Grass Insects 



571 



grain leaves. The eggs are covered with a white substance which 

 fastens them together and folds the edge of the leaf around them. 

 The eggs hatch in from six to ten days. This summer brood of 



Fig. 613. Army-Worm Moths. 



(Knight photo) 



caterpillars is destructive during July. The full grown army- 

 worm (Fig. G14) is about one and one-half inches in length, of a 

 general greenish black color, much lighter below. There are 

 several distinct stripes on each side of the body. The caterpillars 

 of the summer brood become mature the last of July and the first 

 of August and give rise to a fall brood of moths that appear from 

 the middle of August to the last of September. Caterpillars 

 hatching from eggs laid by these moths continue feeding until 



(Knight photo) 



Fig. 614. Army-Worms Showing Color 

 Variations. 



