INJURIOUS INSECTS OF KANSAS. 



goes, but from them come the eggs from which the ravaging 

 larvse issue. 



The next stage is the pupal or chrysalid stage, in which the in- 

 sect lies inactive within a hard protecting shell or case. This 



stage is passed either iu 

 the ground or iu some 

 place of shelter beneath 

 stones, or boards, in crev- 

 ices of bark, or even bur- 

 ied in seeds (as with the 

 Pea- and Bean-weevils), 

 or in the trunks of trees 

 (as with the Apple-tree 

 i Borer). The changing 

 Ti, ^ T^ „r ,^ . ^ ,,. ^ from the larval stage to 



Fig. 4. Fall, Web-wobm Moth, an insect which un- ">'<.vg,^^ mk> 



dergoes "complete metamorphosis; " o, larval form; this QUieSCeut Or DUDal 

 6, pupal form; c, adult or moth form. \ V r 



stage is called -pupation, 

 or, the larva is said to pupate. These terms are frequently used 

 hereafter. During this stage the insect takes no food, but is un- 

 dergoing within its protecting case the marvelous changes in 

 bodily structure which result in 

 the issuance of the beautiful 

 white- and rose-tinted moth, 

 with its four wings and deli- 

 cate sucking tube, from a chrys- 

 alis which was formed by the 

 pupation of the crawling, bit- 

 ing, sluggish, green Maple- 

 worm. 



The fourth stage is that of 

 the adult iii.sect; the one real 

 mission of wliicli is the perpet- 

 uation of the species. As be- 

 fore said, no injury is done by 

 the adult moths and butterflies, nor by the four-winged hymen- 

 opterous insects, (the Raspberry- and Rose-slug Saw-flies,) but 

 many beetles are seriously injurious in the adult stage, as the 

 Cucumber Beetle and others. 



All insects, however, do not undergo such a complete metamor- 

 phosis, and four distinct stages cannot be made out in the lives 



Fig. 5. Maple Wokm; a, adult or moth; 

 6, larva or "worm." 



