227 



The silk eaten by a black or dark green caterpillar with two yellow 

 stripes on each side connected across the l)ack by ninnerous fine 

 white lines (Fig. 163) The Zebra-catiTpilJar, p. 171 



iiy green or yellow, l)lack-s})otted or -striped beetles ;il)f)iit a (|uarter of 

 an inch long (Fig. 184-18()) Tlie Hoot-wonn Beetles, [). 1S7 



By a small oval or oblong beetle, yellowish to brownish, about an 

 eighth of an inch long Luperodes varicornift, p. 187 



By a beetle about a third of an inch in length (Fig. 182) and shaped 

 like a June-bug Anomala undulatn, p. 185 



By slender, soft-l)odied, cylindrical beetles, black or striped (Fig. 

 "94-97) " Blister-beetles, p. 11 1 



3. Ants hollowing out grains on ear p. 159 



Very small caterpillars eating kernels on the ear. . . . Batrachedra rileyi, p. 17() 

 Active ground-beetles of medium size hollowing out the ripened grain, p. 17(5 

 Minute beetles of various kinds common on corn in the ear, sometimes in- 

 juring the kernels, but usually feeding on fungi due to previous 

 injury p. 180 



A black beetle with four yellow spots (Fig. 176), occasionally common 



on ripe ears, especially those fallen, injured, or partly decayed 



Ips 4-guttatus, p. 181 



Dung-beetles and related species, a sixth to a half inch long, feeding 

 on rotten or fallen corn p. 183 



Crickets, black or white, hollowing out the grains p. 213 



Dark, cylindrical, hard, many-jointed worms, with many pairs of legs 

 (Fig. 235), eating the green silks, or feeding on corn in the ear, par- 

 ticularly when fallen or touching the ground Millipeds, p. 222 



4. Green beetles nearly an inch long, with dull yellowish margin to thorax 



and wing-covers (Fig. 82, 83) The Green June-beetles, p. 101 



Brownish beetles about half an inch long (Fig. 80, 81) 



(Flower-beetles), p. 99 



D. Injuries to the Tassel. 



Stem with row of small roughened patches containing elongate eggs (Fig. 134) 

 Tree-crickets and Meadow Grasshoppers, pp. 215, 144 



Tassel covered by web and eaten by active yellowish caterpillars about half an 

 inch long The Sorghum Web-worm {Celama sorghiella), p. 169 



P^allen pollen eaten by insects of various kinds pp. 156, 162, 179, 180, 188 



E. Injuries Affecting the Whole Plant. 



Plant not inclosed in web. The entire plant more or less completely eaten, the 

 leaves first and then the stalk, in June and early July by hordes of striped 

 caterpillars commonly coming into the field from one side (PL II.; Fig. 63, b). 

 The Army-worm (Leucania unipuncta), p. 47 



Young shoots eaten by an oval beetle (Fig. 172). Southern States 



Omophron labiatum, p. 1 78 



The young plants eaten by an elongate, long-legged, buff-colored beetle (Fig. 181) 

 The Rose-chafer {M acrodactylus subspinosus) , p. 184 



The young plant, or the base of older plants, more or less completely inclosed in a 

 distinct web, and the leaves eaten by small, active, slender caterpillars five 



eighths of an inch long (Fig. 70) 



The Garden Web-worm (Loxostege similalis), p. 89 



Plant dwarfed or apparently unhealthy, generally or diffusely discolored, or wilted, 

 or merely dwarfed without notable discoloration. No local loss of substance 



under or above ground sufficient to account for its condition 



" Insects injuring the Com Plant obscurely," p. 233 



F. Injuries to the Underground Parts of the Plant : the 



Roots, the Planted 8eed, or the Stalk 



near the Roots. 



Injuries to the seed. 2 



Roots injured or destroyed, with evident loss of substance. 6 



Growth of plant retarded or arrested; roots stunted or deadened without ap- 

 parent loss of substance. Ants burrowing among hills; plant-lice on roots. 



Corn Root-lice, Eighteenth Report, p. 55 



Injuries to the stem under ground. 7 



