Order HEMIPTERA. 



{Plant-lice, Bugs, " Locusts," ^c.) 



Char. Wings four, anterior pair either of the same 

 thickness throughout, and, usually, sloping at the sides, 

 or thickened at the base, with thinner extremities 

 which overlap on the back. 



Mouth-parts formed for sucking. 



Metamorphosis incomplete. 



This order conl.iins many anomalous forms. So great are the variations 

 that in several instances, groups that are here considered as families have 

 been regarded as orders. Some of these variations will be noticed in the 

 discussion of the different families. 



The Ilemiptera may be divided into two sub-orders, — the Homoptera, 

 and the Meteroptera. These groups are called orders by Westwood and 

 other English writers. 



Suh-Order homoptera. 



Char. Hcmiptera having the anterior wings of the 

 same thickness throughout, and, usually, sloping at the 

 sides. 



Mouth-parts inserted at the posterior and inferior 

 portion of the head. 



We find in this sub order many wingless forms, while some are Dipter- 

 ous. 



The mouth-parts consist, typically, of a short, pointed labrum, and four 

 setiform organs (mandibles and maxillae) enveloped in a long, fleshy, ar- 



