MATURATION OF UNFERTILISED EGG IN TENTHREDINID®. 559 
Fie. 22.—C. varus. Two inner polar nuclei. 
Fie. 23, a and 6.—a. Resolution into chromosomes of inner polar nucleus. 
b. Later stage; splitting of the chromosomes. 
Fie. 24.—N,. ribesii.—Transverse section of first polar spindle, showing 
chromosomes. 
Fic. 25, a and 6.—N. ribesii. Transverse section of second polar spindle, 
showing eight chromosomes travelling to each end. The two groups were 
superposed in the same section, showing sixteen chromosomes at slightly 
different levels. 
Fic. 26.—N. ribesii. Transverse section of somatic mitosis in yolk, 
showing chromosomes. 
Fie. 27.—P. luteolum. Transverse section of second polar spindle. 
Fie. 28.—P. luteolum. ‘Transverse section of mitosis in blastoderm, 
showing chromosomes travelling to each end. 
Fig. 29.—P. luteolum. First polar mitosis. 
Fic. 30.—P. luteolum. Mitosis in blastoderm. The section is not 
stained deeply enough to show centrosomes. 
Fic. 31.—P. luteolum. Mitosis in yolk, showing centrosomes. 
Fie. 82.—N. ribesii. Mitosis in yoik, showing centrosomes. 
