1881 .] 
149 
[Putnam. 
After a heavy rain in June, 1879, I visited the spot with Dr. 
Abbott and his son. Here I noticed a small boulder of about six or 
eight inches in diameter, projecting an inch or two from the face 
of the bank about four feet from the surface of the soil above ; I 
worked the stone from the gravel in which it was firmly imbed- 
ded and drew it out. At the back part of the cavity thus made I- 
noticed the jiointed end of a stone and after working it up and 
down a few times, so as to loosen the gravel about it, I drew out 
the implement now exhibited. 
On the same day I discovered a second specimen in place eight 
feet from the surface, and Dr. Abbott’s son Richard found another 
about four feet from the surface. These three specimens were 
found within twenty or thirty feet of each other, after a heavy 
shower had made the most favorable conditions for their discov- 
ery. A long continued search on several following days, at 
various ]haces along the gravel bluff, failed of success in finding 
other specimens in place, although several were obtained from the 
talus. This shows how seldom the implements are likely to be 
found, and it may be from this cause that some unsuccessful 
hunters have doubted the occurrence of the implements in the 
gravel. Certainly the evidence that has been brought forward 
to-night will clear away all doubts as to the importance and reli- 
ability of Dr. Abbott’s discoveries and investigations, which have 
proved the former existence of palaeolithic man in the valley of 
the Delaware. 
Section of Entomology. Jan. 26, 1881. 
Mr. F. C. Bowditch in the chair. Fourteen persons present. 
Mr. Wm. Trelease noticed Hermann Muller’s last work, “Alpen- 
blumen,” composed on the general plan of his earlier book, con- 
cluding with an interesting set of tables showing proportions of 
insects of different orders which visit flowers in the low and hit'll 
lands, and list of the species observed. 
The following paper was read : 
