1)7 



Lachnosterna inversa — Continued. 



infested by Sporotrichum globulifer- 



um, xvii, 81. 

 larval period of, or of L. fusca, 

 xviii, 113. 

 key to Illinois species of, xvii, 47-51 ; 



xviii, 140-144. 

 knochii. xvii, 47, 50; xviii, 140, 143. 

 lanceolata, xvii, 47, 48; xviii, 139, 



141: xxiii. 184. 

 larvae, infection experiment with, xix, 

 72. 77, 78, 79. 

 killed by hymenopterous parasite, 

 xix, 79. 

 life histories of injurious species of, 



xxiv, 137-140. 

 life historv and habits of, xvii, 31-40; 



xviii, 115-121. 

 lunula, xvii, 47, 51 ; xviii, 140. 143. 

 list of Illinois species of, xvii, 47; 



xviii, 139-140. 

 longitarsus, xvii, 47, 49; xviii, 139, 



141. 

 marginalis, xvii, 47, 50; xviii, 140, 



143. 

 micans, xvii, 47, 50; xviii, 139, 142. 

 nova, xvii, 47, 50; xviii, 140, 143. 

 pra?termissa, xvii, 47, 48; xviii, 139, 



141. 

 prunina, xvii, 47, 49; xviii, 139 (Er- 

 rata), 142. 

 pupa; and imagos of, from earth, xvii, 



37-38. 

 rubiginosa, food plants of, xviii, 115. 

 rugosa, xvii. 35, 36, 37, 38, 45, 47, 

 50; xviii, 54, 111, 112, 113, 140, 

 143; xxiv, 137, 139. 140, 141, 143, 

 144, 145, 149, 150, 151. 152. 

 eggs of, xviii,' 113. 

 injury to Beet by, xxi, 164. 

 tristis, xvii, 36, 37, 41, 47. 51 : xviii, 

 113, 140, 144; xxiv. 137, 138, 139, 

 140, 141, 143, 144, 152. 

 villifrons, xvii, 47, 51 ; xviii, 140, 143. 

 spp., xiii, 62. 143: Misc. Ess., 100; 

 xvii, 40, 41, 45. 

 eggs of, xviii, 118-119. 

 imagos of, xviii. 115-117. 

 larval period of, xviii, 119-120. 

 modes and places of hibernation of. 

 in central Illinois, xxiv, 155-156. 

 pupation and formation of beetles 



of. xviii. 120. 

 variation in numbers and dominance 

 of. xxiv, 140-142. 

 (See also White-grubs.) 

 lacustris, Scirpus, xvi, 68. 

 Ladybird, minute, as enemy of San Jose 

 Scale, xx, 21. 



Ladybird — Continued. 

 Twice-stabbed, xxi, 43, 44. 



or Two-spotted, as enemy of San 

 Jose Scale, xx, 20. 

 description of, xx, 20. 

 (See also Ladybug, Twice- 

 stabbed or Two-spotted.) 

 (See also Ladybug.) 

 Ladybirds as enemies of Common Gar- 

 den Web-worm, xxi, 109. 

 (See also Ladybugs.) 

 Ladybug, Common, Misc. Ess., 92; 

 xxiii, 231. 

 as check on multiplication of Corn 



Plant-louse, xiv, 22. 

 description of, xxiii, 179. 

 injury to Corn by, xiv, 22; xxiii, 



179. 

 ordinary food of, in corn fields, xiv, 

 22. 

 Smaller Two-spotted, as destroyer of 



Maple Bark-louse, xiv, 33. 

 Twice-stabbed, as enemy of Cottony 

 Maple Scale, xxiv, 115. 

 (See also Ladybird, Two-spotted 

 or Twice-stabbed.) 

 Ladybugs, xxi, 99, 113. 



as enemies of Cottony Maple Scale, 

 xxiv, 115, 117. 

 of plant-lice, xiii, 103 ; xiv, 24, 

 33; xxi, 81. 

 food habits of and injury by, xxiii, 



179. 

 (See also Ladybirds.) 

 Lamb's-quarters, xxi, 52. 



as food plant of Agallia sanguinolenta, 

 xxi, 70. 

 of Apantesis arge, xxiii, 75. 

 of beet leaf-miners, xxi, 60. 

 of Beet Web-worm, xxi, 110. 

 of Cabbage Plusia, xxi, 152. 

 of Campvlacantha olivacea, xxi, 



135; xxiii. 213. 

 of European Beet-Tortoise-bee- 



tle, xxi, 124. 

 of Garden Mamestra, xxi, 151. 

 of garden web-worms, xxi. 106, 



107. 

 of Grass-worm, xxiii, 82. 

 ®f Pale-striped Flea-beetle, xviii. 



22: xxi. 122: xxiii. 108. 

 of Red-headed Flea-beetle, xxi, 



120. 

 of Silpha bituberosa, xxi, 137. 

 of Spotted Blister-beetle, xxi, 



139. 

 of Three-spotted Flea-beetle, xxi, 



115. 

 of Yellow-Black Flea-beetle, xxi, 



116. 

 of Zebra-caterpillar, xxi, 153. 



