102 



INSECT LIFE. 



sects 



wings 



FIG. 87. 



4. Make a sketch of a May-fly seen from above. 

 THE STONE-FLIES (Field Work}. Among the in- 

 sects that are common flying about ponds and streams 



are the stone-flies. 

 Fig. 87 represents 

 one of our larger 

 species with the 

 wings of one side 

 spread out. When 

 at rest these in- 

 fold their 

 upon the 

 back, as shown on 

 the left side of the 

 figure. Most of 

 our species are 

 much smaller than 

 the one represented here, but they can be recognized 

 as stone-flies by their resemblance in form to this one. 

 The body is flattened, elongate, and with the sides 

 nearly parallel ; the prothorax is large ; the antennae 

 are long, tapering, and many jointed ; in most species 

 the caudal end of the abdomen is furnished with two 

 slender appendages. Stone-flies are so called because 

 they pass their early stages beneath stones in streams 

 and ponds. 



1. Collect as many kinds of stone-flies as you can, 

 saving several specimens of each kind. 



2. Make notes on their powers of flight. 



3. Make notes on the localities in which they 

 occur. 



4. Try to discover the method in which they lay 

 their eggs. 



