CLASSIFICATION OF INSECTS. 77 



and suck their blood. There are several species that 

 infest man. 



Suborder Homoptera (Ho-mop'te-ra). — The Ho- 

 moptera includes insects of widely diversified form, 

 but which agree, however, in 

 having the wings when present 

 of the same thickness through- 

 out, and usually sloping roof-like 

 at the sides of the body when at 

 rest, and in having the beak arise 

 from the hinder part of the lower 

 side of the head (Fig. 59). 



Among the more common 

 representatives of this suborder 

 are the cicadas (Fig.'63) and the 

 spittle-insects and the tree-hop- 

 pers, described in the chapter on 

 Roadside Life. The common F'g- 63.-A cicada. 



plant-lice, or aphids, and the scale-bugs are also 

 members of this suborder. 



Order Neuroptera (Neu-rop'te-ra). 

 The Dobson, Aphis-lions, Ant-lions, and Others. 



The members of this order have four wings ; these 

 are membranous and furnished with numerous veins, and 

 usually with many cross-veins. The head is not pro- 

 longed into a beak. The mouth-parts are formed for 

 biting. The metamorphosis is complete. 



The name of this order is from two Greek words : 

 neuron, a nerve, and pteron, a wing. It refers to the 

 numerous nerves, or veins as they are more com- 

 monly called, with which the wings are furnished. 



When the name Neuroptera was first used it was 



