BIBLIOGRAPHY OP ECONOMIC ENTOMOLOGY. 
319 
2267. [Riley, C. V., et al. ]—Continued. 
Chapter IX—Continued. 
Xyloirechus colonus Fabr., 257— Clytus (?) larva on black-birch, 
259—The ribbed rhagium, Eh. lineatum Oliver, 259—The lesser 
prionus, Orthosoma brunneum De Geer, 260—Unknown longicorn 
borer from an oak log, 261— Unknown longicorn borer in syca¬ 
more, 262. 
. Chapter X: 
The embryological development of the locust. By A. S. Packard, jr. 263 
Formation of the blastoderm, 263—Origin of the primitive amn*boid 
cells, 264—The blastodermic disc or pi'imitive band, 264—The 
germinal groove, 264—Origin of the cellular or germinal layers, 
264—Diagrammatic view of the origin of these layers, from Gra- 
ber, 265—Embryonal membranes, 265—Serous membrane, 265— 
Amnion, 265—Tabular view of the eight embryonal layers, 265— 
Division of the embryo or primitive band into body segments, 
266— Development of the appendages, 266 ; of the nervous sys¬ 
tem, 266; of the alimentary canal. 266—The stomodieum, 266— 
The proctodeum, 267—The mosenteron or stomach, 267—The 
pyloric appendages of the stomach, 267—The Malpighian tubes, 
267— The genital glands, 267—The tracheae and salivary glands, 
267—Spinning glands, 267—Development of the wings, 268—Crit¬ 
icism of Gegenbaur’s views, 269—#Yitz Muller’s views, 269— 
Speculation on the primary origin of wings, 270—Correlation of 
metamorphosis with the acquisition of wings, and of the latter 
with the ripening of the sexual organs, 271—Differentiation of 
mesonotum and metanotunx dependent on the presence of wings, 
271—Development of a pupal stage, 271—Genealogy of the or¬ 
ders of insects, 271. 
The embryological development of orthopterous insects. By A. S. 
Packard, jr. 271 
Rapid development of the embiyo in autumn, 272 — Embryology of 
Gryllotalpa vulgaris, 272—Formation and contraction of the em¬ 
bryonal skins, 272—Formation of the digestive canal, 272—Func¬ 
tions of the mid-gut and hind-gut, 273—Origin of the Malpighian 
vessels, salivary glands, tracheae, and ovaries, 273—The sections 
of eggs studied by the author, prepared by N. N. Mason, 273. 
Development of Caloptenus atlanis. By A. S. Packard, jr. 273 
Rapidity of development in locust eggs laid in autumn, 273—Requi¬ 
sites for the observation of stages earlier than those studied, 273— 
Method of preparation of the eggs studied, 274—Structure of the 
nervous system and eyes, 274 ; of the heart, 274—Mode of origin 
of the heart, 274—Contents of the heart, 274—Structure of the 
tracheax, 275; of the digestive canal, 275—Relations of the proc- 
todaium to the amnion, 275—Structure of the Malpighian tubes, 
276—The yolk cells and yolk granules, 276. 
Development of Caloptenus spretus. By A. S. Packard, jr. 277 
The primitive segments, 277—The nervous system, 277—The tra¬ 
cheae, 278—The digestive canal, 278—Details of structure in more 
advanced embryos, 278—Structure of eyes, 278—Origin of ocelli, 
278—Relations of antennae, eyes, clypeus, and labrum to the pro- 
celaphic lobes, 279—Structure of brain and other ganglia, 279— 
Relations of mandibles and the two pairs of maxillae, 279—Rela¬ 
tive development of legs, 279 — Sections of embryo about ready 
to hatch, 279. 
