soon spread to all kinds of ornamental plants. Residents of 

 Honolulu of fifteen years ago state that hundreds of trees were 

 destroyed by it and that the trees were white with the insects 

 as if covered with snow. About 1894 the Coecinellid beetle, 

 Cryptolaemits montrouzieri Muls., was introduced by Mr. Koebele 

 from Australia especially to prey on this pest. The ladybird 

 became established and increased steadily. Since that time the 



Fig- 7. — Pseudococcus filamentosus (Ckll.), showing: globular egfgf-sacs clustered on cot- 

 ton stem. (Photograph by author.) 



ravages of Pseudococcus filamentosus have been greatly reduced, 

 although occasionally the balance of nature is disturbed and 

 filamentosus becomes injurious. 



The species is readily recognized by the large clusters of 

 yellow-tinged, globular egg-sacs which it forms on the stems 

 and bolls of cotton. 



Life history. The egg-sac contains several hundred eggs. 



