18 



GRASSHOPPERS AND OTHER INJURIOUS INSECTS OF 1911 AND 1912. 



Locality. 



Female. Male 



Meadow 6 



Weed land 17 



Roadside 11 



Pasture 10 



Pastirve 1(5 



Oat field, Edjie 11 



Oat field, 10-12 rods out in field. . 6 



Oatfield 14-16 rods in field 4 



Edg-e of oats alontj' corn field. . . .20 

 Edg'e of oats alonj^- corn field. . . .15 



10 

 12 

 8 

 12 

 10 



14 



20 



Remarks. 



Includes fll instars and vari- 

 ous species. 

 Many in 3d and 4th instar. 



Large adult M. bivittatus. 

 Lai'ge adult M. bivittatus. 



Totals 116 



101 



Further "sweepings" were made later in other locaHties. A 

 comparison of the two sexes made up of the number caught in 

 twenty sweeps is as follows : 



Locality. 



Females. 



Reber's E. field Foxhome 31 



Flax field E. of French edge of field 17 



Ten rods out in same field 11 



Weed patch two miles W. of Ferg-us Falls 19 



Totals 78 



June 26; Flats South of Foxhome, 20 sweeps of net 27 



Males. 



27 



2J. 



6 



14 



68 

 26 



It is probable from the above evidence that the proportion of 

 male and female in the species captured is very nearly equal. 



Mr. Howard (1912) made some tests with the three leading 

 injurious forms to determine what plants were eaten by grass- 

 hoppers. They may, of course, be regarded as general feeders, and 

 will turn to anything edible if forced to. While grains and 

 different varieties of grasses are preferred, the following plants, 

 shrubs and trees attract them or not as indicated. 



Mustard eaten greedily 



Sunflower " somewhat 



Chenopodium " greedily 



Dandelion " readily 



White Clover " readily 



Docks (Numex) " slightly 



Scotch Thistle " slightly 



Large leaved DogWT^od ... " readily 



Onions " readily 



Radish " slightly 



Beets " readily 



Peas " slightly 



Alfalfa " greedily 



Wild Parsnips " greedily 



Mushrooms " readily 



Burdock " slightlv 



