INSECTS. 



329 



the skin of animals, and these are enveloped by a sheath 

 formed of the jaws and the labra. 



FIG. 287. 



MOUTH PARTS OF COCKROACH (after Sa- 

 vigny). a, labrum; b, mandibles; c, 

 first pair of maxillae, with, d, stipes ; e, 

 lacinia ; /, galea ; g, maxillary palps ; 

 h, submentum of second pair of 

 maxillae or labium; i, mentum; k, 

 labial palps; I, paraglossa ; TO, lacinia ; 

 the last two together forming the 

 ligula. 



MOUTH PARTS OF CABBAGE BUTTER- 

 FLY (after Leuuis). a, suctorial 

 tube, formed from first pair of 

 maxillae ; b, the labial palps, be- 

 longing to the second pair of 

 maxillae. At the base of the 

 former, hints of upper lip, man- 

 dibles, and second maxillae can 

 be seen. 



The coleoptera include the cockchafer, stag-beetle, 

 church-yard beetle, 



Colorado beetle, or FIG. 288. 



potato - bug, fire-fly, 

 glow - worm, lady- 

 bug, meal - bug, 

 water - beetle, can - 

 tharides, and the 

 whole beetle order. 

 The Colorado beetle 

 is too well known by the damage it does the potato 

 crop, and the only protection from it appears to be the 



28* 



COLORADO BEETLE. a, beetle, natural size; 6, 

 caterpillar ; c, eggs. (From Miss Ormerod's 

 " Injurious Insects.") 



