Text-fig. 2. 
Forms of lieterochromosomes in various Hemiptera. 1-5. 
Protenor helfragei (from Wilson). (1) Oogonial equa- 
torial plate ; two large lieterochromosomes. (2) Spermatogonial 
equatorial plate ; one large heterocliromosonie. (3) Anaphase, 
second spermatocyte division, side view ; large heterochro- 
mosome below the right pole. (4, 5) Second spermatocyte divi- 
sion, polar view of two daughter-plates ; heterochromosome in 
group 5. 6-9. Euschistus variola rius (from Wilson). 
(6) Oogonial equatorial plate ; no conspicuously small chromo- 
some. (7) Spermatogonial equatorial plate ; one very small 
idiochromosome. (8) Second spermatocyte metaphase ; large 
and small idiochromosomes in centre. (9) Sister groups, 
second spermatocyte division ; small idiochromosome in upper, 
large in lower. 10 (from Wilson). Rocconota annuli- 
cornis, metaphase of second spermatocyte, showing large idio- 
chromosome paired with two small. 11 (from Wilson, after 
Payne) . A c h o 1 1 a m u 1 1 i s p i n o s a , second spermatocyte ana- 
phase, showing large idiochromosome paired with five small. 
