IXSECTS AFFECTING PARK AND WOODLAND TREES 



223 



numbers in an infested orchard near Alban)-. The beetle, in its various 

 stages, is represented in the accompanying figure. It is cpiite convex in 

 shape and only ' ,<, inch lon>;-. The twice stabbed lad\- Ijcetle, C h i 1 o- 

 c o r u s b i \- u 1 n e r u s Muls., is another nati\e form known to feed on this 

 pest. The beetle may be recognized by its jet black color relieved by two 

 red spots on its wing covers. Several lady beetles introduced into California 

 were colonized on trees infested with San Jose scale, and of these, three 

 have since been discovered feeding on the pest. They are Ore us 

 c h a 1 y b e u s, O. a u s t r a 1 a s i a e and S c \- m n u s 1 o p h a n t h a e. 



There is another interesting natural enemy known as the Chinese lady 

 beetle, C h i 1 o c o r u s s i m i 1 i s Rossi, which has been recently introduced 

 by agents of the United States 

 Department of Agriculture, 

 and may prove a valuable ally 

 in controlling this pernicious 

 scale insect, particularly in the 

 Southern States. It closely 

 resembles our native twice 

 stabbed lady^ beetle, C h i 1 o- ^ 

 corns b i V u 1 n e r u s Muls., 

 presenting appreciable differ- 

 ences only in the larval stage. 

 Its general appearance and 

 habits are well shown in 

 figures 38 and 39. Several 

 attempts have been made to J 

 introduce this species in New 



FiS 38 Chinese lady 1 cclle Oiip 

 York State, and while it bred 'hrustmg egg bene.itn scaie; o=sc.iie s,._gn..y r..,>cu >h g .Bg 



underneath; f-sc.ile elevated showinK.nttachmeiit of egg to its inner 

 freely several seasons, it does ^irface; ^-egg within the scale-. ^=egg much enlarged to show 



sculpturing; /=<:g^s under flap of bark; ,f— same, natural size; 

 not appear to have withstood '<• '-dors-il and lateral views of recently hatched larvae; >-same, 



feeding on young and mature scales; all enlarged except g. (After 



our severe winters and it is Mariatt. us. Dep-t Agric. vear Book iqo2> 



very doubtful whether material benefit will result from its presence. It 



