INSECT NOTES FOR IQI2. 447 



Life history. The smaller twigs of maples or other trees are 

 often covered on the underside with cottony masses which pro- 

 trude from under a brownish scale. The female lays her eggs 

 about midsummer, the young emerging from the cottony egg 

 mass, establishing themselves along the veins on the underside 

 of the leaves, or more rarely on the more tender twigs. In the 

 autumn the insects migrate to the twigs before the leaves fall. 

 The males die soon after mating; the females pass the winter 

 on the underside of the twigs, and in the spring increase in size, 

 secrete ^ large amount of honey dew which smears the leaves 

 and everything beneath the infested trees. Later in the spring 

 the insects begin to secrete the cottony matter in which the eggs 

 are deposited. 



The insects are found in many parts of the United States 

 and Canada. On June 27, 1912, specimens of females with the 

 cottony egg mases were received on maple twigs from Mr. 

 J. W. Burke, Lee, Maine. 



The host plants are maple, linden, sycamore, locust, sumac, 

 beech, elm, oak, apple, pear, box elder, alder, hawthorn, grape, 

 willow, and others. 



Remedies. As for the Oyster shell scale. 



TABLE GIVING THE DIFFERENTIAL, CHARACTERS OF THE SCALE 

 INSECTS DESCRIBED IN THE FOREGOING ACCOUNT. 



a. Posterior margin of the abdomen of the female with lobed or 



serrate pygiditim (figs. 475-480) ; legs wanting in the adult, 

 b. Cover scale of female circular, 

 c. Exuviae nearly central. 



d. With circumgenital pores (fig 475). 



Aspidiotus ostreaeformis. 

 dd. Without circumgenital pores (fig 4/6). 



Aspidiotus perniciosus. 



cc. Exuviae nearly marginal (fig. 477). .hilacuspis rosae. 



bb. Female scale elongate or oval. 



c. Female scale rather narrow, often curved (fig. 478). 



Lepidosaphes ulmi. 

 cc. Female scale oval, scarcely twice as long as wide. 



d. Median lobes of pygidium very broadly rounded at the 

 extremities and set close together, (fig. 4/Q). 



Chionaspis fnrfura. 



dd. Median lobes more spreading and indistinctly pointed. 

 (Fig. 480). Chio lias pis lintneri. 



