Oaks, kinds of, most and least re- 

 sorted to by May-beetles, 59. 



Oats and Wheat, estimated injury to, 

 by Chinch-bug in 1914, 71, 74. 



Osage Orange, May-beetles collected 

 from, 58. 



Parasite of egg of Chinch-bug, 96-97. 



Parasites of May-beetles and white- 

 grubs, 57, 65. 



Peach as food plant of May-beetles, 

 34, 44, 58, 60, 63, 64. 



Persian Olive, May-beetles collected 

 from, 58. 



Persimmon as food plant of May-bee- 

 tles, 29, 34, 35, 36, 37, 38, 39, 40, 

 41, 44, 45, 46, 58, 59, 60, 63, 64. 



Phyllophaga anxia, 31, 32, 35-36, 38, 



43, 63. 

 arcuata, 38, 47. 

 arkansana, 42. 

 balia, 43. 

 barda, 43. 

 biimpressa, 47. 

 bipartita, 35, 36, 44, 63, 64. 

 calceata, 43. 



congrua, 41. 



corrosa, 40, 44, 64. 



crassissima, 41. 



crenulata, 39-40, 44, 45, 64. 



delata, 41, 44, 64. 



drakii, 40, 44, 46, 63. 



dubia, 35, 47. 



ephilida, 34, 47. 



fervida, 38-39, 44, 46, 63. 



forbesi, 34, 44, 46, 63, 64. 



forsteri, 41, 44, 45, 64. 



fraterna, 36-37, 38, 45, 63, 64. 



fusca, 31-32, 33, 34, 36, 44, 46, 61, 



63, 65. 

 futilis, 31, 32, 33, 38, 61, 63, 65. 

 gibbosa, 47. 

 grandis, 40, 47. 

 hirticula, 27-29, 30, 31, 32, 37, 38, 



44, 46, 61, 63. 

 hirtiventris, 43. 

 horni, 42. 



ilicis, 32, 38, 46, 61, 63. 



implicita, 29-31, 32, 61, 63. 



inversa, 28, 32-33, 36, 44, 46, 61, 63. 



longitarsa, 42. 



micans, 28, 35, 37, 45, 63, 64. 



nitida, 41, 43, 44, 63. 



nova, 47. 



praetermissa, 42, 45, 64. 



profunda, 37, 45, 63, 64. 



prunina, 42. 



rugosa, 32, 34-35, 43, 61, 63. 



tristis, 37-38, 61, 63. 



Phyllophaga — Continued. 



vehemens, 28, 37, 39, 45, 46. 

 villifrons, 42. 

 dates of collection of: — 

 in central Illinois, 53, 54. 

 in northern Illinois, 51, 52. 

 in southern Illinois, 55, 56. 

 in Urbana, Illinois, 1906, 53. 

 general chronological list of species 

 of: 

 for central Illinois, 50. 

 for northern Illinois, 49. 

 for southern Illinois, 50. 

 grubs, 66, 67. 

 nomenclature of present paper on, 



25. 

 varying abundance of, in different 



years, 57. 

 (See also May -beetles and White- 

 grubs.) 

 Plum, May-beetles found on, 29, 34, 



38, 40, 58, 60, 63. 

 Poison Ivy, Phyllophaga crenulata 



collected from, 40, 58. 

 Poplar as food plant of Mav-beetles, 

 29, 30, 31, 32, 33, 35, 36, 37, 38, 

 40, 42, 43, 44, 51, 58, 59, 60, 61, 

 63. 

 Carolina, 59. 

 praetermissa, Phyllophaga, 42, 45, 64. 

 profunda, Phyllophaga, 37, 45, 63, 64. 

 "Protozoa as parasites of May-beetles 



and white-grubs, 57, 65. 

 prunina, Phyllophaga, 42. 



Easpberry as food plant of May-bee- 

 tles, 40. 



Eedbud, May-beetles collected from, 

 58. 



Eemedies and preventives for insect 

 depredations. (See Chinch-bug, un- 

 der artificial measures and ex- 

 periments for control of.) 



Eose as food plant of May-beetles, 

 34, 38, 40, 58, 60. 



rugosa, Phyllophaga, 32, 34, 43, 61, 

 63. 



San Jose Scale, 122. 



Snowball, May-beetles collected from, 

 58. 



Sporotrichum, 95. 



Sycamore as food plant of May-bee- 

 tles, 34, 58, 60. 



Syringa, May-beetles collected from, 



