CONTENTS. 
vii 
Prof. Alpheus S. Packard. The life-history of Drepana arcuata, Avith remarks 
on certain structural features of the larva and on the supposed dimorphism 
of Drepana arcuata and Dryopteris rosea 483 
Prof. Alpheus S. Packard. Hints on the evolution of the bristles, spines, and 
tubercles of certain caterpillars, apparently resulting from a change from 
low-feeding to arboreal habits; illustrated by the life-histories of some noto- 
dontians (with plates in and iv, and figs, in text) 494 
General Meeting, March 5, 1890 561 
General Meeting, March 19,1890 561 
General Meeting , Aplnl 2, 1890 562 
Mr. Samuel H. Scudder. Physiognomy of the American tertiary Hemiptera. . . . 562 
Election of Members 579 
General Meeting , April 16, 1890 . 580 
Prof. N. S. Shaler. Note on the value of saliferous deposits as evidence of former 
climatal conditions 580 
Mr. Frank Leverett. Glacial studies bearing on the antiquity of man 585 ' 
Mr. M. H. Saville. The Sanborn bowlder 586“^ 
