546 



THE STUDY OF INSECTS, 



ruined at the outset. The appearance of these insects 

 when in the ground, as seen through the glass side of one 



of ourroot- 

 cages, is 

 shown in 

 Fig. 657. 

 T here 

 vast 



is a 



number of species of click- 

 beetles ; more than five hun- 



Fig. 659.— Larva of Drasterixis elega7is : 



^ , . , ^ • • „ ^^^, -a;, clypeus ; b, mandible ; <f, maxilla ; d, 



Fig. 657 -a corn-plant growin- m a root- ^^\^r, caudal segment, 



cage mfested by wire-worms and click- & ' > *^ 



beetles (from a specimen in the Cornell •11 



Insectary). The spotted beetle represented (jrcd liaVC been deSCribeCl 



near the base of the plant is Drastenus -xt 1 a • 1 



elegans ; that near the top of the plant is from Nortll America alOnC. 

 Agriotes inancus. 



It is quite difficult to sep- 

 arate the closely-allied species, as there is but little variation 

 in shape and color. The larvae also show comparatively 



