230 THE CANADIAN ENTOMOLOGIST. 



came to this place. The distance is i8 miles, and the road ascends a 

 high mountain chain and then descends into this valley, which is close to 

 the junction of the East Fork with the Yellowstone, and is 15 or 20 miles 

 below the Grand Canon. We are here in a most beautiful country of 

 great diversity, and almost never visited by tourists. There are dense 

 forests of spruce and fir, some of the latter reaching a good size ; there 

 are also parks and meadows, lots of streams, from the great Yellowstone 

 River to the smallest brooklet. Rocks, grass-covered hills, wild flowers, 

 desert plants, abound in infinite variety, and there are also warm springs 

 near at hand. We are all of us very much pleased, and I have good col- 

 lecting, while the freshest and most bracing mountain air invigorates 

 all of us." 



In commenting on this paper, Mr. Schwarz remarked that the glisten- 

 ing surface of large bodies of water was known to attract many insects? 

 but that in the case of the hot springs of the Yellowstone Park, which 

 are of small extent, we must in all probability seek for another cause to 

 account for the multitude of insects that fall into the hot water. It ap- 

 peared quite probable that the gaseous exhalations of these springs and 

 geysers would prove to be the attractive cause, and he recalled the fact 

 that at the solfataras of European volcanoes large numbers of suffocated 

 insects had been observed, the presence of which could hardly be due to 

 accident. Similar observations had also been made at the solfataras near 

 Santa Barbara, Cala. Among the Coleoptera, found by Mr. Hubbard in or 

 near the hot springs, the JVebrias are of especial interest, because we had 

 hitherto been accustomed to associate the occurrence of these Carabids 

 with cold streams and snowfields in alpine regions. 



Mr. Lintner expressed his appreciation of the character of the paper, 

 and complimented Messrs. Hubbard and Schwarz on the excellent service 

 done by them in working up the fauna of special regions. 



Mr. Lintner spoke on 



THE PEAR PSYLLA {F. pyvicolo) IN THE HUDSON RIVER VALLEY. 



He gave a review of the history of the species, described the methods 

 of injury and discussed the possible remedies. He finds unexpected 

 success in using the kerosene emulsion even against the mature insects. 

 He briefly discussed the life history, finding that there were two broods 

 at least. The eggs and method of oviposition were described, particular 

 attention being called to a filament or pedicel-like prolongation of the tip. 



