510 THE INSECT WOELD. 



the sap flows only with difficulty into the withered organ, and 

 Cannot suffocate the young larvae." 



ScolytuS) Hylesinus, and Bostrichus, which are connected with 

 the weevils, hollow out galleries between the wood and the 

 bark of different trees, when in the larva state, and devour the 

 leaves in the adult state. Fig. 557 represents the Hylesinus pini- 

 perda. The Scolyti are sometimes so numerous in the forests, 

 that the trees are tatooed all over by the larvae. In 1837, they 

 were obliged to cut down, in the Bois de Yincennes, twenty 

 thousand feet of oak trees, aged from thirty to forty years, com- 

 pletely ruined by the ravages of the Scolytus, whose larva is here 

 represented (Fig. 558). The genus Tomicus, hairy, and of a tawny 

 colour, are a terrible plague to pine forests. In 1783, in the 



Fig. 557.- Hylesinus piniperda. Fig. 558. Larva of Scolytus. 



Forest of Hartz, a million and a half of trees were lost by 

 these insects. Often have the priests implored, in the churches, 

 the Divine clemency, to put an end to the devastations made by 

 them. 



We arrive at the tribe of the Longicornes, which contains 

 beautiful insects, of elegant shape and varied colours, sometimes 

 also of rather large dimensions. 



The genus Cerambyx has the antennae very long ; they exceed 

 in some of the species two or three times the length of the body. 

 The larvae are large whitish worms, which live in the wood of trees, 

 the adult insects frequenting flowers, rotten trees, &c. In the 

 month of June, on the Continent, one meets on the oaks with the 

 Great Capicorne (Cerambyx heros, Fig. 559), of a dark brown, 



