73 



llic diii'csrivc' tract eiitirclv ciiiptv; and of the i^!» 1 /'(iiihdn, T*) 

 had ill their aliiiiciitarv canal no traces of animal remaiiiis, being 

 either entirely empty oi' containing" some mud, gravel or algae. 

 There were then left in all 253 specimens whose digestive tract 

 contained some kind of animal remains. 



The following list gives the different kinds of animal life 

 preyed on hy dragonfly nymphs as represented in the content!? 

 of the digestive tract of the 253 Anax and Pantala nymphs dis- 

 sected. The figures in the table represent nnits, or the nnmber 

 of times a certain species or gronp appeared in the series of dis- 

 sections ; that is, each distinctive species or group of animal, as 

 classified in the table, ^vhetller fonnd in large or small qnanti- 

 ties in the contents of a single digestive tract, is given the valne 

 of one miit. 



TAI'.LK SIIOWIXG THK FINJJlXGS IN THE CONTEXTS OF THE ALI- 

 .MENTAKY CANAE OK 253 NYMPHS. 



CoLEOPTElJA 



Dytiscickie, the smallest of the three sps IG 



DlPTEEA 



CJuroiKnniclac 



C'liirononius liawaiiensis, larvae 107 



Cliiroiiutiiu-'i hawaiiensis, adults -.. 4 



(diironomid larva, undetermined 1 172 



CuJicidae 



Mosquito larvae and pupae 12 



Mosqnito adnlt - - 1 1-^ 



DuUrltopodUhie - - - 1 



Adult fly, undetermined 1 1S7 



Hemipteka 



Myodorh Idac 



Mevra<i(d(( liehroidcs White 1 



(Jervidae 



MicrorcJid rnqana White 2 3 



