16 



PLANTS IN PONDFISH CULTURE. 



Table 2. — Food Content of Laegemouth Black Bass ( Microptebus sal- 

 MoiDEs), Advanced Fky and Fingeelings, in Ceetain Ponds at Faiepoet, 

 Iowa. 



a Bosmuia and Volvox association. 



6 Scapholeberis and Mougeotia association. 



c Chiefly Orthocladiusand Cricotopus sp., Tanypus decoloratus Mall, and Pseudochironomusriehardsoni 

 Mall. The identifications of chironomids were made by Dr. R. A. Mutkowski and Dr. O. A. Johannsen. 



d Mainly Dytiscid beetles. 



« From H. F. Schradieck's unpublished reports. The larvae in the food content were identified as 

 Orthocladius nivoriundus. The algse upon which these chironomids had fed consisted of 100 per cent 

 Mougeotia genufiexa. 



