54 
b. No notable number of insects present. The lowest roots 
dead; surface of underground part of stalk with 
brownish corroded spots, interior of this part 
darker, at least at the joints, while the spaces 
between may be seemingly healthy. (Root 
blight of corn, a bacterial disease; not ento¬ 
mological.) Page 52. 
2. Roots evidently injured or destroyed by perforations, gnaw¬ 
ing, burrowing, decay, or other loss of sub¬ 
stance. Page 109. 
a. Roots eaten away, not burrowed or perforated, and 
without rotten or withered tips; tap-root com¬ 
monly gone or decayed. White grubs in soil 
among or beneath the roots. Page 109. 
White Grubs: Page 109. 
Lachnosterna rugosa. (Plate XII., Fig. 1-3.) Page 
139. 
Lachnosterna fusca. (Plate XII., Fig. 4 and 5 ) 
Page 138. 
Lachnosterna in versa. (Plate XII., Fig. 5.) Page 
138. 
Lachnosterna hirticula. (Plate XII., Fig. 3.) Page 
139. 
Lachnosterna gibbosa. (Plate XII., Fie;. 6 and 7.) 
Page 139. 6 ' 
Cyclocephala immaculata. (Plate XII., Fig. 8; and 
Plate XIII., Fig. 1 and 2.) Page 138. 
Allorhina nitida (The Green June Beetle). (Plate 
XIII., Fig. 7.) Page 144. 
Prionus laticollis. (Plate XIII., Fig. 4, 5, and 6 ) 
Page 146. '' 
Prionus imbricornis. (Plate XIII., Fig. 3, 5, and 6.) 
Page 146. ' 
b. Roots penetrated, perforated, irregularly burrowed, and 
more or less eaten off and eaten up. Under¬ 
ground parts of stalk also usually similarly in¬ 
jured. Page 146. 
Wireworms in soil among the roots. Page 28. 
Wireworms: Pages 28, 47, 48. 
Cardiophorus sp. (Plate IV., Fig. 6.) Page 32. 
Drasterius elegans. (Plate V., Fig. 1-3.) Page 34. 
Agriotes mancus (The Wheat Wireworm). (Plate 
V., Fig. 4-6.) Page 36. 
