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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- 



mb 



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

 Only one side of the brain is here represented. The numbers indicate the position in the series of 

 84 sections into which this brain was cut. mb, mushroom bodies, with their cellular covering (,<) 

 and their steins (at) ; (t, anterior nervous mass ; m, median nervous mass. After Newton. 



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

 with eyes. 



