2l6 NEW YORK STATE MLSELM 



possible that more than one species may have been confused, though 

 Mr Kint,'^ has recently compiled a list of 23 food plants on which this form 

 is sail' to occur. 



Distribution. This species is common over a large proportion of New 

 \'urk -SiatL', and has been recorded from most of the Eastern and some of 

 the Western States, and also from Ontario, Nova Scotia, New Brunswick and 

 Prince lulward Island. 



Natural enemies. One hymenopterous parasite, A bier us clisio- 

 campae Ashm., has been bred from this scale insect by Dr Howard. 

 Two Coccinellids, H y p e r as p i d i u s species and C h i 1 o c o r u s 1) i v u 1- 

 ner u s Muls., the twice stabbed ladybeetle, prey on this pest. The latter 

 is stated to be a specially valuable enemy. 



Remedies. The recommendations for controlling this ir.sect are the 

 sanir as those advised for the oyster scale, to which the reader is referred. 



Bibliography 



1856 Fitch, Asa. Ins. N. Y. 3(1 Rep't, p. 34-35 



1894 Howard, L. O. U. S. Dep't Agric. Year Book, p. 259-6: 



1901 Felt, E. P. X. Y. State Mus. Bui. 46, p. 300-4 



San /ose scale 

 Aspidiotiis pcrniciosiis Comst. 



.\ circular, grayish or yellowish scale insect, al)out Vi'> in<'li ir> diameter, and 

 frequently surrounded by large numbers of much smaller, nearly black scales having a 

 central nipijlc and one or two grayish rings. 



This introduced species has become so well kncnvn to fruit growers 

 that we commonly think of it as depredating almost entirely on fruit trees. 

 Such is not the case as this species occurs on a large number of other trees 

 and may be very abundant on the flowering quince in particular. It also 

 thrives on a ninnljcr of other plants grown in [)arks for ornamental jjurposes 

 and a brief account of this species is therefore included in this work. 



Description. This species is more readily recognized by its effect on 

 the tree or shrub than by the characteristics of the individual. Trees which 

 have been badlv infested for some time have a routdi bark coveretl with 



