m- 



mx. 



1- 



I- 



ab— 









Pig ao.— a, B, C, D, Stages in Embryonic Development of Grass- 

 hopper " (X/p/uWmm) ; surface views of germ-band or embryo frorn 

 ventral aspect, resting on yolk, pc, head lobes ;e eye; s, mouth 

 [stomodaeum) v, ventral groove ; /feeler -m, mandible ; mx maxilla 

 I labium • I 2, ^, legs ; ab, first abdominal segment ; 7, ». 9. lo. 7tti 

 x'oth Tdiminal^'segm^nts ; .i>, -stigial abdominal appendages ;g^ 

 gonopophyses ; c, cercopods. Magnified. After W. M. Wheeler 

 (jfourn. Morph. viii, 1893). 



