THE SAN JOSE SCALE 



295 



recently been reported to me by Mr. Sirrine, as observed by him 

 on Long Island. 



The following is the list as it now stands. It will doubtless be 

 largely extended by future observations : 



TiliacecQ 

 Linden {Tilia). 



Celastracem 

 Euonymus. 



Zeguminosm 



Acacia. 



Rosacem 



Almond. 



Peach. 



Apricot, 



Plum. 



Cherry. 



Spiraea. 



Raspberry. 



Rose. 



Hawthorn {Cratcegui), 



Cotoneaster. 



Pear. 



Apple. 



Quince. 



Flowering Quince. 



Saxifragacm 

 Gooseberry. 

 Currant. 

 Flowering Currant. 



Ehenacem 

 Persimmon (Diospyros), 



Urticacm 

 Elm. 

 Osage Orange 



Jkiglandaceos 



Tai 

 Pecan Nut. 



English "Walnut. 



Betulacem 

 Alder? (Alnus). 



Salicaeem 

 Weeping Willow. 

 Laurel-leaved Willow (from 

 Asia). 



It will be seen from the above that the scale is recorded as occur- 

 ring on plants in ten of the Orders, although one-half of the food- 

 plants named belong to the Order of Rosacem. 



Spread of the Insect 



The natural spread of this scale is not a rapid one. As the female 

 is unprovided with wings, and is unable to change its position after 

 having become fixed and throughout its entire period of reproduc- 

 tion, the insect can only pass from one tree to another during the 

 few hours that it continues in its active larval stage. Although a 

 rather rapid traveler its range of locomotion would hardly ever carry 

 it to neighboring trees in an orchard, unless the branches should 



