Perry.] 48 [February 28, 
Gelechia, Holocera glanduella, raised from acorns, Hrastria 
nigritula, and other interesting insects. 
Mr. B. P. Mann exhibited drawings illustrating the exter- 
nal anatomy of the thorax of Telea polyphemus. 
The following paper was presented in substance Dee. 7,/ 
1870, but publication has unavoidably been postponed until 
the present time. 
Hints Towarps THe Post-Trertiary History or New Enc- 
LAND, FROM PERSONAL STUDY OF THE ROCKS, WITH 
STRICTURES ON Dana’s “GrOLOGY OF THE New HAVEN 
Reeion.” By Joun B. PERRY. 
A paper by Prof. Dana, on the Geology of the New Haven Re- 
gion, with special reference to the origin of its topographical features, 
has recently made its appearance in the transactions of the Connec- 
ticut Academy of Arts and Sciences. It has also appeared in a 
separate form. ‘This account, as coming from one of generally recog- 
nized ability as a geologist, is eminently deserving of notice. It has 
a special claim to attention, since it is a more than ordinarily. 
detailed exposition of a single neighborhood, which the author has 
had unusually favorable opportunities for studying, during a long se- 
ries of years, with great minuteness and care. So, again, it has pe- 
culiar interest, as indicating the waning prevalence of the ‘‘iceberg 
hypothesis,” and as being itself an evidence of the advance already 
made in the recognition and adoption of the “ glacial theory,” so ably 
propounded and defended by Prof. Agassiz as a generalization from 
his studies of the glaciers of the Alps. It is likewise deserving of 
particular regard, since it gives in miniature, due allowance being 
made for local differences, what may be presumed to be the author’s 
view of the glacier of the Connecticut, and, in fact, of what occurred 
in New England generally during the Post-Tertiary era. 
It may not therefore be amiss to take up the paper furnished by 
Prof. Dana, and the matter of it as presented by him in connection 
with other phases of the subject, in order that a more thorough un- 
derstanding of its import may be reached; that all the good there is_ 
1 See *‘ Proceedings of the Boston Society of Natural History,” vol. XIv., p- 62. 
