WATER BEETLES IN RELATION TO PONDFISH CULTURE. 
253 
up. It is not probable that a bass thus greedy could distinguish between a dobson 
and a Hydrous larva when placed on a fishhook as bait. Accordingly, it seems 
probable that the beetle larva would make fully as successful bait as the dobson. 
EVIDENCE FROM FISH STOMACHS. 
The data in the five tables in this section on the beetle food found in the 
stomach contents of food and game fishes examined by scientific men in various 
localities present ample evidence that beetle larvae and adults constitute an impor- 
tant item of fish food. 
Food of the fishes of Illinois , by S. A. Forbes. 
Kind of fish. 
Terrestrial beetles, 
adults. 
Terrestrial beetles, 
larvge. 
U ndetermined aquatic 
adults. 
Undetermined aquatic 
larvae. 
Hydrophllidae, adults. 
1 
! 
W 
Dytiscidae, adults. 
1 
8 
1 
H 
ft 
Gyrinidae, adults. 
8 
O 
HalipJid®, adults. 
Chrysomelidse, adults. 
A hr am is chrysoleucas, roach or bream 
-f 
+ 
+ 
Ambloplites rupestris, red-eye 
+ 
+ 
+ 
+ 
Ameiurus nebulosus, common bullhead 
+ 
4- 
-F 
+ 
Ameiurus nebulosus marmoratus, marbled bull- 
head 
+ 
+ 
+ 
Aphredoderus say anus, pirate perch 
+ 
Aplodinotos grunniens , sheepshead or croaker 
! + 
+ 
Argyrosomus artedi, cisco 
-f. 
Catostomus nigricans, hog molly, stone roller 
-j- 
+ 
Chaenobryttus gulosus, warmouth bass 
+ 
Dorosoma cepedianum, gizzard shad 
4- 
Eupomotis gibbosus, common pumpkin seed.. 
+ 
+ 
Eupomotis heros, southern pumpkin seed 
+ 
+ 
Fundulus diaphanus, Menona top minnow 
+ 
+ 
Fundulus notatus, common top minnow 
4- 
4- 
+ 
Hybopsis kentuckiensis, river chub 
4- 
Hyodon tergisus, toothed herring 
+ 
+ 
+ 
Ictalurus punctatus, channel cat 
4- 
4- 
H- 
4- 
-F 
Ictiobus bubalis, small-mouthed buffalofish 
4- 
+ 
4- 
Ictiobus eyprinella, red-mouthed buffalofish 
4- 
+ 
-f- 
Ictiobus unis, mongrel buffalo fish 
4- 
+ 
Lepomis cyanellus, green sunfish 
-f 
+ 
+ 
Lepomis megalotis, long-eared sunfish 
4- 
+ 
-F 
Lepomis pallidus, bluegill 
+ 
+ 
+ 
+ 
+ 
+ 
+ 
4- 
4- 
Micropterus dolomieu, small-mouthed black bass. 
Moxostoma aureolum, common red horse 
+ 
4- 
4- 
+ 
4- 
+ 
Moxostoma inacrolepidotum , large-scaled red horse 
Notropis atherinoides, silverside shiner 
+ 
+ 1 
4- 
. 
Notropis comutus, common shiner 
+ 
-F 
Notropsis hudsonius, spot-tailed minnow 
+ 
N otropis whipplii, silver-fin shiner 
+ 
Placopharynx duquesnei, pavement-toothed red 
horse 
+ 
+ 
Polyodon spathula, spoonbill cat 
+ 
+ 
+ 
Pomoxis annularis, crappie 
+ 
4- 
+ 
Roccus chrysops, white bass 
Schilbeodes gyrinus, tadpole cat 
+ 
-f- 
Semotilus atromaculatus, horned dace 
+ 
+ 
+ 
These records by Forbes ( 1888 ) are very valuable, since they include so many 
of our food and game fish, and it is to be regretted that they do not contain more 
data on the size of the fish and the relative proportions of the various beetle foods. 
The larvae and adults of terrestrial beetles have been included, because the fish 
that will eat them will probably not refuse aquatic forms when available. This is 
