26 



BULLETIN 720, U. S. DEPARTMENT OF AGRICULTURE, 



Table IJ . — Items of animal food identified in stomachs of mallard duels and the number 

 in which found — Continued. 



Kiiid of food. 



Total number of stomachs examined. 



Class Insecta (Insects)— Continued. 

 Order ANISOPTERA (Dragonflies). 



Unidentified nymphs and adults 



.iEschnidfe. 



Gomphlnse 



JEshna calif ornica 



JEshna sp 



A nax Junius 



Dromogomphus sp 



Ubellulidse. 



Macromia illinoensis 



Pachydiplax longipennis 



Tetragoneuria sp 



Unidentified 



Order AGNATHA (Mayflies). 



Unidentified mayflies and nymphs 



Order DERMAPTERA (Earwigs). 

 A nisolabis maritima 



Order ORTHOPTERA (Grasshoppers; etc.). 



Unidentified Orthopera and eggs 



Tettigidse. 



Nomotettix sp 



Tettix ornatus. 



Unidentified 



Acridiidse. 



Melanoplus hivittatus 



Melanoplus sp 



Schistocerca americana 



Unidentified 



LocustidiB (green grasshoppers) 



Grylhdae (crickets). 



Nemobius sp 



Order PALEOPTERA (Roaches). 

 Unidentified roaches and eggs 



Order MALLOPHAGA (Bird Lice). 



Unidentified. 



Order HETEROPTERA (True Bugs). 



Unidentified 



Corixidaj (water boatmen). 



C'orixa abdominalis 



Corixa harneii 



Unidentified 



Notonectidie (back-swimmers). 



Notonecta insulata 



Notonecta sp 



Plea utTiola 



Nepidfp (water scorpions). 



Ranatra sp 



Common 

 mallard. 



1,725 



Black 

 duck. 



Southern 

 I black 

 duck. 



I 



