Sixteenth Annual Report of the State 

 Entomologist of Montana 



NOTES ON INSECT PESTS OF 1918 

 THE MITES AND TICKS (ACAKINA) 



Red Spider (Tetranychus himaculatus Harvey). — Red spiders 

 were reported from several counties as injuring the foliage of rasp- 

 berries and currant bushes. 



Pear-Leaf Blister-Mite (Eriophyes pyri Pagnat). — Fruit growers 

 in the Bitter Root district each year report that the blister-mite is 

 their biggest problem in insect control. While this mite was present 

 in smaller numbers in 1918 than for several years previously, yet con- 

 siderable injury was done in orchards that did not receive the lime- 

 sulphur spray early in the spring. 



CEIOKETS AND GRASSHOPPERS (ORTHOPTERA) 



Black Cricket (Gryllus assiinilis Stew.). — During the late sum- 

 mer and early fall the common black cricket became so abundant 

 in parts of Big Horn County that it attracted considerable attention 

 from farmers, who feared the destruction of their crops. In some 

 localities the ground was black with crickets. Flax and oats were 

 badly injured by their eating into the boll and the kernel. This is 

 the first report of serious cricket injury that has come to the State 

 entomologist's office. 



Coulee Cricket {Peranabriis scabracollis Thom.V — This large, 

 repulsive-looking insect was again present in injurious numbers near 

 Ronan on the Flathead Indian Reservation. Large, migrating armies 

 of what was probably the same species were reported along the 

 southern boundary of Gallatin County. 



Grasshoppers {Melanophis sp.). — Grasshopper injury was much 

 less severe than in 1917. Great damage was done locally on many 

 farms but no outbreaks occurred over large areas. 



Yellow- Winged Grasshopper (Camnula pellucida Scud.). — 



