COLEOPTERA'I CHRYSOMELID.E. 433 



The Genus Saperda contains the Apple-tree Borer, 5. 

 bivittata. Say, which in the beetle state is about three 

 fourths of an inch long, brown above ; and marked with 

 two white longitudinal stripes. It lays Fig. 327.^ 



its eggs on the bark, near the roots of 

 the tree. The larvae are whitish, near- 



App!e-tree Borer, larva, 



ly cylindrical, and tapering from the s. bi-vittata, say. 

 first ring to the hind extremity. The head is small, horny, 

 and of a brown color. Their jaws are strong, and with them 

 they cut a cylindrical passage through Fi g . 32 8 



the bark, pushing their cuttings back- 

 ward, and in the course of the two or 

 three years in which they remain in the 

 larva state, they penetrate eight or ten 

 inches upward into the trunk of the 

 tree, and end their burrow just under Apoie-tree 

 the bark. Here they go through their 

 transformation, which is completed in June, and the bee- 

 tle gnaws through the bark, which is all that covers it. 



The Genus Leptura contains Capricorn beetles which 

 have the body, in most cases, narrowed behind, and the 

 antennae implanted in the middle of the forehead. 



The Genus Desmocerus contains the Cloaked Lepturian, 

 D. palliatus, Harr., which is of a Prussian-blue color, with 

 one half of the fore part of the wing-covers orange yel- 

 low. The larvae live in the lower parts of elder-stems. 



CHRYSOMELID^:, Leach> OR CHRYSOMELA FAMILY. 

 This Family embraces beetles which have a hemispher- 

 ical or ovate form, small and sunken head, and antennae 

 inserted wide apart. They are blue, green, and golden. 



The Genus Lema contains the Three-lined Leaf-Beetle, 

 L. trilineata, Olivier, which is one fourth of an inch long, 

 rusty buff, with two black dots on the thorax, and three 

 black stripes on the wing-covers. Beetles of this species 

 appear in June on the leaves of the potato, gnawing large 

 19 B B 



