REPORT OP THE ENTOMOLOGIST 91 



Four species of slugs or saw-fly larvae were conspicuous during the 

 biennium here under discussion. The rose slug (Monostegia rosae), was 

 very generally destructive during 1909, in middle and latter June, when 

 it was reported defoliating roses very extensively all over the city of 

 Lincoln and also in Omaha, Seward and other towns in southeastern 

 Nebraska. The native currant saw-fly (Prjstiphora grossnlariae), was 

 found injuring gooseberry bushes in Richardson county during latter 

 July, 1908 to such an extend that most of the leaves on many of the 

 bushes were stripped to the veins. In latter May 1909 both the currant 

 and gooseberry in Saunders and Washington counties in the vicinity of 

 Wahoo and Arlington were extensively skeletonized by the currant worm 

 (Jfeniatus ribesii), which is here illustrated on Plate 7. Another species 

 of Nematus, N. rentralis, was found by the Entomologist very seriously 

 injuring the leaves of Carolina poplar in Douglas county near Florence, 

 and as this slug is said to be several brooded annually, it may become 

 a very serious pest if it decides to attack the Carolina popular regularly. 

 The treatment for all these slugs is practically identical with that recom- 

 mended for the pear slug in last year's report. 



A comparatively new pest in this state, but one which during the 

 last two years has caused a great deal of damage to the grape crop 

 in some parts of eastern Nebraska is the grape-berry moth (Eudemis 

 botrana). This pest caused a total loss of crop in several orchards in 

 the vicinity of Lincoln during 1909. It will be found fully discussed 

 on a following page. Reports of an unidentified larva seriously de- 

 foliating grapes in Webster and Pawnee counties were received during 

 July and August of 1909, but owing to the press of other work were not 

 Investigated as fully as their importance merited. There were also re- 

 ports of cankerworm on grape from Chase county in June 1908. 



One of the most important enemies of the small fruits during the 

 years of 1908 and 1909 was the strawberry leaf-roller (Ancylis comptana) 

 which during both seasons very severely damaged many strawberry beds 

 in eastern Nebraska. There was instances of damage, however, as 

 far west as Cheirry county. This, insect was quite fully treated in Cir- 

 cular No. 7 of the office of State Entomologist, and as that circular is still 

 available it will not be discussed in detail here. The life-history of 

 this pest was quite thoroughly investigated in 1908. 



There was quite a decided diminution of injury by the rose chafer 

 (Marcrodactylus subspinosns) in the two years covered by this report as 

 Compared with the two preceding years; yet this insect was by no means 

 absent or harmless during the biennium here considered, especcially 

 during 1908, when it was reported as injuring roses, grapes, plums, 

 cherries, strawberries, currants and the foliage of various vegetables, 

 shade trees and flowers in practically all of the region included by the 

 counties of Rock, Cherry, Logan, Lincoln, Kearney, an d Hall. The rose 

 chafer is discussed in Circular No. 3 of the office of State Entomologist, 

 which may be had for the asking. 



The stalk borer (Fapaipcma nitela) was somewhat injurious in some 



