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TEXT-BOOK OF ENTOMOLOGY 



that these bodies are almost rudimentary in the dragon-flies, whose 

 eyes are so large ; while on the contrary in the blind ants (Typhlo- 



m/b 



mfo 



X 



FIG. 258. Diagrammatic outlines of sections of tho upper part of the brain of a cockroach. 

 Only OIK- side of the brain is here represented. The numbers indicate the position in the series (it 

 :u M-otions into which this brain was cut. mb, mushroom bodies, with their cellular covering (c) 

 and their stems (at) ; a, anterior nervous mass ; m, median nervous mass. After Newton. 



pone), these bodies are as perfect and voluminous as in the ants 

 with eyes. 



