192 



ylA^ ECONOMIC ENTOMOLOGY. 



The larvae of only a {itvi species are known, and these are pre- 

 daceous. 



Next come the Cleridce, many of which are also flower-beetles, 

 but with longer legs, more prominently enlarged antennae, more 



slender cylindrical form, and much 

 Fig. 177. firmer texture. They are bright 



colored, as a rule, often prettily 

 banded, and sometimes quite abun- 

 dant. Many species are found on 



Fig. 178. 



MaUuhiui marginicollis : much 

 enlarged. 



Clems apivorus. — a, larva ; b, pupa ; 

 beetle central : all enlarged. 



the trunks of trees, running about rapidly and somewhat resem 

 bling ants. Their larvae in such cases prey upon wood-boring 

 insects, principally such as live in sap-wood, and they are slender, 



with short legs and a 

 Fig. 179. prominent, somewhat 



pointed head. They are 

 extremely useful in keep- 

 ing in check bark-beetles 

 and other borers, and are 

 thus worthy of our dis- 

 tinguished consideration. 

 Most of the other species 

 are also predaceous in 

 the larval stage, but 

 hardly beneficial, since they live in the nests of bees, devouring 

 both the larvae and the food stored for them. Clerus apivorus 



Red-legged ham-beetle, Coryiietrs riijipes. — a, 

 larva; d, pupa ; c, cocoon ; d, e, beetle, enlarged 

 and natural size ; /loj, structural details. 



