Note 13 — PART I.—MORPHOLOGY AND PHYSIOLOGY (continued 2)

While these pages are still in type, we may add, in confirmation of this view, that Uzel states, from his researches on the embryology of Campodea, that the maxillary tergites of the embryo only slightly share in building up the tergal region (occiput) of the head, but that they form the genæ of the maxillary segments. (Zool. Anzeiger, July 5, 1897, p. 235.)