THE MONTHLY BULLETIN. 



139 



purple to almost black. The lighter body is situated at the small end. 

 The male scales are very much smaller than the female. 



Life History. — The females deposit their white pearly eggs, num- 

 bering from forty-five to a hundred, underneath the scale. The insect 

 occurs in the colder climates and 

 there are usually only two or three 

 broods a year. The winter is spent 

 in the egg state. This species works 

 principally upon the bark, where it 

 collects in great masses. Occasion- 

 ally it attacks the fruits. 



Distribution. — Throughout the 

 apple growing sections and more par- 

 ticularly in the northern part of the 

 State. 



Food Plants. — Apple, plum, pear, 

 quince, maple, cherry, linden, willow, 

 lilac, poplar, hawthorn, buckthorn, 

 raspberry, rose, currant, hop-tree, 

 horse-chestnut, blackberry, cotton- 

 wood, birch, butternut, dog wood, 

 oak, Ailanthus glandulosus, Cean- 

 othvs americanus, Sassafras offici- 

 nale, Syringa persica, Cystisus, tal- 

 low tree. 



Control. — As this species usually 

 occurs on deciduous fruit trees, 

 spraying with lime-sulphur (1-9) 

 during the winter is a very etifective remedy 



Fig. 122. — The oyster shell scale, 

 Lepidosaphes ulmi (Linn.), on apple 

 twig. (Original.) 



THE DATE PALM SCALE. 



Parh/foria hidiichardii (Targ.). 

 (Fig. 123.) 



General Appearance. — The female scales are very small, somewhat 

 elongated in shape, and dark gray or almost lilack with white edges. 

 The body beneath the scale is rose-colored. The male scales are white 

 and considerably smaller than the females. 



Life History. — Like other scales this species collects in great colo- 

 nies, thus working much damage to the host plant. These colonies 

 are most destructive during the summer months as the females are 

 more or less dormant during the winter. Egg-laying begins early in 

 the spring and continues through the early summer at least. Only a 



