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The Bulletin. 



know the trouble ; whereas, if lie had known that he had scale he would 

 have gone ahead with the proper treatments and saved his trees. Fur- 

 thermore, in our inspections we are every year showing the San Jose 

 Scale to the growers in their own orchards, and teaching them how to 

 save the trees if they are really anxious to do so. 



Natural Enemies of the San Jose Scale. — The orchardist is not entirely 

 alone in his efforts to hold the San Jose Scale in check. There are a 

 number of natural enemies which do more or less good in limiting the 

 numbers of the pests. Every rainstorm during the summer doubtless 

 washes off and drowns countless thousands of the young. There are at 

 least two species of native Lady Beetles which commonly prey upon the 



Fig. 5. — Sixth successive crop of peaches in a scale-infested 

 orchard, showing that fruit-growing may be profitably carried 

 on in spite of the San Jos6 Scale. (Photo by Sherman.) 



scale. One of these is the Twice-stabbed Lady Beetle, about one-eighth 

 of an inch long, black, and with a red spot on each wing cover, the spots 

 resembling tiny drops of blood, thus giving rise to its name. The other 

 is called the Pitiful Lady Beetle, though we know not why, unless it be on 

 account of its small size and its jet-black color; it is not as large as a 

 pinhead. 



There are also a number of species of very small four-Avinged parasitic 

 flies, which attack the San Jose Scale. In a recent bulletin* Prof. A. L. 



♦Farmers' Bulletin 650, U. S. Dept. Agr., p. 13. 



