122 
Palingenia, Agrions and the larger dragon-flies were resorted to. A 
little vegetation had been taken with these (Ceratophyllum demersum 
and Lemna trisulea, ten per cent.) probably by accident, as this lake 
was full of aquatic plants, and it would hardly have been possible 
for a fish to catch living food from the water without getting more 
or less vegetation at the same time. A single hymenopter,—the 
only land insect found eaten by this species,—was taken from this 
stomach. <A specimen taken in June at Peoria had eaten about 
equally of minute unrecognized fish-fry and Palingenia larve. One 
caught at Ottawa in July had eaten only insects,—Corixa twenty- 
five per cent., Palingenia larve seventy-five per cent. 
Five croppies from Peoria, in October, 1878, and five from Henry, 
thirty miles above, in November, 1877, indicate that the autumnal . 
food of the species is again different. These had eaten, respectively, 
thirty-nine per cent. of small fishes,—partly Cyprinide and partly 
undetermined Acanthopteri. The remainder of their food was com-. 
posed chiefly of Palingenia larve. One October specimen had eaten 
two larvee of the large ‘“‘Hellgrammite,” Corydalis cornutus. Although 
these fishes were taken directly from the seine, and opened upon 
the spot, the food in their stomachs did not average more than a 
fourth of the quantity in those taken in early spring. The weather 
during both these months was uncomfortably cold, with falling 
snow, and the food of these specimens probably gives a correct hint 
of the winter food of the species. 
Fourteen of the above were Pomoxys nigromaculatus and twelve 
P. annularis,—one not having been determined. 
TABLE OF Foop or Pomoxys. 
= ie a Cy 
B | Seer | Bobs 19 ee eel 
a | SES || BMA) Nl eee ete 
Sate es ae eg tac p elif iets 3 
elt Decree a ee Ped eg ns | Sad) ee = 
o | -| o | @ = 0 SERS ao eas fa = 
5 i) = S me au Py ese il igs mn 
loc 5 =. <i ee = ° faa] : 
Es _ ise} F. oO . : = oD 7 
Sc Ss i] é y < rw) = ; 
= ® o : 4 Ss : : = : 
ce pe (en a Rs keh dt 
Lad é2) . . fae) . i ° 
Nos of specimens .i.0) 6 .2.2-.b) 3 6 6 5 9 1 it 1 5 5 27 
df APIS BS. ak sow e eee wt a ee Ee ee OG ee aeons BO see 39 28 15 
Acganthopteriiy 2.3 is ee ee ded cole coc ORR oo, | eee 10 08 03 
IDOISOSOMA “ci Sieroter ee eee Zhan: OL). 2:28 rae ee eee siteehell ees Saas Deere ae 
Oycloids ar aihiee Loe ot ee 4). athe ods Cee ee eee DG Wipes Bee 
Cy prinidee 72h ec eS ee es eee (4 ee Bae Lae a 2K 2 Lines ss 03 
ByDOpSiss col Ww isGot anes ede lets yee M4) scien FI eet ge AN oe ct oe Ra ee 01 
LIAN SECTS Ue pee a ee 28 28 ile; 39 90 40) 50 100 61 72 73 
LL YINEMODLEIA. 1 here ee ee Ae S642 a RS O5| oS Sesto te aie ek al ee. 
3, DMD CEL. WALVER) aie eee 28 07 Poe 2 | Seo oe ee al eee kee 01 02 0) 
COTreRN a ea ee AER te 1 OB RS aia crl aioe SIs orc ee otc a ee OL oe le ee 
CHITOnOMUST, see oeeenees 28 07 OS fo. + Rene PA ed Reed | Peg hoe (Zina 
3. Coleoptera (larvgé) .....--. ea Peete to | : OS es oie) Sa eee 03 OL 
Gyrinide se. eee ee osiactpee Per eeIRe. wok U1 Fein a Sm ee Se US) ee rate 
Dy tiahides: see ee Bers TAR oe |! de Qs oo Selphy eee care 
Bo TOMI DENA. oe ee ee 18 OSC Le OD ee | pa aes 74 Vee bee Ek 01 
COTIXG fasen eee ee eee hee 18 54. ae 01 sp | cleave 743) DOT Pek & 01 
5. Neuroptera (larve)........ (aes 8 2 39 86 85 50 75 60 67 68 
Bpoeitteridas.. ois aes (ets ve Og Can - 15h; oval. ee eeeloee aes 44]... 54 
onthe wees eee 2s (anes 15 66ers 50 7 44 67 52 
APTIONIC Bie sour ors hie Se {re ai ee oe oh eee 24 14 Buy [sid Shailh te keer Scale nee 12 
Lineivliday ch 8 hese hes pees Pea | cx 4 Some Png = tea i bee ieaey ee eA 22 PT yi caf | 01 
sito EC Ole) 20S 1) eee Prer A MeE aoe (ONE Tv. ORY PCR e i tes ee Saez Pee 1Gleetee Ol 
roo 
en 
