Twelfth Report op the State Entomologist 169 



PAGE. 



Distribution of the Hudson River Valley Brood recorded by Pitch, 277. 

 Its distribution in the State of New York in 1894, 277. The abundance 

 of the insect in the various localities, 278. Its distribution in other 

 States, 278. Occurrence of the variety Cassinii, 279. The duration of 

 the imago state, 279. Discovery of Cicada chambers iu New York State, 

 279. Previously almost unknown in museums, 280. Extended areas 

 covered by the chambers iu Nyack, 280. Other localities in the State 

 where they were found, 280. Description and figures of the structures, 

 281. Their distribution in other states, 281. The manner of their 

 construction, '281. Method of repairing an injured chamber, 282. 

 Chambers built on several kinds of soil, 282. May be con- 

 structed only by the earlier appearing individuals, 282. Protection 

 afforded by them, 283. Earliest notice of the chambers, 283. Their 

 occurrence at Eahway, N. J., in a cellar, 283. Certificate procured by 

 Prof. Newberry, 284 His comments on the reason for their building 

 these structures, 284. The abundance of the insects compared with that 

 of earlier appearances, 285. The effect of deep cultivation on the Cicada, 

 285. The favorite haunts of the insect, 286. The hosts in certain locali- 

 ties, 286. Natural that their numbers should vary from generation to 

 generation, 286. The females deposit eggs in almost all trees, 286. 

 Excessive damages by ovij)osition in certain localities, 287. Reported 

 injuries to persons from " Cicada stings," 287. The female not known to 

 inflict a painful wound, 288. Vertebrate enemies of the Cicada, 288. 

 English sparrow devouring large numbers, 289. The fungus affecting 

 the Cicada widely distributed, 289. Enclosing trees with netting and 

 refraining from setting out trees in Cicada localities for a year or two 

 before their appearance, 289. 



Pemphigus rhois, the Sumac-Gall Aphis 290 



Bibliography, 290. General appearance and reference to different 

 genera, 290. Description of the galls and the immature aphids by Dr. 

 Fitch, 290. Observations on the form of the galls, 291. Description of 

 the imago, 291. Life-history and food-plants, 291. Distribution, 292. 



OOSSYPARIA TJLMI, the Elm-Tree Bark-louse 292 



Bibliography, 292. Associated with the elm-leaf beetle, 293. An 

 introduced insect, 293. History of its spread over the country, 294. Its 



