PHYLUM ARTHROPODA 



343 



and flowers, but are not of any economic importance in this 

 country. 



Order 10. Orthoptera. — Cockroaches, Walking-sticks, 

 M axtids, Grasshoppers, Locusts, Katydids, and Crickets 

 (Figs. 269-274). — Insects with four 

 wings ; the fore- wings leathery ; the 

 hind wings folded like a fan; biting 

 mouth-parts ; metamorphosis incom- 

 plete. 



The principal families of Orthop- 

 tera are as follows : 



(1) Blattid^e (Cockroaches, Fig. 

 269). These insects have legs fitted 

 for running. The common American 

 species are the " croton-bug " (Ectobia 

 germanica) which was introduced from 

 Germany, and the "black-beetle" Fig. a6g. — Order Orthop- 



(Periplaneta orientates, Fig. 269) from tera. Cockroach, Periplaneia 



r orientahs. (From Sedgwick s 



Asia 



Zoology.) 



(2) Mantid^e (Praying-Mantis, 



Fig. 270). The fore legs of these insects are fitted for grasping. 

 Their food consists largely of other insects. 



(3) Phasmid^e (Walking-sticks, Fig. 271). The legs of 

 the phasmides are adapted for walking. Walking-sticks feed 

 on foliage and are difficult to distinguish from twigs, hence their 

 name. 



Fig. 270. — Order Orthoptera. Praying-mantis, Phasmomanlis Carolina, 

 (From Davenport, after Packard.) 



