20 



BULLETIN 539, U. S. DEPARTMENT OP AGRICULTURE. 



Table VII. — Length of pupal stage of Elasmopalpus lignosellus. 



at Columbia, S. C, in 1915. 



Records obtained 



Number 

 of indi- 

 viduals. 



Date of- 



Pupa- 

 tion. 



1913. 

 Sept. 29 

 Sept. 30 



1914. 

 July 8 

 July 9 



...do 



...do..., 

 July 11 

 July 12 

 July 13 

 ...do.... 



1915. 

 Aug. 16 

 Aug. 17 

 Aug. 18 



...do 



Aug. 20 



...do 



Aug. 21 



...do 



...do.... 



...do.... 

 Aug. 23 

 Aug. 29 



...do..., 



...do.... 

 Aug. 30 

 Sept. 24 

 Sept. 25 



"Sept." 27' 

 Sept. 28 



'.'.do'.'. 

 ..do.. 

 ..do.. 

 ..do.. 

 Sept. 29 

 Sept. 30 



Oct. 



Oct. 



Oct. 



Oct. 

 ...do. 

 ...do. 

 ...do. 

 ...do. 



Oct. 

 ...do. 



Oct. 



Oct. 



Emer- 

 gence. 



1913. 

 Oct. 16 

 ...do..., 



1914. 

 July 17 

 ...do.... 

 July IS 

 July 20 

 ...do.... 

 ...do..., 

 July 21 

 July 20 



1915. 

 Aug. 25 

 ..do.... 

 Aug. 27 

 Aug. 28 



...do 



Aug. 30 

 Aug. 28 

 Aug. 29 

 Aug. 30 

 Aug. 31 

 ..do.... 

 Sept. 6 

 Sept. 7 

 Sept. 9 

 Sept. 7 

 Oct. 4 

 Oct 



Oct. 9 

 Oct. 7 

 Oct. 6 

 Oct. 7 

 Oct. 9 

 Oct. 12 

 Oct. 14 

 Oct. 15 

 ...do.... 

 Oct. 16 

 ...do.... 

 Oct. 18 

 ...do.... 

 Oct. 19 

 Oct. 20 

 Oct. 23 

 Oct. 25 

 Oct. 28 

 Nov. 1 

 Nov. 8 

 ..do.... 

 Nov. 10 



Days. 



10 



Sex. 



Female 



..do 



..do 



2 females. 

 Female... 

 ...do 



Female... 



Female. 



Female... 

 2 females. 

 Female... 



Female... 



Female... 



10. 16+ 



Female... 



...do 



...do 



...do..... 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



...do 



Female... 



...do 



2 females. 



Male. 



Do. 



1 male. 



Male. 



Do. 

 Do. 



Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 Do. 

 1 male. 



Male. 



Do. 

 Do. 



Do. 

 Do. 

 Do. 

 Do. 



Do. 

 Do. 



Do. 



Average length of pupal stage, 10.16+ days. 

 Maximum length of pupal stage, 21 days. 

 Minimum length of pupal stage, 7 days. 



MATING. 



Moths of this species usually mate the second day after emergence 

 from pupae in the summer time, and in the fall this period is somewhat 

 lengthened. Mating probably takes place at night, although the 

 moths have never been seen in coitu. A pair were found in copula 

 in a cage in the morning and upon examination it was discovered 

 that they were unable to disconnect themselves. 



