43 



from counts made by Mr. G. H. Harris, and the other from Pomona, 

 Ga., from counts made b^^ Mr. Mark Riegel. In each case twenty 

 plants were examined at an observation, and, as the corn had been 

 planted at regular intervals, plants in fresh silk could be chosen in 

 most cases. 



Table VI. — Comparative oviposition on corn throughout the season. 



CALVERT, TEX. 



Date. 



Number 



eggs per 



plant. 



! Date. 



Number 



eggs per 



plant. 



Date. 



Number 



eggs per 



plant. 



Date. 



Number 



eggs per 



plant. 



1903. 

 May 4 



0.66. 

 .00 

 .00 

 .00 



1.40 

 .40 



1903. 



June 17 



June 24 



Julyl 



July 15 



July 18 



July 22 



0.25 

 .65 



1.25 



10.30 



.75 



7.00 



1903. 



July29 



Aug. 5 



Aug. 12. 



Aug. 19 



Aug. 26 



Sept. 2 



23. 50 

 1.80 



42.00 



15.60 

 2.75 



25.25 



1903. 



Sept. 9 



Sept. 16 



Sept. 23 



Oct.3 



Oct.7 



Oct. 14 



11.80 



May 26 



May 29 



June 3 



June 5 



June 10 



4.90 



2.20 



1.10 



.55 



.50 



POMONA, GA. 



1903. 

 May 30... 

 J line 6 ... 

 June 13.. 

 June 20.. 

 June 27.. 



1 

 1.15 



2.90 



.35 



.55 



2.45 



1903. 

 July 4... 

 July 11.. 

 July 18-. 

 July 25.. 

 Aug. 1 . . 



20.40 

 7.60 

 5.50 

 2.30 

 1.65 



1903. 

 Aug. 8 . . 

 Aug. 15 . 

 Aug. 22 . 

 Aug. 29 . 

 Sept. 5.. 



1.45 



2.60 



18.20 



14.30 



16.90 



1903. 

 Sept. 12 . 

 Sept. 19. 

 Sept. 26 . 

 Oct. 10.. 

 Oct. 24. . 



9.35 

 8.85 

 6.60 

 5.10 

 .60 



These tables are quite irregular and do not show the dates of maxi- 

 mum oviposition for each generation as well as might be hoped, but 

 the data therefrom will be referred to later, in their bearing on the 

 number of generations during the season. No doubt a great propor- 

 tion of these discrepancies are due to local weather conditions and to 

 the variable maturity of the corn plants at the time the eggs were 

 counted. 



For comparison with Table V another one, compiled from records 

 made by Mr. C. R. Jones in the season of 1904, is given herewith: 



Table YII. — Oviposition on corn in silk, Texas, 1904. 



Date. 



1904. 



July 



15 



July 



24 



July 



26 



July 



30 



Aug. 



11 



Aug. 



16 



Aug. 



19 



Locality. 



Wharton, Tex 



Grossbeck, Tex 



Gilmer, Tex 



Quinlan, Tex 



Ben Franklin, Tex 



Paris, Tex 



Quinlan, Tex 



1 







! " 









a 







a 







Z< . 



25 



25 



25 



50 



20 



10 



25 



Condition. 



Silking 



5 feet; no silks 



Silking 



Tassel ing 



Silking 



....do 



...-do 



Eggs on- 



11 

 374 

 306 

 242 

 234 



259 



16 



5 



14 

 77 

 36 

 11 



1,053 



85 



456 

 338 

 265 



14 











22 



137 



148 





 

 

 137 

 236 

 184 

 81 



2,249 

 113 

 105 

 547 



1,256 

 989 

 678 



4.52 



4.2 

 10.94 



23.1 



