 the insect at the anterior end and the eggs at the posterior end; 

 (c) Adult male scale, much smaller than female, with one moulted 

 skin at anterior end. 



The small moth, Euclemensia hassettella, Clemens, appears to be checking the scale 

 in this locality almost to the point of extinction. In former years, an average of 

 about 25% of the specimens were found to be parasitized b}^ this insect. In the 

 apple orchards near the city the Oyster-shell scale (Lepidosaphes ulmi, Linn.) is 



