REPORT OF THE STATE ENTOMOLOGIST 361 



pupae were abundant. Having completed their transformations, August 

 10 the recently emerged beetles had seriously injured the tender leaves 

 unfolding on trees that had been defoliated earlier by the first brood, 

 while the second brood of larvae had begun their destructive work. 

 September 8, they had completed their growth and many had transformed 

 to pupae. The spraying operations conducted by the civic authorities 

 at Albany against this ptst prevented satisfactory observations later in 

 the season. However, on \ isiting the neighboring city of Troy, a number 

 of bright living pupae wei e found on the remarkably late date of Novem- 

 ber 16 in the protected hollow of a tree. This should be accepted as 

 incontrovertible evidence of the occurrence of three generations annually 

 in that city. 



The slow but continued spread of this insect recorded in preceding 

 reports, was shown the present year by the appearance of the insect in 

 force on English elms in Washington park, Albany (in the central portion 

 of the city), hitherto, exempt from its attack. Another m ticeable feature 

 of the insect's presence was the marked injury to the American elms in 

 portions of the city where the pest has been established for several years. 

 They were not, as a rule, so badly affected as the English elms. The 

 greater part of the foliage of the affected American elms was partly skele- 

 tonized and injured to the extent that it presented a yellowish, unhealthy 

 appearance, though not many of the leaves dropped as in the case of 

 the more seriously injured English elms. 



Blissus leucopterus Say 



Chinch-bug 

 This insect was discovered in the autumn of 1896 on the farm of J. N. 

 Haswell, i mile to the southwest of the city of Watervlitt, N. Y., in 

 Hungarian grass and timothy. This year (1897) it appeared on the same 

 farm, in timothy, but not in clover or any other crop. It was not very 

 injurious so far as known. 



Plant lice or aphididae 



The present year has been remarkable for the abundance of various 

 aphides or plant lice on many different plants. In some cases their mjuries 

 were very serious, in others, natural enemies prevented their becoming 

 unduly abundant. 



Pemphigus populi-transversus Riley. Attention was drawn to 

 this interesting species by the characteristic galls it produced on the 



