CHROMOSOMES IN COREID HEMIPTERA. IOI 



groups '.iken from embryos at different stages. Fig. 6, 

 a, b, c. (I and e, are from the same embryo early in the formation 

 of tin- hi. 1-1 1 .derm. Fig. 6, f and g, are from another embryo in 

 tlii-~.i; ,e. Fig. 6, h and i, are from an embryo in a slightly 



I.i t IT stage of the blastoderm. Fig. 6, j, is from still another at 

 tin- -.inn- -t.ige as the last, and k from a late blastoderm. Fig. 6, 





1 i,. 7 :s [allfrnatiis. Chromosome-groups of embryonic cells, 16- 



.iin t\po. rf. e. and /. from the same embryo; others from 



/ i- taken from a stage'in which the blastoderm is invaginatin;^ 



to loiin the embryonic fundament and membranes. The 16- 



chronioMniH- Croups are shown in Fig. 7. Fig. 7, a, shows a 



:i|. t.iki-n from tin- interior of an egg in the cleavage stage. 



7, /> .UK! / . .ire from an 'embryo in the early blastoderm stage. 



