103 



the pupae may be destroyed by plowing the soil away from the vines 

 and back while the insect is in this stage. 



The grapevine leaf -hopper, Typhlocyba comes var. vitis., has been 

 exceedingly abundant and destructive in the Chautauqua grape belt 

 last year and early this spring. It caused a great deal of injury in 

 the fall of 1901, and present conditions are very threatening. This 

 insect is now being investigated by Professor Slingerland of Cornell 

 University. 



The apple-tree tent caterpillar, Oltsiocampa americana Fabr., has 

 been conspicuous by its absence in certain portions of western New 

 York. This is probably due, in some cases at least, to the very heavy 

 snows of the preceding winter, which allowed mice free access to all 

 roadside trees and shrubs, which were very largely girdled by these 

 michievous rodents. It thus happened that the tent caterpillars found 

 very little of their favorite food and undoubtedly many hatching on 

 these unfortunate trees must have perished. 



The forest tent caterpillar, Clisiocampa disstria Hubn., has been 

 present in comparatively small numbers and its depredations during 

 the last three or four years appear to be on the decrease. It is hoped 

 that this year will see the end, for a time at least, of serious injuries 

 by this pest. 



The fall webworm, Syphantria cunea Drury, has appeared in the 

 State unusually early and indications are that it will be more destruc- 

 tive than usual. 



OBSERVATIONS ON CERTAIN INSECTS ATTACKING PINE TREES. 



, By E. P. Felt, Albany, N. Y. 



The work of several species of Tomicus has been very apparent in 

 the Hudson River Valley during the last two or three years, and at our 

 -last meeting the writer placed on record his belief that species belong- 

 ing to this genus were responsible for the destruction of many white 

 pines in New York State. More extended observations have but 

 strengthened that opinion, and this paper is really a continuation of 

 the one published on pages 63-68 of our last proceedings. 



One pine was found which bore no signs of injury, although its 

 branches were sparse, which had been entered in large numbers by 

 Tomicus calUgrapJms Germ. The needles were rather thin August 5, 

 1901, but practically none were brown, although pitch tubes were very 

 abundant and many small masses of pitch had dropped upon the foliage 

 of surrounding shrubs. At this time most of the beetles were running 

 their primary galleries in the living bark along practically the entire 

 length of the trunk and many eggs were being laid. 



The next observation was made September 26, and then two-thirds 

 of the needles were brown and the remainder were changing rapidly. 



