104 APPLE. FRUIT APPLE THRIPS. 



This insect measures only six hundredths of an inch in length and one hundredth 

 in width. It is polished and shining, and of a blackish purple color. Its antennae 

 which are rather longer than the head and composed of eight nearly equal joints, 

 have the third joint of a white color. The ahdomeh is concave on its upper side, 

 and is furnished with a conical tube at its tip which has a few bristles projecting 

 from its apex. The wings when folded are linear, silvery-white, and as long as the 

 abdomen ; they are pressed closely upon the back, spreading asunder at their bases, 

 and appear liKe an elongated white T-shaped mark. Viewed from above, the head 

 is of a square form, longer than wide. The first segment of the thorax is well sepa- 

 rated from the second, is broadest at its base, and gradually tapers to its anterior 

 end, where it is as wide as the head. The following segment is the broadest part of_ 

 the body and square, with its length and breadth equal. 



The insects of this tribe, abroad, are found to be great pests 

 and difficult to exterminate. Dusting the vegetation which they 

 infest with flower of sulphur and washing it ofifa few days after- 

 wards has been found successful in some cases. It is probable 

 that when young and in their larva state they are more tender 

 and more easily destroyed than when mature. But until the his- 

 tory of this species which infests our apples has been more fully 

 observed we shall scarcely be able to decide upon the most judi- 

 cious measures for combatting it. 



