REPORT OF THE STATE ENTOMOLOGIST 1901 789 



[Doryphora 10-1 i n e a t a] are very numerous and destruc- 

 tive. Grubs of the Pennsylvania soldier beetle [Ohauliog- 

 nathus pennsylvanicus] were observed feeding on 

 little green lice. I also think that they feed on the bud moth 

 caterpillars, as a number were found in the foliage recently 

 occupied by them. The Hessian fly [Cecidomyia de- 

 structor] is quite abundant in many fields. Two weeks of 

 almost continuous rain have somewhat retarded the develop- 

 ment of the insects. June 7. Late sowing does not appear to 

 be a preventive for the Hessian fly in this section. One field 

 sown Sep. 10 was attacked by the fly and stooled freely, but none 

 of the plants died, while in later sown fields much of the wheat 

 was killed by the fall brood of the fly; specially was this true in 

 fields where commercial fertilizers were used, and where the 

 farmer was careless and allowed his fertilizer box to become 

 empty part way across the field. A strip of Mediterranean 

 wheat sown beside the other was very little affected by the fly, 

 while the remainder (Gold coin) is badly infested. Canker 

 worms are doing considerable damage in this vicinity. Two 

 elms near by were defoliated by them. Appletree and forest 

 tent-caterpillars are crawling about, but they are not abundant. 

 Some cherrytrees are badly infested with plant lice, and their 

 leaves are turning brown and drying up. Potato beetles are 

 quite plentiful. June 14. The plum curculio [Conotrache- 

 lus nenuphar] has " stung " much fruit, and considerable 

 of it is dropping, but for all that a full crop remains on the 

 trees. The second brood of currant worms is doing consider- 

 able damage. Caterpillars are spinning up and canker worms 

 are going into the ground. Some wheat fields in this vicinity 

 are badly infested by the Hessian fly, while others do not appear 

 to have suffered much. June 22. 



Ontario county (J. Jay Barden, Stanley) — Appletree tenr-cater- 

 pillars [Clisiocampa americana] appeared Ap. 25; 

 forest tent-caterpillars [Clisiocampa disstria] Ap. 27* 

 canker worms [?Paleacrita vernata] May 6 ; and the 

 common asparagus beetle [Crioceris asparagi] May 7. 



