158 



AGRICDLTURAL EXPERIMENT STATION. 

 FIG. 5. 



DESCRIPTION. 



Perfect insect — The female louse is shown much magnified (Fig. 

 0-2.) The real length is about one hundredth of an inch, and they 

 appear to the naked e^'e as mere specks. The male insect and its 

 scale are shown in Fig. 6, much magnified. 



FIG. 6. 



The scales of the male are much smaller than the female scales 

 and occurring more commonly on the leaves, are rarely seen. Eggs 

 from twenty to one hundred are found under each scale. Early in 

 winter they are white but toward the hatching time change to a 

 yellowish hue. Fig. 5, 1, shows the egg much magnified. The 

 eggs remain under the scales unchanged for nearl}' nine months, 

 there being but one brood each season in the Northern States. 



LIFE HISTORY. 



Female. 

 The eggs hatch late in May or early in June. If the weather is 

 cold the lice remain under the scale until warmer weather, and these 

 may be seen running about the twigs for a location to attach them- 

 selves. 



I 



