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 our root- 

 cages, is 

 shown in 

 Fig. 657. 



There 

 is a vast 



number of species of click- 

 beetles ; more than five hun- 



FIG. 658. Larva of Cryptohypnus abbre- 

 ti iatus : a, clypeus; d, mandible; c. 

 maxilla ; d, gula; e, caudal segment. 



FIG. 6 59 .-Lar 



FIG. 657 -A corn-plant growing in a root- ^T^^S^SStl 

 cage infested by wire-worms and click- guul r > **" 



beetles (from a specimen in the Cornell ., . 



Insectary). The spotted beetle represented cJred have been described 

 near the base of the plant is Drasterius 



elegans, that near the top of the plant is f rO m North America alOHC. 

 Agr totes mancus. 



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 



