. Transactions of the Entomological Society of London. E. A. Cockayne, del. Diagram of ventral view of external genitalia of gynandromorphousEronia hippia var. gaea. Trans. Ent. Soc. Lond., ipi6, Plate E. A. Cockayne, del. Bursa copulatrix and ostium bursae of (I) normal female,(II) gynandromorphus Eronia hippia var. gaea. Gynandramorphous Lepidoptera. 320 to von EngelhardfcJ who has described and figured them,show a condition opposite to that met with in the Euggynandromorphs. Morgans third and most important contribution to thissubject, Mosaics and Gynandromorphs in Drosophila,was made
. Transactions of the Entomological Society of London. E. A. Cockayne, del. Diagram of ventral view of external genitalia of gynandromorphousEronia hippia var. gaea. Trans. Ent. Soc. Lond., ipi6, Plate E. A. Cockayne, del. Bursa copulatrix and ostium bursae of (I) normal female,(II) gynandromorphus Eronia hippia var. gaea. Gynandramorphous Lepidoptera. 320 to von EngelhardfcJ who has described and figured them,show a condition opposite to that met with in the Euggynandromorphs. Morgans third and most important contribution to thissubject, Mosaics and Gynandromorphs in Drosophila,was made in L914, and gives an account of those whichappeared in his mutant slocks of the fruit fly. In some ofilicni the male side or male portions showed maternal characters, in o! hers paternal ;i,nd in others both maternal and paternal characters. The first group would lit in withBoveris theory, the second with Morgans, but the third cannot be explained by either, and must he due lo mitoticdislocation occurring at an early cleavage stage. Toprove this, Morgan devised an experiment. He crosseda, [c]nu\u/),a. homozygous for the sex linked charac ters of yellow body colour and while e\es with a, m
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