60 THE BOOK OF EVEEGEEENS. 



of living is very similar to that of the Orthotcenia.resin- 

 ella, of Linnaeus, a European moth, described and figured 

 in London's Arboretum, Vol. IV, page 2146. As no cer- 

 tainty has been arrived at in regard to the correct nomen- 

 clature of this species, we are unable to pronounce it new, 

 although Kollar, Harris, Fitch, etc., evidently do not de- 

 scribe it. In particular seasons and localities they become 

 quite numerous, and large numbers of these resinous balls 

 may be noticed, always on the extreme end of a main 

 branch, or frequently and disastrously on the main shoot 

 of the tree. The eggs are deposited at the base of the 

 bud, and the worm bores downward for some distance in- 

 to the branch. 



These gall-like excrescences are caused by the exuding 

 resin, and often increase to the size of two inches in diameter. 



The moth is usually quite small, of a dull lead color, 

 with broad, entire, fore wings, which form a triangle with 

 the body when at rest, slightly deflexed at the sides and 

 dilated towards the shoulders. 



The only plan to destroy them is to examine these ex- 

 crescences early in the autumn and dislodge the worm, or, 

 if left until spring, the shoot should be cut away and 

 burned. 



Plant-lice. The family of Plant-lice, or Aphidce, are 

 mostly so minute as to be scarcely perceptible to the nak- 

 ed eye, and yet they frequently appear in such immense 

 numbers as to destroy the plants in a short time. These 

 insects cause the foliage on the younger twigs to curl up 

 tightly, and may on this account be very readily detected. 

 Prof. Stauffer, of Lancaster, has detected an undescribed 

 species feeding on the Norway Spruce. Its proboscis is 

 much longer than its body. Another species has lately 

 been found with a shorter proboscis, and differing very es- 

 sentially from the above. A third species, and distinct 

 from both the foregoing, has a woolly appearance, and is 

 found on. the branches . of .evergreens. In England, the 



