628 THE INSECTS OF ANCIENT AMERICA. 
it similar to a cockroach’s wing found by Professor Les- 
quereux in the Carboniferous rocks of Frog Bayou, Ar- | 
kansas, but it was put away at the time of its collection, 
and has never since been examined. Mr. Barnes has just 
discovered a wing of a similar kind in the coal formation 
of Pictou. There has been but one other instance—and 
that of very recent date—where a fossil insect has been 
found in the Carboniferous rocks of this country ; it was 
the case of a single wing, gigantic in size, peculiarly 
veined, and piehatili allied to our May-flies, which oc- 
curred in the coal-beds of Cape Breton, Nova Scotia. 
Professor Hitchcock, in his examination of the foot- 
prints in the New-Red Sandstone of the Connecticut Val- 
ley, described and figured some small tracks which he sup- 
posed to have been made by insects ; but the footprints of 
insects have been little studied, and the whole subject is so 
difficult in its nature, that it would be an arduous task to 
prove whether the tracks were made by insects or not. In 
the shales accompanying the New-Red Sandstone, however, 
quite a large number of insect remains have been found, 
all of which belong to the larva of a single species. Pro- 
fessor Hitchcock believed them to be neuropterous, but I 
think they should be referred to the Coleoptera, or bee- 
tles. The species must have lived in the water, since the 
specimens are comparatively numerous; on a small slab 
I have counted more than twenty individuals. 
Professor William Denton has obtained the largest col- 
lection of fossil insects which has yet been made in this 
country. The specimens were brought from an unin- 
habited region beyond the Rocky Mountains, near the 
junction of the White and Green Rivers, Colorado, —a 
“ne probably far richer than that of Œningen, in 
erland. _ Professor Denton was able to obtain but 
