72 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
1162. Pierce, N. B. Bees and pear blight. <Pacific Rural Press, 25 
May, 1901. 
1163. Piper, C. V. Orchard enemies in the Pacific Northwest. 
<Farmers’ Bulletin No. 153, U. S. Dept. Agric., June, 1902, 
pp. 38, 3 figs. 
1164. Piper, C. V. Notes on Perandbrus scabricollis Thos. <Bull. 
No. 46, Div. Ent., U. S. Dept. Agric., May, 1904, pp. 60-61. 
1165. Piper, C. V., and R. W. Thatcher. Spraying for the San Jose 
scale with modifications of the sulphur-salt-lime wash, and 
chemical notes on this wash. <Bull. No. 56, Wash. Agric. 
Exp. Station, November, 1903, pp. 31. 
1166. Platt, G. F. The San Jose scale; what it has done in Connect¬ 
icut. <Rural New Yorker, 20 August, 1904. 
1167. Popenoe, E. A. The buffalo tree hopper. <Press Bull. No. 
68, Kans. Agric. Exp. Sta., 14 May, 1900, pp. 2. 
1168. Popenoe, E. A. Causes of failure in spraying. <Press Bull. 
No. 66, Kans. Agric. Exp. Sta., 27 March, 1900, pp. 2. 
<Calif. Cultivator, 10 August, 1900, p. 89. 
1169. Popenoe, E. A. The clover-hay worm. <Press Bull. No. 91, 
Kansas Agric. Exp. Sta., June, 1901, pp. 2. 
1170. Popenoe, E. A. Grain weevils. <Prairie Farmer, 9 Novem¬ 
ber, 1901. <Nebraska Farmer, 1901, p. 1031. 
1171. Popenoe, E. A. Preventing Hessian fly damage. <Orange 
Judd Farmer, 22 August, 1903. <American Agriculturist, 
12 September, 1903, p. 205. 
1172. Pough, F. H. The lime and sulphur wash. <Rural New 
Yorker, 11 June, 1904, p. 459. 
1173. Powers, S. The Hessian fly. <Country Gentleman, 31 Octo¬ 
ber, 1901, p. 889. 
1174. Pratt, A. Report of committee on gipsy moth. <Rept. Mass. 
State Board Agric., 1901, pp. 313-319. 
1175. Price, H. C. Hydrocyanic-acid gas in greenhouses. <Amer. 
Florist, 1902, pp. 405-406. 
1176. Price, R. H. The lime, sulphur, and salt wash for San Jose 
scale. <Southern Planter, February, 1904. 
1177. Price, S. F. A fern enemy. <Fern Bulletin, October, 
1900, pp. 86-87. 
A Podurid injuring roots. 
1178. Putnam, B. L. The currant worm. <Wisconsin Agricul¬ 
turist, 25 April, 1901, p. 8. 
1179. Quaintance, A. L. Observations on Didbrotica 1%-punctata 
Oliv. <Bull. No. 26, n. s., Div. Ent., U. S. Dept. Agric., 
October, 1900, pp. 35-40. 
