570 REPORT OF THE COMMISSIONER OF FISHERIES. 
ous larva, small; algw; fine shell fragments with fine sand or mud, 
forming a ‘‘ grit.” 
3. Specimen from St. Clair Flats, July 13,1901. Large mass of 
remains of Ephemerida, consisting for the most part of wings and of 
more or less broken up cercopods. (Fore wings 18 mm. long; one 
of the larger of the cercopods had 25 or 26 joints.) Very few other 
parts of the insects in evidence, except small opaque bodies with ellip- 
tical outlines, which were probably the eyes. The fact that the insects 
were adults would indicate that they were taken from the surface of 
the water either at the time of metamorphosing or when blown into the 
water later.“ This one carp must have contained hundreds of these 
insects. Prof. R. H. Pettit, entomologist at the Michigan Agricul- 
tural College, kindly examined the remains of these May flies (or 
‘‘June bugs”) for me, but was unable to determine the species from 
the material in hand. 
4. Specimen 45 em.” long from North Bass Island, Lake Erie, July 
19, 1901. Chara, considerable; copepods and ostracods, numerous; 
Chironomus larvee or related forms; fragments of shells (mostly quite 
small), considerable; plant fibers. 
5. Specimen 27 cm. long from North Bass Island, Lake Erie, July 
19, 1901. Mass of food quite well digested. Much filamentous algze 
(Spirogyra recognized) and diatoms. 
6. Specimen 55.5 cm. long from Put-in Bay, July 27,1901. Chara, 
bulk of material, packing intestine full in places, mostly in small 
pieces less than 1 cm. long; May-fly larve, 1 to 14 em. long, large 
numbers; shells, broken pieces, and small bivalves 2 to 4 mm. long, 
entire; Chara and considerable other vegetable matter, some of it 
probably Piclotria, mud, fine débris, evidently bottom sediment. 
7. Specimen 33 cm. long from Put-in Bay, July 27, 1901. Chara, 
mass of the material as in No. 6; amphipods, a number of small 
Hyallela-like individuals; broken shells, a very little; vegetable matter, 
a little besides Chara. 
8. Specimen 38.5 em. long from Portage River, about 3 miles above 
Port Clinton, August 6, 1901. About 90 to 100 c.c. of rather fine, 
dark material, composed almost entirely of finely divided vegetable 
matter. <A few filamentous alge. 
9. Specimen 50.5 cm. long from Portage River, as above, August 
6, 1901. A considerable quantity of blackish ‘‘mud”, vegetable 
fragments, pieces of stem, ete., the principal constituent; one pulpy 
mass, apparently an unopened bud of some kind, possibly °° lotus” 
(Nelwmbo) or water-lily; insect larve, occasional, head only recog- 
nizable. 
aOn Lake Erie I have seen windrows of the east pupa cases of ephemerids being drifted about by 
the wind, and extending as far as the eye could follow them. If carp could have got among these at 
the time the insects were leaving they would have had abundance of food for a time. 
b Length of fishif in italics means total length—i. e., tip of snout to end of caudal fin; if in Roman 
type it is the length from tip of snout to base of caudal fin at middle. , 
