NEW YORK STATE MUSEUM 



of the bark. Aside from this, the pest can be spread only by the crawHng 

 young being- carried either by birds, other insects or animals. The first 

 three can hardly be controlled. Great care should be taken during the 

 breeding season not to allow men and teams which have been working 

 among infested trees to go directly to uninfested ones, since the scale is 

 easily conveyed in this manner. 



Distribution. This species has now attained a wide distribution in this 

 countr)- ; though it is still unknown in certain states, and in many is con- 

 fined to more or less restricted localities. It appears to be particularly 

 abundant about some of our larger eastern cities, such as New York. 

 Recent investigations of Dr C. L. Marlatt seem to have established the fact 

 that the original home of this species is in northern China. 



Natural enemies. A number of true parasites have been reared from 

 this scale insect. A n a p h e s gracilis How. was obtained from infested 

 twigs taken in Charles county (Md.) and A s p i d i o t i p h a g u s c i t r i n u s 



Craw, was bred from the San 

 Jose scale in California. A p h e- 

 1 i n u s m \' t i 1 a s p i d i s Le 

 Baron and A. f u s c i p e n n i s 

 How. have been reared from 

 scales taken in a number of 

 localities in Maryland by Prof. 

 W. G. Johnson. The latter 

 species was bred in large num- 

 bers by Prof. Johnson and 

 promises to become an impor- 

 tant aid in controlling this pest. 

 A very small black lady 

 beetle, P e n t i 1 i a m i s e 1 1 a 

 Lee, an American species feed- 

 ing on the San Jose scale, was 

 found bv us in considerable 



Fig. 37. Pent ilia m i ■ 

 som end of pear showi. 

 them, and pupae of Pe 



i; a=beetle; ^=larva; c=pupa; f^=blos- 

 ales with larvae of Pentilia feeding on 

 attached within the calyx, all greatly 



enlarged. (Alter Howard, U. S. Dep't Agric. Di' 



