112 



INTRODUCTION TO ZOOLOGY. 



ORTHOPTERA.* 



Fig. 94. PlIYLLITJM SlCCIFOLIUM. 



This division includes in it the Cockroaches, Crickets, Grass- 

 hoppers, and Locusts, and those singular-looking creatures, 

 from tropical countries, which have been, by common consent, 

 named "walking-sticks" and "leaf insects." Some of the 

 latter, which we see in our museums, have the wing-covers of 

 so bright and fresh a green, that we can with difficulty per- 

 suade ourselves we are looking on an insect; while others 

 present a no less striking resemblance to the colour of the 

 leaf, and its delicate reticulations, as it lies on the ground in 

 its withered state (Fig. 94). 



Another foreign insect deserves mention, because it has 



* Derived from two Greek words; one signifying straight, the other 

 a wing; the arms being longitudinally folded when at rest. About fifty 

 Irish species. 



