120 



THE STUD Y OF INSECTS. 



gus) that damages timothy and June-grass very much by 

 working in the upper joints. In the early summer the dead 

 and yellow heads of grasses thus destroyed may be seen 

 everywhere in grass-growing regions. Some species live 

 under the bark of trees. The accompanying figure repre- 

 sents one of these insects very greatly enlarged (Fig. 137). 



Fig. 137 .— Thrips. 



Fig. 138.— Mouth-parts of Thrips. (Drawn by J. 

 M Stedman, under the author's direction.) 8, 

 labrum; 10, mandible; it, maxilla; 12, labium. 



The insect infesting grapes, called "The Thrips," is 

 not a Thrips at all, but a leaf-hopper belonging to the 

 HomoDtera. 



The name Physopoda is from two Greek words : physao, 

 to blow up, and pons, a foot. It refers to the curious 

 bladder-like feet of these insects. Figure 138 represents the 

 mouth-parts of Thrips. 



