IV 
PAGE 
Description. 8( 
On the Ants Attendant on the Corn Root Aphis. 
Schizoneura vanicola (The Grass Root Louse).. 8.' 
Life History... & 
Relations to Ants. 8t 
Description. 9 ( 
Trama erigeronensis . 9 J 
Description. 9^ 
Forda occidentalis, n. sp. 9 jj 
Description. 96 
Tychea brevicornis, n. sp. 97 
Description. 97 
Geoica squamosa, n. gen. et sp. 9S 
Description. 101 
Ehizobius spicatus, n. sp. (The Woolly Grass Root Louse). 104 
Description... 105 
Dcctylopius sorghiellus (The Corn Mealy Bug). 106 
Description. 107 
Injuries by White Grubs. 109 
Lachnosterna and Cyclocephala (Common White Grubs).... 109 
Injuries to Corn and other Vegetation. Ill 
Life History and Habits. 115 
Lachnosterna, Imago. 115 
The Egg. 118 
Larval Period. 119 
Pupation and Formation of Beetle. 120 
Cyclocephala. 121 
Natural Enemies. 122 
Preventive and Remedial Measures. 127 
Local Prevention. 127 
General Prevention. 129 
Remedial Measures. 132 
The Contagious Diseases of the White Grubs. 133 
Description. 137 
List of Illinois Species of Lachnosterna. 139 
Key to the Illinois Species of Lachnosterna. 140 
A llorhina nitida iThe Green June Beetle). 144 
Prionus Grubs. 146 
Injuries by Root Woi ms. 146 
Eiabrotica 12-punctata (The Southern Corn Loot Worm). 146 
Life History. 149 
Natural Enemies. 150 
Remedial Measures. 152 
Description. 152 
Diabrotica longicornis (The Northern Corn Root Worm). 154 
Injuries to Corn. 154 
Food of the Beetle. 157 
Life History. 158 
Habits of Beetle and Larva. 159 
Natural Enemies. 161 
Prevention and Remedy. 162 
Description. 162 
