TWENTIETH REPORT OF THE STATE ENTOMOLOGIST 29 



with inquiries regarding its habits. The caterpillars grow to a large 

 size and require a good deal of food. Their presence on currant bushes 

 sometimes alarms the gardener. 



The Mediterranean Flour Moth (Ephestia kuehniella Zell). This 

 is probably the leading granary and flour mill pest of the Northwest. 

 It sometimes gets into stored cereal products in grocery stores and 

 warehouses. The caterpillars feed on all kinds of granary products 

 and their webs running through the cereal clot it together. We have 

 known it to do serious damage to bolting cloth in flour mills. It was 

 reported repeatedly during 1924. 



The Sugar Beet Webw r orai (Lo.costege sticticalis Linn.). In recent 

 years this species has been present in injurious numbers in some part 

 of the State practically every year, though formerly it was little 

 known excepting occasionally in sugar beet fields. Primarily a pest 

 of sugar beets, this insect is also the cause of much injury to gardens 

 and alfalfa. It feeds on many weeds and sometimes destroys the 

 Russian thistle over large areas. 



The Army Cutworm (Chorizagrotis auxiliaris Grt.). This im- 

 portant pest of cereals in Montana appeared in one locality, namely 

 Judith Basin, in 1924. In earlier years this species has produced wide- 

 si 'read devastation in Montana. 



The Strawberry Leaf-roller (Ancylis comptana Frohl.). Growers 

 v\' strawberries complained repeatedly of the ravages of this insect 

 in 1924; and the fact that the ever-bearing straw r berry is now so pop- 

 ular makes it more difficult than formerlv to control the insect, for in 

 former years the remedy Avas to mow the patch after the crop had 

 been removed and burn over the field, thereby destroying the insect. 

 This can not be done if a second crop is to be removed and w r e are re- 

 duced to spraying with arsenicals in advance of the removal of the 

 first crop. This species also attacks blackberries and raspberries. 



The Fruit-Tree Leaf -Roller (Archips argyrospila Walker). This 

 prime pest of the apple tree which has been so prominent in recent 

 years in the Bitter Root Valley still continues its attacks, though in 

 somewhat reduced numbers in 1924. 



Bees. Ants and Wasps (Hymenoptera) 

 The Wheat Stem Sawfly (Cephus cinctus Nort.). This pest of 

 wheat, discovered in recent years in the extreme northeastern corner 

 of Montana and later in the northern part of Stillwater County, was 



