FOOD HABITS OF MALLARD DUGKS. 



25 



Table II. — Items of animal food identified in stomachs of mallard ducks and the number 

 in which found — Continued. 



Kind of food. 



Total number of stomachs examined 



Class Crustacea (Crustaceans)— Continued. 

 Order ISOPODA. 



Ujiidentified 



Oniscidae (sowbugs). 



Oniscus asellus 



Unidentified 



Asellidae. 



Asellus sp 



Mancasellus sp 



Idotheidse. 



Edotia triloba 



Erichsonella attenuata 



Idotea balthica 



Idotea -phosphorea 



Order DECAPODA (Shrimps, Lobsters, Crabs, etc.). 

 Suborder Macbuka (Shrimps, Lobsters, etc.). 



Unidentified 



Crangonidae (sand shrimps). 



Crago septemspinosus 



Palaemonidae (fresh-water shrimps). 



Palxmonetes exilipes 



Palmmonetes vulgaris 



Palmmonetes sp 



Astacidse (crawfishes). 



Canibarus angustatus 



Cambarus clarkii 



Canibarus fallax 



Cambarus virilis 



Unidentified 



Suborder Brachyura (Crabs). 



Unidentified 



Pilumnidse (mud crabs). 



Neopanope texana sayi 



Hexapanopeus angustifrons 



Portunidse (green crabs). 



Careinides mxnas 



Callinectes sapidus (edible crab) 



Ocypodidae (fiddler crabs). 



Uca sp 



Class Myriapoda. 



Diplopoda (millipeds) 



Chilopoda (centipedes) 



Class Insecta (Insects). 

 Superorder AMPHIBIOTICA (Damselflies and Dragonflies). 



Unidentified odonate nymphs and adults (few of latter) 



Order ZYGOPTERA (Damselflies). 



Unidentified nymphs 



Agrionidse 



Enallagma sp 



Common 

 mallard. 



1,725 



Black 

 duck. 



022 



Southern 

 black 

 duck. 



