IS 



Unknown Coleopterous Larva (Elatcridcs?) 



Hie Leaf-beetles (Chrysomelidce) 185 187 



Hie Root-worm Beetles (Diabrotica) 187 



rhe Flea beetles (Halticini) 190 



Chelymorpha argus (The Argus Tortoise-beetle) 192 



The Snout-beetles (Rhynchophora) 192-104 



rhe Stink-bugs (Pentatomida) 194-196 



Other Plant-feeding Heteroptera 197-202 



Triphleps insidiosus (The Common Flower-bug) 202 



rh< ! latas -"2 204 



The Leaf-hoppers i Delphacince and Jassidee) 204-206 



Plant-lice (Aphidida) 206-211 



Diapheromera velii (The Prairie Walking-stick) 211 



sshoppers I Acridid<e) 212 213 



The Cricket Family ( Gryllidee) . ... . 213-215 



Tree-crickets — or White Crickets or Climbing Crickets — 



(CEcanthina) 2\~--222 



rhousand legged Worms (Myriapoda) 222 223 



The Red Spiders ( Tetranychus) 22^-224 



Ke> to the Discussion of Insect Injuries to Corn 225-233 



A Li-: i f Com Insects with References to Economic Articles: 



General Articles 234 



S ecies 234-273 



Hymenoptera 



Diptera 235 



Lepidoptera 



leoptera 24° 



Hemiptera 261 



hoptera 268 



Myriapoda 272 



Acarina 273 



TWEN rY-FOURTH REPORT 



Injury to Corn by the Timothy Bill-bugs (Sphenophorus spA 1-7 



Field Experiments on the Corn Root-aphis (Aphis maidiradicis Forbes).. 8-29 



Field Experiments tor the Protection of Corn against Chinch-bug Injury 30-58 

 Comparative Experiments with Various Insecticides t'or the San 



Scale 



Spraying Apples for the Plum-curculio 78-99 



The Cottony Maple Scale in Illinois 100-117 



lm Twig-girdler, Oberea ulmicola Chittenden 11S-134 



On the Life History, Habits, and Economic Relations of the White-grubs 



and May-beetles I rna) 135-168 



