FOOD HABITS OP MALLARD- DUCKS. 



31 



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 Insecta (Insects)— Continued. 

 Suborder RHYNCIIOPHORA (Weevils). 



P 



Unidentified 



Otiorhynchidae. 



Eudiagogus sp . . . .". 



Otiorhynchus ovatus 



Curculionidse (snout beetles). 



Unidentified , 



Conotrachelus affinis 



Conotrachelus erinaceus . . . 



Conotrachelus sp 



: Lissorhoptrus simplex 



Lissorhoptrus sp , 



Listronotus frontalis 



PacJiylobius picivorus 



Sitones hispidulus 



Tylopterus pallidus 



Calandridae (billbugs). 



Sphenophorus sp 



Scolytidae (barkbeetles) 



Anthribidse. 



Cratoparis lunatus 



Order DIPTERA (Flies). 



Unidentified adults 



Unidentified larvae 



Unidentified pupse 



Tipulidse (craneflies). 



Unidentified eggs, larvse, pupa3, and adults 



Chironomidse (midges). 



Ceratopogon sp 



Unidentified midges and larvae 



Culicidae (mosquitoes). 



Culex restuans 



Dixidse. 



Dixa sp - - 



Psychodidse (mothfiies) 



Cecidomyiidae (gall midges) 



Stratiomyiidse (soldierflies). 



Odontormjia sp .'...; 



Unidentified larvse 



Tabanidse (horseflies). 



Tabanus sp. 



Unidentified larvse 



DolichopodidsB 



Phoridae 



Syrphidse (flowerflies). 



SyrpJius sp , 



Unidentified larvaj and pupse 



Ephydridse. 



Unidentified pupae and adults 



Hippoboscidse (birdflies) ■ 



Common 

 mallard. 



1,725 



Black 

 duck. 



Southern 

 black 

 duck. 



