MATURATION OF UNFERTILISED EGG IN TENTHREDINIDA. 587 
4. Hicker, Y.—“ U. d. Schicksal d. elterlichen and grosselt. Kernanteile,”’ 
‘Jena Zeitschr.,’ Bd. 37, 1903, p. 297. 
5. Henxine, H.—“ Untersuchungen i. d. Ersten Entwick. i. d. Hier. der 
Insecten,” ‘ Zeitschr. Wiss. Zool.,’ Bd. xlix, 1890, p. 503. 
6. Henxine, H.—‘ Untersuchungen ii. d. Ersten Entwick. i. d. Hier. der 
Insecten,” ibid., Bd. liv, 1892, p. 1. 
7. Jenkinson, J. W.—‘ Maturation and Fertilization of Egg of Axolotl,” 
‘Quar. Journ. Mier, Sci.,’ vol. xlviii, 1904, p. 407. 
8. Monrcomery, T. H., jun.— Observations, etc., on Maturation of Germ 
Cells,” ‘ Biol. Bull.,’ vi, 1904, p. 137. 
9. PetrunKEwitscu, A.—“ Die Richtungskérper und ihr Schicksalim Bien- 
enei,” ‘Zool. Jahrb. (Spengel), Anat. und Ont.,’ xiv, 1901, p. 573. 
10. PetrunKeEwitscu, A.—‘ Die Richtungskérper und ihr Schicksal im Bien- 
enei,” ibid., Bd. xvii, 1908, p. 481. 
11. v. Srezotp, C. T. E.—* Beitrage zur Parthogenesis d. Arthropoden,” 
Leipsig, 1871, p. 106. 
12. Surron, W. 8.—“ Morphology of Chromosome Group in Brachystola 
magna,” ‘ Biol. Bull.,’ iv, 1903, p. 24. 
13. Winson, HE. B.—‘‘ Cytolog. Study of Artificial Parthenogenesis,” ‘Arch. 
Entwickelungsmechanik,’ Bd. xii, 1901, p. 529. 
EXPLANATION OF PLATES 35 & 36, 
Illustrating Mr. L. Doncaster’s paper, “ On the Maturation of 
the Unfertilised Egg, and the Fate of the Polar Bodies, in 
the Tenthredinidz (Sawflies). 
The figures were all drawn with a 2 mm. immersion lens, and in nearly all 
cases a camera lucida was used for the outline. The magnification is about 
x 1000, except in Fig. 5, where it is about x 600. In some of the figures 
two or three successive sections have been combined in one drawing; when 
this has been done it is mentioned in the description of the figure. 
PLATE 35. 
Fig. 1.—N. ribesii. First polar mitosis (combined from two successive 
sections), 
