328 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



2291. RILEY, C. V. Continued. 

 CABBAGE INSECTS Continued. 



The cabbage Oscinis, Oscinis brassicce 322 



First found at St. Louis, 322 Habits, 322 Descriptive, Oscinis 

 brassica; n. sp., 322. 



The Rocky Mountain locust, Caloptenus spretus 323 



Successful introduction of a parasite (Apanteles glomeratus) of the 



imported cabbage-worin 323 



GENERAL, TRUTHS IN APPLIED ENTOMOLOGY 323 



Introductory, 323 Benefits derived from insects, 324 Influence 

 of civilization upon insect increase, 324 Losses fr%m insects, 

 324 Knowledge which the economic entomologist should pos- 

 sess, 325 -Habits of the grape phylloxera, 325 Number of 

 species of insects, 326 The different insecticides, 326 Arsen- 

 ical compounds, 327 Petroleum, 327 Kerosene emulsions, 

 328 Pyrethrum, 328 Its cultivation in California, 328 Its 

 influence on mammals, 329 Insecticides to be used against 

 root-feeding insects, 329 Mechanical contrivances, 329 The 

 eddy-chamber or cyclone nozzle, 330. 



KEROSENE EMULSIONS 330 



Their importance as insecticides, 330 Use in orange groves, 

 330 Warning against imperfect emulsions, 331 Formula for 

 kerosene and soap emulsions, 331 Importance of a stable 

 emulsion, 331 Use of a force-pump in making emulsions, 331 

 Trees injured by unemulsified oil, 332 The use of ley washes 

 in California, 333. 



MISCELLANEOUS INSECTS 334 



The American Cimbex, Cimbex americana 334 



Injury to willows, 334 A new habit, 334 Eggs and mode of 

 oviposition, 335 Habits of young larva, 335 Remedies, 336 

 Other willow enemies, 336. 



. The streaked cotton wood leaf-beetle, Lina scripta 336 



Value of the cotton wood in the West, 336 Damage by the beetle 

 in 1884, 336 Other food-plants, and former injuries, 337 

 Natural history, 338 Remedies, 338 Apparatus for poisoning, 

 339 Varieties of the beetle, 340. 



The Southern buffalo-gnat, Simit Hum. pecuarum . 340 



Losses in former years, 340 Damage done by European species, 

 341 Early states of European species, 342 Early states of 

 American species, 342 Recent ravages in the Southwest, 343 

 Remedies, 344 Smudges, 344 Body applications, 344 Sug- 

 gestions, 345. 



The angoumois grain-moth, Gelechia cerealella 345 



Abundance, 345 Origin, 345 Past history, 346 Natural history 

 and method of work, 346 Number of annual generations, 347 

 Results of its work, 347 Parasites, 348 Remedies. 348 

 Baking and concussions, 348 Quarantine, 348 Bisulphide of 

 carbon, 349 Preventive measures,' 349 Description of eggs. 

 350. 



The cottony maple scale, Pnlvinaria innuriierdbilis 350 



Distribution, 350 History and synonymy, 350 Lifehistory, 351 

 Food-plants, 352 Mode of spreading, 353 Natural enemies, 

 354 Remedies, 355. 



The cranberry fruit- worm, Acrobasis vaccinii 355 



Natural history, 355 Remedies, 356 Descriptive, Acrobasis vac- 

 cinii n. sp., 356 Systematic position, 357. 



