NEW YORK STATE MUSEUM II 



from these areas. The same conditions continued the past season, 

 though the defoliated areas were probably farther west, since the 

 moths swarmed in several cities, notably Rochester and Lockport. 



The interesting maple leaf cutter, Paraclemensia aceri- 

 f ol i ell a' Clem., attracted notice in 1919 on account of its 

 unusual abundance in the vicinity of Lake George. 



The birch leaf skeletonizer, Bucculatrix canadensii- 

 sella Fern., has been locally abundant and somewhat injurious to 

 gray birches the past season in the northeastern part of the State, 

 ranging from southern Rensselaer county north to Essex county. 

 The outbreak was less marked than in 1901, though large groups 

 of birches here and there were badly browned. 



The white pine weevil, Piss odes strobi Peck, has been 

 abundant and injurious in young plantings of white pine for sev- 

 eral years. In some instances the entire planting may be seriously 

 damaged before the trees have attained a height of 5 feet, and in 

 other cases the mischief is very restricted and confined to small 

 areas in rather large plantings. 



Miscellaneous. A compilation of the office records of the last 

 20 years indicates a probable biennial life-cycle for the large, 

 strikingly colored Say's blister beetle, Pomphopoea sayi Lee, 

 since it is numerous approximately every other year, when it 

 attracts attention on account of its feeding in swarms upon the 

 blossoms of various trees, particularly honey locust. 



The chrysanthemum midge, Diarthronomyia h, y p o - 

 g a e a Lw., is evidently becoming somewhat generally distributed 

 in the State through the shipment of infested plants. It is^ fortu- 

 nate that investigations of recent years have resulted in the formu- 

 lation of moderately successful control measures. 



Publications. The " Key to American Insect Galls " appeared 

 subsequent to the period covered by the last annual report. It is 

 the only comprehensive tabulation of these interesting deformities 

 in America and since it deals primarily with the more obvious 

 swellings or plant malformations rather than with the minute and 

 highly complex gall makers themselves, it will greatly facilitate the 

 study of the interrelations between plants and insects. Owing to 

 the great demand for this bulletin, the edition was speedily 

 exhausted. 



A number of brief popular accounts relating to the more injurious 

 pests have been prepared as heretofore and widely circulated, the 

 European corn borer on account of its paramount importance 



