[58] REPORT UNITED STATES ENTOMOLOGICAL COMMISSION. 



procured them in higlier latitudes. In every instance of this kind, the locusts had been 

 so long in their stomachs that the number mentioned was counted with difficulty. 





Locality. 



Date. 



o 3 



O M 

 Hi 



03 

 P 



1 







i 



1 



2 



4 

 5 



? 



8 

 9 



D.ikota County, Nebraska 



Apr. -, 1866 

 do ... 





69 

 60 

 33 

 44 

 49 

 C.5 

 15 

 10 

 40 



Mollusks and grass. 



do. 



do. 



do 



""41""' 



20 

 33 

 11 



68 

 70 

 36 





Oct. — , 1871 

 do 



. . do . . 



do. 



do- 



do '.. 



do ... 



do 



Oct. — , 187-2 

 Oct. — , 1874 

 -. -do 



do. 



do 



do 



do- 



..do. 



do 



do 



do. 



AjSfAS BOSCHAS, Linn. 



Mallard. 



Yery abundant in Nebraska during its migrations. Many also breed here. Omni- 

 vorous apparently. Owing to its aquatic habits it does not destroy as many locusts as 

 would naturally be expected. The following list shows the food eaten in Nebraska : 



i 

 t 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 



Locality. 



Date. 



02 q 

 Hi 



00 



.a 

 



1 



i 



Dixon County Ifebraska . 



Apr. — , 1865 

 do 





46 

 28 

 10 

 12 

 40 

 37 

 21 

 8 

 11 

 47 



Mollusks, etc. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do. 



do 





Dakota County, !N^ebraska 



June — , 1865 

 do 



41 

 49 

 21 



8 



do .' 



.. do . 



do 



Lancaster County, H^ebraska -. 



Oct. - 1873 

 do 



do 



do 



do 



Oct. — , 1874 

 do 



45 

 48 

 12 



do 



do 







Anas obscuka, Gmelin. 

 DusTcy Duck ; Black Duck. 



Occurs sparingly in Nebraska. The only specimen that I obtained I purchased at a 

 meat-shop in Lincoln in October, 1874. It had 16 locusts, 30 other insects, and some 

 grass and seeds in its stomach. 



Dafila acuta, (Linn.) Jenyns. 



Pintail; Sprigtail. 



Rather common in Nebraska, especially during its migrations. In this latitude is so 

 much confined to the water that it eats sparingly of locusts. 





Locality. 



Date. 



05 J 



« 



a 



s 



Other food. 



1 



2 

 3 



4 

 5 

 6 



7 





Oct. — . 1873 

 do .-- 



13 

 2 

 20 

 13 

 17 

 11 

 6 



40 

 31 

 25 



38 



40 



Mollusks, etc. 



do. 



do. 



do. 



do. 



do. 



do. 



...".. "do 



do 



Oct. — , 1874 

 do 



do 



do 



do ..'... 



do 



do 



do 



do .. 







