| es Trans. Acad. Sci. of St. Louis. 
of their lives cannot possibly be influenced by insufficient 
or improper food. One might naturally suspect that the 
conditions of confinement would be a factor in curtailing 
or prolonging life, but all the functions seemed to pro- 
ceed in so normal a manner that we have little reason to 
think that this is the case. Thus this material offers a 
very unusual opportunity of obtaining for this study an 
organism which passes through practically all of its de- 
velopment in its native habitat, unrestrained, and may 
finish its feeding and then may be brought together from 
various regions in the experimentor’s laboratory. Many 
animals do not have this clearly defined boundary be- 
tween adolescence and adulthood. 
The groups of material used are as follows :4 
Year Insects 
Philosamia cynthia .......... cielo een ere AGERE 1913 208 
Philosamia cynthia .......... OPR esses Ola 1913): 151 
Telea polyphemus ........... eae task Pewee See eeeS 1912 35 
Telea polyphemus ........... DG LORS. eta eo e es, 1913 92 
‘Felea: polyphemus............ Augusta, Ga: .... 5350 193 S61 
Telea polyphemus ........... Fall River, Mass;.:>.. 2... 1913 174 
Telea polyphemus ........... Augusta (cellar) ..2. 72.2: 1913 66 
osamia promethea ....... Fall River, Mass. ......... 1913 104 
Samia Californica ........... mononn-Co;,, Cal. ko se es 1912 12 
Samia cecropia ............. River des Péres (normal) 1913 220 
Samis- cecropli soo. River des Pére uffy 1913 74 
Samia ssepiia sor ERG wack ee South: St Lowis css I9tS <= 142 
oes Jew eas South St. Louis (cellar)... 1913 38 
ae Ges River des Péres (house).. 1912 69 
These notes on longevity then were made on 17 lots of 
material comprising 1897 individuals. In addition to 
this, observations were made upon reproductive phe- 
nomena in their relation to longevity. 
*+This material was obtained from Mr. J. J. Wirz of Augusta, Ga., 
Mr. Norman S. Easton of Fall River, Mass., Mr. Jesse Lund of New 
York City, and Mr. George H. Hosenfeld of St. Louis. 
