Table of Contents. 115 



PAGE. 



shown that the eye-spottfd liud-moth does not appear on the wing in 

 May, 220. Reference to Mr. Slingerlaiid's Bulletin on it, and another 

 on the pear-tree Psylla, 220. 



Some Injurious Insects of 1890 221 



A paper read before a Farmers' club by Mr. Young notices a blight 

 in wheat and rye; an insect attack on oats; the potato scab; the elm- 

 leaf beetle: comments requested on it, 221. Examination of wheat 

 and rye from several locaUties show attacks of a Nematode worm, 



221. Study lately given to Nematode attacks, 221. "Clover-sickness" 

 in England caused by a Nematode, 221. Publications on the An- 

 guillulidce, 221, 222. Blight in oats associated with bacteria presence, 



222. Shrivehng of oats caused by the grain aphis, 222. Studies of the 

 potato scab have shown several kinds proceeding from different causes, 



223. One form shown by Dr. Thaxter to be caused by bacteria, 222. 

 A " surface-scab" and the " deep-scab," 232. Beneficial effect of heavy 

 rains in destroying the elm-leaf beetle, not before reported, 222. A 

 simple remedy suggested by it. 228. Request for investigation of 

 insect attacks always welcomed, 223. 



APPENDIX. 



(A) ENTOMOLOGICAL ADDRESSES 227 



Some Injurious Insects of Massachusetts 227 



Gratification in addressing the State Board of Agriculture, 227. 

 What the State has done for the promotion of economic entomology, 



227. A prize offered a century ago for the best essay on the canker- 

 worm, 227. The prize awarded to W. D. Peck, 228. The " Natural 

 History of the Canker-worm," a pioneer in a new line of investigation, 



228. Another valuable publication by Mr. Peck, 228. Investigations 

 of Dr. Harris, stimulated by Prof. Peck. 228. The entomological 

 work of Dr. Harris, 228. His valuable publications, 228. Report on 

 Insects Injurious to Vegetation, 238. Subsequent studies and pub- 

 lications of Mr. Sanborn and Dr. Packard, 2i!9. Other publications, 229. 

 The collection in economic entomology in the Cambridge Museum 

 made by Dr. Hagen, 229. Its unrivalled richness, 33C. Benefits result- 

 ing from its study, 2^0. Topics for the present paper suggested l)y the 

 Secretary, 231. Necessity of knowing w^lio our insect foes are, 

 231. Nature of attacks often misunderstood, 231. Cut- worms: their 

 place in classification; number of species; their principal features, 232. 

 Habits of the caterpillars and the moths, 233 . Their natural history and 

 varied food-plants, 234. Their injury to grass, corn, wheat and bar- 

 ley, 2-35. Species attacking cabbage, 235. Injuries to turnips, onions, 

 beans, clover, tobacco and flowering plants, 286. Their natural 

 enemies, 236. The robin a formidable enemy, 237. The insects that 

 feed upon them, 337. Tlie parasites that destroy them, 238. Among 



