206 ZOOLOGY. 



ORDER II. 



HEMIPTERA. 



The individuals of this order are all furnished with wing 

 coTCrs of a softer texture, than those of the preceding ; 

 these covers do not meet in a direct line, as in the Coleop- 

 terae, but the base of the left wing covers the inner margin 

 of the right ; in some, the wings nearly cross at the tips ; 

 the mouth is either situated on the breast, or inclining 

 towards it, 



1. Blatta. Cockroach. Head inflected; antennce seta- 



ceous, and entire ; plate 3, fig. 23 ; or setaceous and 

 jointed, plate 3, fig. 24 ; wings and King-covers flat, 

 smooth, subcoriaceons ; thorax flattish, orbicular, mar- 

 gined ; /eei formed for running; aftc/omera terminating 

 in two or four spines. 



Many of this genus are exceedingly injurious, devouring 

 most kinds of provisions, paper, leather, and vegetable 

 substances ; they are generally nocturnal insects, and 

 are found in great abundance in bake-houses, and other 

 warm places. They are all killed without any external 

 injury, by emersion in boiling water. 



2. Mantis. J/eaJ unsteady ; jmou^A furnished with yara* and 



feelers ; antennce setaceous ; thorax linear ; wings 

 four, membranaceous, convoluted ; the lower pair 

 plaited ; fore-legs compressed, serrated beneath ; 



