Rau—Longevity in Saturniid Moths. 41 
TABLE 24, 
63 CLASS | pa 
Lor 32 8 
eq ° 
=m | Al] A2|A3 | A6| B|Co|cl| c2\c3| & 
St. Promethea: 22550 >: 2917) 104410 O12 140) 0404-27 
St. L. Promethea ........ 1911; M ThA Ot Or Ot 14040} 07-29 
t BUrObie 1913; M O46} ha es OF 11 01-0 F116 
s ELE Mamata eb ioaest 1911) U ya i Ss feet te i: ae lh a ies Uae | 
Pike ©0) Tanne 5 4 1911| U DA OO ab id 28 8 
Pike Co. Lana. ook ics 1911) M 0} O} O} OF} 1} OF 2} 1) OF} 4 
Phils. Cynthia. sas 1913) M 8/ 5) 1) OF 5) 1] OF OF 0} 20 
Dusky Rev tM ae wens 1913) M {12} 2} 2} 0| 9} 1} 0} 0} 0} 26 
St. L. Polyphemus ...... 1913) U O42 A O20 Ah ESS 
Ga. Polyphemus ........ 1913) U ra Bean & ke eh oo ea i ae a ee ey ae | 
St. L. Polyphemus ...... 1911) U i ee a ee 1 Ge es @ ee eet ee tn Gc eee 6 
Mass. Polyphemus ...... 1913; U SA eee a bs Oo Oy at 
4 rr OGRE oe Ge rar aS Ne 59/30/11] 2|75|11| 9} 5} 1/203 
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). 
Cl —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 (C1), 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. 
ProportTION 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 Tasos 
