214 IOWA ACADEMY OF SCIENCE Vol. XXV, 191S 



STOMACH CONTENTS IN DETAIL. 

 Numbers 1 to 5 inclusive caught June 27. 



1. 314 inches long. 



2 Mayfly (Ephemeridae), nymphs. 



1 caddis-fly ( Trichoptera) , nymphs. 



1 Ablabesmyia pupa. 1 



1 Tanytarsus pupa. I Chironomidae 



1 fish, % inch in length. J 



2. 3 7-16 inches long. 



3 fish, each about 1 inch in length. 



3. 2-% inches long. 



2 fish, one 1^4 inches in length, the other % inch in length. 



4. 3 1-16 inches long. 



4 Cambarus propinqus (Crustacea) 



5. 2% inches long. 



2 small nsh. 



1 Chironomus larva (Chironomidae). 



Numbers 6 to 21, caught .July 14. West shore of the lake about one 

 mile from its southern end. 



6. 6 inches long. 



5 Gammarus fasciatus (Crustacea), with parts of another. 

 25 Hyalella knicJcerbockeri (Crustacea). 

 4 Chironomus larvag. 



2 Ischnura verticaJIis nymphs (Odonata). 

 1 Chironomus pupa. 



1 Lepticellus larva (Trichoptera). 



7. 6 inches long. 



423 eyed eggs, probably those of carp or of the golden shiner, 



Abramis chrysoleucus. 



1 minnow very well digested. 



1 Cambarus propinqus. 



2 shells of Planorbis exactus, (Gastropoda). 

 1 shell of Gammartis. 



8. 6 7-16 inches long. 



1000 eggs, similar to those found in 7. 



3 Chironomus pupae. 



1 Chironomid pupa, genus unknown. 

 ■9. 61^ inches long. 



1 Planorbis parvus. 



1 Physa (Gastropoda). 



1 larva of Leptocerus ancyhis. (Trichoptera). 



Remains of one fish. 



10. 6 1-16 inches long. 



125 eggs similar to those found in 7 and 8. 



1 Cambarus propinqus l\i inches long without shell, probably 

 eaten while molting. 



11. 5% inches long. 



50 Qammarus fasciatus. 

 1 Cambarus propinqus. 



