200 INSECTS INFESTTNa THE GRAPE. 



They are very destructive to the foliage of fruit trees, grape- 

 vines and nursery stock, and appear to spin more than the red 

 mite. Mr. W. B. AVest, of Stockton, has found them on forest 

 trees. Mr. Williams, of Fresno, reports them on weeds 

 growing on uncultivated land. 



Remedy. — Use No. 34. 



CHAPTER ex VIII. 



The Angular-winged Katydid. (Cal.) 



(Microcentrum retinervis — Burmeister.) 



Order, Okthopteha ; Family, LocusTiDiE. 



[Feeding u[toii the leaves of the orange, apple, cherry 

 and grapevine; a large green grasshopper.] 



The following account of the manner in which this insect 

 deposits her eggs is condensed from the excellent history of 

 this species given bv Professor Riley : 



" Selecting a twig about the size of a common goose-quill, 

 this provident mother prepares it for the reception of her eggs 

 by biting and roughening the bark with her jaws for a distance 

 of two or three inches. When this operation is accomijlished 

 to her satisfaction, she commences at one end of the roughened 

 portion of the twig and, after fretting it anew with lier 

 jaws, and feeling it over and over again with herpalj)! as if 

 to assure herself that all is as it should be, she curls the 

 al)domen under until tlio lower edge of the curved ovijiositor 

 is l)rought between the jaws and palpi, by which it is grasped 

 and guided to the right jiosition. It is then gently worked up 

 and down for from four to .<ix minutes, while a viscid Huid is 

 given out api)arently from tlie ovipositor. Finally the egg 

 gradually rises and adheres to the roughened bark; the insect 

 now rests for a few uiiinitcs, soon to resume her efforts and 

 repeat the like performance in every particular, except that the 

 egg is placed to one side, and a little above the first." 



