24 MONTANA BULLETIN 150 



every orchard visited in the Bitter Root Valley showed evidence of 

 the presence of this pest, although there were few instances where the 

 injury appeared to be of sufficient importance to warrant the use of 

 special control measures. 



Oblique-Banded Leaf -Roller (Archips rosaeeana Harris). Moths 

 of this species were observed on July 9th in sufficient numbers to be 

 independently responsible for considerable injury, i. e., aside from in- 

 jury caused by the fruit-tree leaf -roller (Archips argyrospila Walker). 



Fruit-Tree Leaf -Roller {Archips argyrospila Walker). See page 16. 



Fall Webworm (Hyphantria cimea Drury). The large, conspicu- 

 ous tents of this insect were in evidence on apple trees during the 

 early part of August in the Bitter Root Valley, being especially 

 numerous in some of the orchards on the east side. 



FLIES (DIPTEEA) 



Western Wheat Stem Maggot (Hylemyia cerealis Gillette). Dam- 

 age to fall and spring wheat by this insect through Hill, Chouteau, 

 Cascade, and Stillwater counties was very much more severe than for 

 any year since 1918 and many thousands of acres were either a total 

 loss or had to be reseeded. 



Cherry Maggot (Rhagotetis cingulata Loew.) and {R. fausta 0. 

 S.). During the latter part of July cherries in an orchard on the 

 east side of the Bitter Root Valley were reported to be badly infested 

 with cherry maggot. 



Greater Wheat Stem Maggot (Meromyza americana Fitch). A 

 small amount of damage caused by this insect was reported from Daw 

 son County. 



Flesh Hies (Sarcophaga kellyi Aldrich). In a few sections of 

 the State where grasshopper outbreaks occurred and these parasitic 

 flies were aided by an extensive and timely use of poisoned bran mash, 

 they increased to such numbers that by the end of the season it was 

 evident that little grasshopper trouble need be feared in 1922. 



March Flies (Bihio sp. and Bihio alhipennis Say). Larvae of 

 Mareli flies found in garden soil, beneath boards and rocks on tlu' 

 ground, and the adults clustered on the foliage of currant and goose- 

 berry l)ushes, caused many inquiries to be made as to their jiossible 

 destructiveness. 



