DRAGONFIvlBS AND DAMSElvFUES IN PONDFISH CULTURE. 



213 



Food op Gomphid Imacos, Fairport, Iowa, 1916 — Continued. 



Gomphus vastus: 



Diptera — House fly, Musca domestica . Seen picking from windov/ screen. 



Trichoptera — 



Caddisfly , undetermined In alimentary canal. 



Caddisfly, Macronema zehratum Walsh, 1862, p. 391. 



Ephemeridae — Mayfly, Hexagenia, sp Captured while eating. 



Odonata — 



Libellula luctuosa Do. 



Leucorrhinia intacta Do. 



A rgia moesta putrida Do . 



Libellulidae Needham and Hart, 1901, p. 21. 



Dragonfly tenerals In alimentary canal. 



Dromogomphus spoliatus: 



Lepidoptera — Pieris rapce Williamson, 1901, p. 119. 



Odonata — 



Heimina americana Do. 



Argia moesta putrida Do. 



Food ^schnid Imagos, Fairport, Iowa, 1916. 



Anax Junius: 

 Diptera — 



Mosquito, Culex, sp Taken from mouth. 



Black fly. Simulium, sp In alimentary canal. 



Midge, Chrironomus, sp Captured while eating. 



Midge, Ceratopogon, sp In alimentary canal. 



Syrphid fly Captured while eating. 



Undetermined flies In alimentary canal. 



Ephemeridae — 



Mayfly, CalUabetes, sp Captured while eating. 



Mayfly, Hexagenia, sp Do. 



Trichoptera — Caddisfly, undetermined In alimentary canal. 



Lepidoptera — 



Butterfly, undetermined Scales in alimentary canal. 



Moth, Tortricidae Captured while eating. 



Butterfly, Ancyloxypha, sp Do. 



Odonata — 



Leucorrhinia intacta c? Do. 



Erythemis simp licico His 9 Do. 



Argia moesta putrida ^ Do. 



Damselflies, undetermined In alimentary canal. 



/Eschna constricta: 

 Diptera — 



House fly, Musca domestica Seen picking off screen door. 



Mosquito, Culex, sp Taken from mouth. 



^schna brevisiyla: 

 Diptera — 



Mosquitoes Tillyard, 1917, p. 328. 



Gnats Do. 



Food op Libe;ivI.uud Imagos, Fairport, Iowa, 1916. 



Leucorrhinia intacta: 

 Diptera — 



House fly, Musca domestica Seen picking off window screen. 



Midge, Chironomus, sp In alimentary canal. 



Muscid fly, Sarcophaga, sp Captured while eating. 



146954°— 20 3 



