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EDMUND B. WILSON 
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Fig. 9 Comparison of the m-chromosomes in Hemiptera. 
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iF 
tal row are shown at the left a spermatogonial group, in the middle a polar view 
Pachylis gigas. 
of the first spermatocyte-division, at the right a side-view of the same division.) 
a-c, 
(In each horizon- 
Protenor belfragei; d—f, Leptoglossus phyllopus; g-7, Anasa tristis; j-l, 
