ORDER THYSANOPTERA 



89 



In the spring they are found in apple bloom and a large 

 proportion of the blossoms are infested, as high as 80 per 

 cent, in one instance having been observed to be so damaged 

 as to render blossoms infertile. They also occur commonly 



Fig. 48 



Fig. 48. — The pear thrips (Eulhrips pyri) : ovipositor and end of abdo- 

 men from side. Much enlarged. (After Moulton, Bur. Ent., U. S. Dept. Ag.) 



Fig. 49. — The pear thrips (Euthrips pyri): larva. Much enlarged. 

 (After Moulton, Bur. Ent., U. S. Dept. Ag.) 



in strawberry bloom, and the injury to the bloom appears 

 to result in the distortion of the berry known as " buttoning." 

 When exposed they can be killed by spraying with kerosene 

 emulsion. 



