u 
ulmicola, Oberea, 118. 
Ulmus americana, 118. 
iindata, Pyrgota, 162. 
U. S. Department of Agriculture, Division 
of Entomology, 7. 
University of Illinois, Chemical Department 
of, 92. 
V'asey, Robert W., 107. 
\'irginia Creeper subject to injviry by Cot- 
tony Maple Scale, 103. 
N'iviana sp. as parasite of May-beetle, 163. 
vulgaris, Melolontha, i3"7. 
w 
Walnut, Black, subject to injury by Cottony 
Maple Scale, 103. 
flamed with gasoline blast-lamp, 52. 
Warder, Reuben H., 102, 112. 
Webster, F. M., 6, 44, 118, 119, 124, 127. 
Webster, R. L., 124. 
Weed, C. M., 94- 
Weed, H. E-, 6, 100, 103, 106, 10-. 
West, J. A., 148, 150, 158, 162. 
Westcott, O. S., 140, 141, 142. 
Whale-oil soap solution and kerosene emul- 
sion, comparative cost of, 43, 57. 
for Chinch-bug, 42, 43. 
for Cottony Maple Scale, 108, 109, no. 
Wheat, I. 
White Ash as food plant of May-beetles, 143. 
-grubs and May-beetles, food and feeding 
• habits of, 142. 
injuries to crops by, 165 — 166. 
(Lachnosterna), on the life history, 
habits, and economic relations of the, 
135—168. 
WliitP -g'rubs and Ma3--beetles — Conciiiii,\i. 
migration and dispersal of, 145 — 150. 
miscellaneous insect enemies of, 160 — 
163- 
preventive and remedial measures 
against, 166 — 168. 
principal enemies of, 156 — 160. 
articles on, cited, 136, 137, 167. 
concerted action against, 168. 
difference in time of plowing ground in- 
fested by, 165. 
diseases and enemies of, 136, 167. 
economic species of, 136. 
extent of destruction of, by Common 
Grub -Wasp, 160. 
food preferences of adults of, 142 — 145 
life cycles of two European species of, 
137- 
life histories of injurious species of 
137—140. 
relations of, to agricultural management 
165. 
to soil and subsoil, mode of collect 
ing data on, 164. 
results of experiment with pigs for, 166 
— 167. 
(See also under Lachnosterna and Cy- 
clocephala.) 
or American, Elm, injury to, by ^.... 
Twig-girdler, 118 — 121. 
Willow as food plant of May-beetles, 143, 
144. 
subject to injury by Cottony Maple Scale, 
103. 
Wistaria, mature egg-laying Cottony Maple 
Scale on, 103. 
Woolly Aphis, gasoline blast-lam 
against, 51. 
bears, gasoline blast-lamp used agai 
