The Nuptial Flight 121 
TABLE No. 2 
SAMIA SECROPIA (MUTILATED) 
bo f?4 o1e@ 
g 8 é 3 Returns 
g Fel gi ele 
3 318 | 8s 2| 2le¢t 
o 8 be a 
“ae a 3 EE (42) 2| 3 le > 
8 g a bmi § o | & ay Te B aq 3 
Slug 4 o | & tel Mie EO 8 >1 A 
£ S |g ot gig i Sel scaewt gies 3 Fa 
B 1g |ED : aS) 33| | 3 \8s Re ee ae 
3 # | 8] 3 | ss) sel &| sige = #18/3 
eisai ll § 21 8 | eel eel 8) 8 ise a Bi e's 
BE }A|ER s FIP IA Oo 1 eT e ie a mlal|e 
{34 of each an-| | 
55 10| U| 9:14 p.m. |N.E.|Yes} %| 8 “tennae off I A 
“Blk. 
58* | 12] W/ 11:15 p.m.| W |Yes| | E.| 22 mt es thd 4 
th anten- 
59 12 | W.| 11:15 p.m. | W.|Yes| /s | E.| 11] 0} 1 ae com- |}0|}....| 0 
= = 
62 15 | W.| 11:30 p.m. |No Wind|1/50| W.| 18] 0| 18 dene Bia 6 
2 normal; 5 
| car eee oe. 
See mM. i PAS cstes antennae off; 
30 p.m. |No Wind/1/50} W.| 1 Bright of; 5 
left off. 
: 41:00 pan. By [Yea }-i/e: Wet 410 Boe ee as 0 
10:50 p.m. | S. | Yes/1/25} N.| 14] 0 aa pe 
“The 
..2Normal. cue ph pesealitneias ergo me — 
**Returns—1 normal; 1 with right off; 1 with left off; 2 with half of each off. 
In proof of their delicate sensitiveness, they came in response 
to the attraction of cynthia females after all cecropias were 
dead. We find the male cecropias flying home with one half of 
each antenna off, and to a slightly less degree with all of one 
antenna amputated, but none at all returned when both 
antennae were gone. See Table 2 above. 
Experiments on Platysamia cynthia. 
The cynthia moths began to emerge on May 14; the emer- 
ence was slow at the first of the season, only 8 individuals hav- 
ing appeared up to June 6. The period of emergence for the 
majority of the population seemed to date from June 7, so by 
June 10, sufficient material was on hand to make the first ex- 
Periment. Since these moths are native of the Atlantic States, 
One may carry on work in St. Louis, in the study of long dis- 
tance flights with the assurance that the marked males will not 
be attracted by females of their own species anywhere but in 
the cages on the roof. These moths, like the other species here- 
in studied, have aborted mouth parts and require no food; this 
