LONGEVITY IN SATURNIID MOTHS 193 
on 133 of these. The mean duration of life of these compares 
well (table 1) with the data for the St. Louis material for the 
same year. ! 
TABLE 10 
New York Cecropias 
DAYS | 
CLASS — | T. |MEAN 
3 | 4 5) 6/7) 8] 9 10 | 11 | 12| 13 | 14 | 
Matedeirctsts ty. (eae e mame aa relate eval feral eae | 4 20 | 7.90 
Ummnatediot eine ee ce ere are-| Da eats Salil oa) 6) || 02) | 4 ase al 56 | 8.54 
MamedbOuses Start coMseac gh eee 1| Dural <2) 8 iaeth | ea 21 | 6.62 
Wrmeitods Oana stae/ inno he koh afel Bora Sl |) We leet [te 36s ie8e25 
Aulimvatedbinsects:eae. ase sees eee: | a) Bhai ksh LET yell) i) 2 } al | AL 725 
All unmated insects...........-...... PHY 2) BS) Pei exob |) ka penile fealisss| iy ti) 928) \ (8342 
AMIBCUBS, Potente Pesan ke ade WN: Di 25) a 11510) TM) IPTG Ih by pat eon eZ Ba eS 
AOU S Seincrasins site aie syey2 aiden icte cn > 2 #1) 15.) 1G V8) 16 aaa et YY) GP GE 
Wiroletpopulation: ascent osm fy 4 err eeenie es |leOnt Loui wedaul) div) | DALE 210 pea les 1} 133 | 8.06 
CALLOSAMIA PROMETHEA 1911 
To compare the longevity of the Cecropia moth with that of 
others of the same family, some 300 cocoons of Callosamia pro- 
methea were obtained from Créve Coeur Lake region, St. Louis, 
early in the spring. These brought forth 183 imagines, 116 males 
and 67 females. .Notes on the duration of life could be made on 
170 of this number. It will be noticed (table 1) that the mean 
duration of life varies greatly in the sexes, and that they do not 
attain the age reached by the Cecropias. 
TABLE 11 
Prometheas 
DAYS | | 
CLASS : SEE ee RTE | NTA 
Be | 53> Macalsalag em seleg) adon | aa | 
TERA ey ence eee ee a oe NP OU G) | Greate | 1} 19 37 
ORTON GLH ceo es 6 20/28/2041 9 3 90 | 4.21 
Marted Ol see ne ae ees eo ee te Lae Gl i Se) By, GL) 22 | 5.18 
Wramated soars cere Nasr, Fete 8 OMIM eal) OUEST Gh la 39 | 6.54 
Allgmatedsinsects: fens ce. eee tac. cess 2) 15 | Sal Gi] Shi) ZEN ae) al ip) A eae oil 
Alitummatedunsectse- eee arrest 8 | 22] 30| 26] 17) 14) 6] 6 129 | 4.91 
LU cits plead, ke a 8 | 29/34] 25| 9] 3 | 1| 109 | 4.13 
PAIN bS} Acide ie <a een ei an uM cel) Felli Sa Reel al 61 | 6.21 
Whole population..................0--++--+ee8 10 | 37/38] 32] 20/18] 7] 7} | 1/170 | 4.82 
