74 



Hymenoptera 

 Mynnicidae 



Fheidole megaccphala Fabr 2 



Ants, undetermined 11 13 



Odoxata 



Lihellulidae 



Pantala flavesccns Fabr., nvmphs 6 



Crustacea 



Cypris 108 



Shrimps _ 3 111 



Mollusc A 



Spiral shells 14 



Protozoa 



Euglena --. 30 



Aj^nulata 



Nereis ' J 1 



Amphibians 



Tadpoles 8 



Fish 



To]) ]\Iinnow ( () 1 



Total ■ 390 



La]N"d Insects as Food for Xympiis. 



It has been suggested that, since the Hawaiian streams and 

 other bodies of fresh water contain so very few kinds of aquatic 

 insects, and since the yellow and blue dragonflies are so numer- 

 ous in many localities, the nymphs must obtain some part of 

 their food from other sources than from the purely aquatic crea- 

 tures. This outside food is thought to be derived from the occa- 

 sional accidental dropping into the w^ater of aerial insects ; or, 

 during freshets when extensive areas of vegetation are suddenly 

 inundated, from the large numbers of insects that drown and 

 are swept intp the main water channels. 



In order to find out if the nymphs really do feed on aerial 

 forms if given a chance, a series -of experiments was carried on 

 by feeding the nym])hs, both Anax and Paiifala. in confinement 



