118 THE MONTHLY BULLETIN. 



ferns. Works upon the foliage and stems, but is occasionally found 

 upon citrus fruits. 



Control. — Same as for black scale {Saissetia olece). 



Natural Enemies. — The black ladybird beetle, BJiizohius ventralis, 

 the egg parasite, Scutellista cyanea, and the internal parasites, Corny s 

 fusca and Coccophagus lecanii, aid greatly in keeping down the num- 

 bers of this insect. 



THE BLACK SCALE. 



Saissetia olew (Bern.). 

 (Fig. 102.) 



General Appearance. — Black, oval, tough-skinned scales with a dis- 

 tinct "H" on the back of half- and full-grown females. From one 

 eighth to one fourth of an inch in diameter. The young vary from 



Fig. 102. — Full grown specimens of black scale, Saissetia olew (Bern.), 

 at base of nightshade plant. Many of these were under the surface of 

 the soil. (Essig, P. C. Jr. Ent.) 



