184 
J. BRONTfi GrATENBY. 
Bibliography. 
1. Paul Marchal. — “ Reclierches sur la biologie et le developpement 
des Hymenopteres parasites,” ‘Arch, de Zool. Exp.,’ 4 e Serie, 2. 
2. Silvestri, F., 1906-08. — “ Contribuzioni alia conoscenza biologica 
degli Imenotteri parasitici,’ i-iv, * Bollet. Scuola sup. Agric., 
Portici, T. 1 and 3. 
3. Robert W. Hegner.* — “ Studies on Germ Cells : IY, Protoplasmic 
differentiation in the oocytes of certain Hymenoptera,” ‘Journal 
of Morphology,’ vol. xxvi, No. 3. 
3a. ‘ The Germ Cell Cycle in Animals,’ New York, 1914. 
4. Perkins. — “ Tricliogramma evanescens and Pentarthron,” ‘ Trans. 
Ent. Soc.,’ 1913. 
5. Kahle, W. — “ Die Paedogense der Csecidomyiden,” ‘ Zoologica,’ 
1908, Bd. xxi. 
6. Henneguy. — ‘ Les Insectes,’ Paris, 1904. 
7. ‘ The Embryology of the Honey Bee,’ J. A. Nelson, Princeton 
Univ. Press, 1915, p. 72. - 
* After Hegner’s paper (3) a useful bibliography is found. 
EXPLANATION OF PLATES 10, 11, and 12, 
Illustrating Mr. J. Bronte Gatenby's paper on “Triclio- 
gramma evanescens (W.) : a Monembryonic Egg 
Parasite of Donacia Simplex.” 
Lettering. 
ANT. Anterior pole. B. 0. Body cavity. BB. Brain. CAV, 
Developing body cavity. CH. Chorion. CU. Cuticle. D. Dorsal 
surface. D.P. Developing parasite. E. Ectoderm. ECB.N. Ecto- 
dermal nuclei. E. M. Extended mass of cytoplasm and chromatin. 
END.N. Endodermal nuclei. F. Food. F.N. Follicle nuclei; G. 
Stainable granule. G. C. Germ cell. G. C. D. Germ cell determinant. 
G. C. N. Germ cell nucleus. G. C. P. Germ cell pocket. G. L. Gut 
lumen. G. B. C. Minor granule of nucleus. GT. Gut. INV. In- 
vagination. L. Leg of host. L. E. N. Healthy nucleus extruded. 
M. Muscle cells. M. C. Cells of body cavity. M. T. H. Mouth. 
N. Nucleus. N. C. Nerve chord. N. P. Z. Nucleoplasmic zone of 
nucleus. N. S. I. Nuclei sinking inwards (endoderm). (ES. (Esophagus. 
(ES. COM. (Esophageal commissure. OV. Eggs of Donacia. P. Broken 
pieces of germ cell determinant. P. P. Parasite. P. B. 1st polar body. 
