Ran — Longevity in Saturniid Moths. 

 TABLE 24. 



41 



Lot 



St. L. Promethea 1911 



St. L. Promethea 1911 



St L. Cecropia 1913 



St. L. Luna 1911 



Pike Co. Luna 1911 



Pike Co. Luna 1911 



Phila. Cynthia 1913 



N. Y. Cynthia 1913 



St. L. Polyphemus 1913 



Ga. Polyphemus 1913 



St. L. Polyphemus 1911 



Mass. Polyphemus 1913 



Total 



15 



u 



M 

 M 

 U 

 U 

 M 

 M 

 M 

 U 

 U 



u 

 u 



Class 



Al A2 A3 A6 B 



59 



30 



11 



75 



CO CI C2 C3 



11 



27 

 19 

 15 

 11 



8 

 4 

 20 

 26 

 38 

 11 

 7 

 17 



203 



Class A — The number of insects that retained eggs, and had suffi- 

 cient time to oviposit them in one day (Al), two days (A2), three 

 days (A3), six days (A6). 



Class B — The number of insects cut short by death in the midst of 

 egg-laying. 



Class C — The number of insects that lived uselessly after completely 

 ovipositing; no days (Co), one day (CI), two days (C2), three days 

 (C3). 



completely ovipositing and subsequently continuing a 

 useless life, we can only conclude that egg-laying is not 

 delicately adjusted to the economy of the species, but 

 depends upon the physiological condition of the in- 

 dividual. 



Peopoetion of Sexes. 



Darwin, in his discussion of Sexual Selection in his 

 " Descent of Man," places much importance on the pro- 

 portion of sexes. 



The published data on the proportion of sexes, espe- 

 cially of Lepidoptera, are of varying reliability since 

 they often come from the casual collector's notes. As 

 Darwin suggests, these collectors chase after the males 

 because of their prettiness, and in some species the males 



