222 Bugs, Cicadas, Aphids, and Scale-insects 



grown in five days, and the quiescent pseudo-pupal stage lasts four days. 

 The grass-thrips is the cause of the injury or disease of meadow and pasture 

 grasses known as "silver top" or "white top," a common trouble in the 

 northeastern states. The male se.\ seems to be wanting in this species, the 

 young all developing parthenogenetically. 



