20 



GENERAL ZOOLOGY 



most of them possess wings. The legs are adapted to running. 

 There is no development of strong jumping legs as in the 

 grasshopper and cricket. Their flattened bodies make it 

 easy for them to hide in crevices, whence they come out at 

 night to feed. They usually have a bad odor, and frequent 



Fig. 10. Cockroaches. (Natural size) 



all sorts of filthy places. The female carries her eggs about 

 with her in a large case till the young are nearly ready to 

 appear. Fig. 10 shows the German cockroach, or "Croton 

 bug" (Blatter la german'ica), with its egg case, and a larger 

 species, the so-called Oriental cockroach (Blat'ta orienta'lis), 

 though there is little evidence to show its original home. 



Walking Sticks. The peculiar insects called walking sticks 

 are also related to the grasshoppers. Among them are some of 

 the most remarkable illustrations of protective resemblance 

 known in the animal kingdom. The common species in the 



