AQUATIC INSECTS IN NEW YORK STATE 



205 



in large numbers. Most of the trout I saw taken from it in 

 1900 were rather lean, though otherwise in good and healthy 

 condition, and suggested that possibly it was becoming over- 

 stocked. 



Of the 27 stomachs obtained, one was empty, and the con- 

 tents of another were lost through the breaking of a bottle, 

 leaving 25 for study. I give below in tabular form a bare state- 

 ment of what these 25 had eaten, and follow it with an account 

 of what has been learned elsewhere of the biology of the insects 

 constituting their food. 



Table showing the stomach contents of 25 brook trout from Bone pond 



1 



'A 



1 



^1 



ii 



Q 



2 

 2 

 o 



s 



D 



a 



s 



o 



> 



s 



1 

 "5" 



g. 



B 



2 



i 

 



3 

 2 



e8 



.5 



% 



1 



■s 



1 



i 



1 

 ■5 



a 







00 



1 

 2 



'5 

 B 







s 



s 



a 



=5 



1 



28 Jnly 



30 " 

 3 Aug. 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 3 " 

 8 " 

 8 " 



15 " 



15 " 



18 " 



18 " 



Total.. 



6 



124 



14 



7 



235 



313 



15 



77 



7 



114 



36 



9 



2 



5 



351 



"2' 





2 







2 

 3 



1 

 2 



.... 



11 



44 



.... 



1 



.... 



4 













5 



.... 



340 

 2 



'32' 



1 



42 



5 



1 

 1 

 3 

 1 

 1 

















fragments 





f, 



20 



1 

 2 



— 



1 

 5 











7 













H 





1 



.... 







C) 



12 

 3 

 2 



1 



.... 



5 





& 



10 





.... 



.... 







11 











1? 



















13 



4 











1 



.... 





_ 



14 





3 



1 







({ 



15 



.... 



4 



.... 

 2 













16 







2 



'T 



250 





17 

 18 



12 

 30 



"% 



"3' 



27 

 9 



1 



.... 



10 



.... 



e 

 f 



19 











1 

 1 



— 





'0 



















'1 



174 

 245 

 310 

 132 

 244 



'■::'■ 



1 



"'i' 















■JO 



4 

 1 















9 



OS 

















')\ 



















■Jt 













1 



.... 



.... 



1 























2 462 



444 



64 



92 



10 



4 



77 



2 



7 



8 



250 



.... 



oA few brook trout scales. 



6 One little fresh-water mussel. 



cAntenna of adult $ chironomid of small size. 



dOarabid beetle claw. 



eScolytid beetle elytron and two little adult Cbironomids. 



fAchorutes sp.? (Order Thysanura). 



s Three little adult Chlronomids. 



