2 7 6 



ZOOLOGY 



Beetles 



Order Coleoptera 



The beetles, usually easily recognized by the hardened 

 anterior wings, called elytra (singular elytron), which in 



Q/ c 



From Bulletin 67, U. S. National Museum 



FIG. 94. A " ladybird " beetle (Megilla) : a, larva ; b, pupa ; c, adult beetle (enlarged). 

 The figure at the right of the illustration is a rove beetle (Philonthiis), enlarged. 



the majority of species cover the abdomen and conceal 

 the membranous posterior wings. The posterior wings 

 are folded when at rest. The mouth is mandibulate ; 

 that is, adapted for biting, as in the Hymenoptera and 

 Orthoptera. The metamorphosis is complete. The 



antennae usually have ten 

 or eleven joints. 



A small group of minute 

 insects, parasitic on bees 

 and other insects, has been 

 separated as an order Strep- 

 siptera, but it may be con- 

 sidered a suborder of 

 Coleoptera. 



Order Rhynchota (or 

 Hemiptera) 



From Bulletin 6 7 , U. S. National Museum ^ ^ b '^das, 



FIG. 95. A bug, Leptoglossus oppo situs, . 



one of the Hemiptera. plant llCC, Scale inSCCtS, and 



