San Jose Scale, loosening- of — Ct?///. 

 liy rain and water sprays, 

 88. 

 method of icprdduclidii nf, 



113- 



methods and results of tii'ld 

 insecticide work against, in 

 i89g-iQ02, 27 66. 

 spontaneous death of, 6<). 

 trees equally infested by, 1 16. 

 winter stage of, 113. 

 washes for, 8g. 

 Sanninoidea exitiosa, 121. See 



Peach-tree Borer. 

 Scale insects or bark-lice, 112 121. 

 eggs of, 100, 103, 104, 112, 113. 

 (See also under Eggs.) 

 general description of, 100, 112. 

 hibernation of, 104, 1 13. 

 idcntiiication of, in winter, 104. 

 insecticide treatment for, 113. 

 methods of reproduction of, 



112, 113. 

 nursery, wintering in the egg, 

 118 121. 

 wintering partly or fully 

 grown, 114 1 1 8. 

 ring-and-nipple, 1 14, 115, 116. 

 See under San Jose .Scale and 

 its allies. 



(See also under \arious 

 nanies of scale insects.) 

 Schi/oneura lanigera, 106. See 



Woolly Aphis. 

 Scirpus fluviatilis infested by Sphe- 



nophorusochreus, 10, 12, 13, 15. 

 Scurfy Scale, distribution in Illi- 

 nois, 1 18. 

 economic ini|)ortance of, 118. 

 eggs of, 1 18. 



general descrij^tion of, 118. 

 measures against, 118. 

 spread of, i iq. 

 winter stage of, 1 13. 

 Sedge infested by Sphenophorus 



ochreus, 12. 

 Sedges, 2. 



Setaria as food plant of S|)henoph- 

 orus ochreus, 13. 

 -Shade trees and forest trees, Can- 

 ker-worm on, 139 144. 



Slingerland, M. V., on Black 

 I'each-Aphis, 108. 

 on Peach-tree Borer, 122, 124. 

 on pear-leaf blister, pa|)er 

 cited, 132, 133. 

 Smith, John B., on lime, salt, and 

 suljjhur wash for .San Jose Scale 

 in Pacific states, 67. 

 Snout-beetles. See Bill-bugs. 

 Sphenophorus cariosus, i()-2i, 

 breeding plants of, i<;. 

 dates for imago of, i(). 

 description of larva of, 21. 

 eggs of, U). 

 life liistory of, ig. 

 ochreus, 9-17, ig. 



descriptive notes on, 17. 

 eggs of, 10, 1 1, 12, 13, 15, 16, 17. 

 experiment with beetles of, on 

 Corn, 1 1, 

 extraordinary injury to Corn in 

 Cireene county, 14 16. 

 injuries by, in Whiteside, 

 Adams, and .Schuyler coun- 

 ties, 13. 



injury to Corn in I'ord comity 

 in 1888 by, g 1 1 ; in i88g, I2. 

 life history of, 12, 14. 

 metluxl of feeding of, 11. 

 prevention of injury to Corn 

 by, I. 

 parvulus, eggs of, 5. 

 U)od plants of. 6. 

 infested by mites, 4. 

 injury to Corn by, 3, 4, 5, 6, 7. 

 life history of, 3 7, 22. 

 pertinax, 13, 14, 15, 17 18. 



character of injury to C(jrn, 18. 

 eggs of, 18. 

 life history of, 18. 

 placidus, injuries to Corn by, 8. 



life history of, 8. 

 robustus, 22. 

 scoparius found on Corn and 



Grass, 21. 

 sculptilis, injuries to Corn by, 2i, 

 22. 



injury to meadows by, 22. 

 life history of, 22. 

 zea.', 21. 

 Stanton, J. W., 39. 



