184 College of Forestry 
{| Hupomotis heros (Baird and Girard). Sunfish. 
Three genera of mollusks have been observed in the stom- 
ach contents of this sunfish (Forbes, 1888, b, pp. 512-513). 
Amnicola, taken in September. 
Planorbis, taken in September. 
Unionide, taken in September. 
Hupomotis gibbosus (Linnaeus). Pumpkinseed. 
Mollusks form about 50 per cent. of the food of this sun- 
fish in Illinois. Forbes (1880, a, p. 54) gives the per- 
centages of food at different ages as follows: 
Inrancy. 37-50 mill. long. 9 specimens examined. 
ChironomusMlanyee) Eee: 2 eee eee oe 51 per cent. 
Hmntomostracan..s sascha: “ltearhtici: ice roe 26 per cent. 
Insects esos: daphnidsty. saae..n ee eee 12 per cent. 
Hphemerid slanveel weer oe ot ae eee eee '5 per cent. 
Miscellaneous: ¢:5: .atrcprey «okt to eek oe re 6 per cent. 
MOUIMSKS 3... 2 ie aac leche oot ogc Enea eee ee trace. 
YOUTH. 50-75 mill. long. 5 specimens examined. 
ARGO SOMLS MEWNIES 5 does SHO OO SoD Se SONG S85 e 44 per cent. 
HN GOMOStTACA. aches ceo heen en tae saree are eee 18 per cent. 
AITOPENR ESTES MSV TIEN eis aoe cine oo tehecentereteees eae 14 per cent. 
Neuropberas. <gssry fo seca tyaeheerS® © kotor sere e 11 per cent. 
Youne*WmiOst srw erate rs shen eee heen: ek eee 2 per cent. 
Miscellaneous: NA siphit tam ole RS aes 11 per cent. 
In two specimens nearly three inches long the molluscan 
content rose to nearly 50 per cent., the total amount standing 
as follows: 
Molluscan (ChietvasE 27 sa) enteciti)i-t-)-1 ie 50 per cent. 
ORTONGINUSN OE. Sos fae oO eek foe few. 
AILLOTCHESTES Ee ate ein ea ae ee ahs, Salitare one 
Hphentenidplamvccesrs ena lait tensaie- eee aie Seam lene aE . 
Entomostraca seem to disappear from the food when the 
sunfish reaches this length. 
ADULT. 9 specimens examined. 
WKN eS Here se Gade OF OT MUO OES POO SO Oc 46 per cent. 
Crustacea acre nettles sires. cisgae.s cidus esasieyhcotieus cua ie 22 per cent. 
EM SOC CSS aeyecr. swe qtecotei oR Hage, seu Sete) cee beg we tecorsTaylewe 20 per cent. 
Vegetation: |<. gale wieem ibe teres moe taiteranel ot hehe rete tae 12 per cent. 
