236 



GLEANINGS FROM NATURE. 



or beneath the bottom rails of old fences. On the first 

 warm days of spring they can be collected by hundreds 

 from any grass-covered hillside having a sunny south- 

 ern exposure. 



A grasshopper has five eyes, three small simple 

 ones, and two large compound ones. Each of the 

 latter is composed of many thousand six-sided facets 

 or parts, in each of which a single filament of the 

 optic nerve ends ; yet it is claimed that with all these 



Tettix arnatus (Say). Paratettix cucnUatns (Burm). Tettigidea lateralis (Say). 

 Fig. 62. Grouse Grasshoppers. (After Lugger.) 



eyes the insect sees but poorly, being guided rather 

 by the sense of smell than by that of sight. There is 

 no nose, the sense of smell being located in the feelers 

 or antennae; while the ears, instead of being in the 

 head, are on the basal ring of the abdomen. Ten 

 small openings on each side of the body lead into 

 tubes which branch and ramify through all its 

 portions. Through these the air passes and comes in 

 contact with the blood vessels which lie alongside of 

 the air tubes in many parts of the body. 



