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SCHOOL ENTOMOLOGY 



presence may be detected by the mass of gummy, gelatinous 

 material, more or less mixed with soil which exudes from the 

 crown of the injured trees, and by the yellowing of the foliage. 

 The larvae feed upon the soft inner bark of the lower trunk, 

 crown, and adjacent roots, and often so girdle a tree that if 



FIG. 214. Peach tree-borer moths (Sanninoidea exitiosa Say) natural 

 size. The upper one and the one at the right are females, the 

 other two males, (After Slingerland,) 



not treated it will soon die. Such trees are also more sus- 

 ceptible to bark beetles and diseases. 



The adults are clear-winged moths looking very much 

 like wasps. The females are deep steel-blue with a broad 

 orange band across the abdomen, the wings expanding about 

 If inches. The males are smaller and the abdomen is 



