VI 
TABLE OF CONTENTS. 
Page. 
The brain of the locust— Continued. 
— The antennal or olfactory lobes, 235 — The commissural lobes, 235 — The 
brain of locusts compared with that of other insects, 235, 23G — Structure of 
the brain in the embryo locust, 23(3 — The brain of the embryo locust com- 
pared with the first thoracic ganglion, 238 — The brain in the second em- 
bryonic stage, 238, 239 — Structure of the suboesophageal ganglion, 239 — 
The brain of the freshly hatched larva of Caloptenus «j>re<««, 239 — of the 
third larval stage of C. bivittatus, 239 — of the second or last pupal stage of 
C. spretus, 240, 241 — Bibliography of the internal structure of the brain 
of Crustacea and insects, 241, 242. 
CHAPTER XII. 
Locust ravages in California 242 
Position of the genus Camnula in the CEdipodini, 242, 243 — Description of the 
genus Camnula, 243— of QZdipoda pellucida, 24'.! — of (Edipoda atrox, 243, 244 — 
of Camnula pellucida, 244-246 — The locust in California in 1878, 246 — in 
Sierra Valley, 247 — in the vicinity of Loyalton, 247, 248 — of Sierraville, 
249 — History of locust devastation iu California, 250 — Enemies of the 
Californian locust, 251 — Protective measures, 251,252 — Life history of 
Camnula atrox, 252, 253 — The red or locust mite, 253 — Damage done by the 
locust in Sierra Valley, 254, 255 — The locust in California in 1879, 255-257 — 
Description of (Edipoda obliterata, 257-259 — Remarks on Cratypedea Put- 
nami, 259. 
CHAPTER XIII. 
Further facts about the natural enemies of the locust 259 
Blister-beetle larvse feeding on the eggs of the Californian locust, 259, 260 — 
Retardation in the development of blister-beetles, as shown in Epicauta 
vittata, 260 — Philosophy of such retardation, 260, 261 — Eggs of Chauliog- 
nathua pennsylvanicua, 261 — Habits of the young larva, 261, 262 — Egg-laying 
of Asilid-flies, and particularly of Mallophora orcina, 262 — Bee-fly larvae 
common among the eggs of Camnula pellucida, 263 — Habits of bee-fly 
larvie, 263, 264 — Observations on the larval habits of Bombilii, 264, 265 — 
Larval habits of Argyramwba, 265,266 — Abundance of bee-flies and blis- 
ter-beetles in the Western country, connected with the abundance of 
locusts, 266 — Life history of Systachus areas, 266, 267 — Description of its 
larva, 267 — of the pupa, 267, 268 — of the imago, 263 — Description of Syt- 
toechu8 oreas, 268 — Larva of Triodites mus, 268, 269 — Image of Trioditcs mua, 
269 — Dr. T. A. Chapman's observations on Bombylius major, 269 — Hair- 
worms and red-mites abundant upon locusts in California, 270 — Chalcid- 
fly parasitic on locusts, 270 — Synonymy of the locust-egg parasite, 270 — 
Digger-wasps killing locusts, 270. 
Chapter XIV. 
Courses that may be adopted by the general government to lessen 
locust injury 271 
Importance of destroying the locusts in their native breeding-grounds, 
271 — Recapitulation of means suggested in first report, 271 — Importation 
of English rooks, 271 — Importance of burning over the permanent breed- 
ing-grounds, 272 — Breeding-grounds occupy comparatively small areas in 
the Permanent region, 273 — Protection from invading swarms, 273 — Locust 
warnings through the Signal Bureau, 273 — Diverting swarms by means of 
smoke, 274 — Co-operation of governments and governmental institutions, 
274 — Apathy apt to result from periods of immunity from locust inva- 
sions, 274 — How the government can aid, 275 — Surface characteristics of 
