32 



THE GEAPE ROOT-WORM. 



located on the hill as compared with those in the valley. In Table 

 XI is shown the time of hatching of eggs in the two named localities. 

 On the hill the eggs were one week later in hatching, mainly as the 

 result of later deposition. 



Fig. 15.— Curve showing time of egg deposition and relative abundance of eggs laid in rearing 

 cages by beetles of the grape root- worm at North East, Pa., during 1909. (Original.) 



LONGEVITY OF MALE AND FEMALE BEETLES. 



On an average the beetles have lived in captivity one month. In 

 Table VII will be found a full account of the length of life of individual 

 male and female beetles. 



Table VII. — Length of life of individual male and female beetles of the grape root-worm 

 as recorded in breeding cages at North East, Pa., during 1909. 



No. 



Sex. 



Date. 



Days. 



No. 



Sex. 



Date. 



Days. 



Emerg- 

 ence. 



Died. 



Male. 



Fe- 

 male. 



Emerg- 

 ence. 



Died. 



Male. 



Fe- 

 male. 



1 

 2 

 3 

 4 



1 



7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 



9 

 9 



I 

 i 



s 

 9 



S 

 9 

 3 

 9 



June 30 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do-... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 



...do.... 

 ...do.... 



July 3 

 ...do 



July 9 

 ...do 



July 10 



Aug. 4 

 July 22 

 July 26 

 July 27 

 July 22 

 July 21 

 Aug. 19 

 Aug. 3 

 Aug. 8 

 Aug. 1 

 Aug. 26 

 Aug. 2 

 July 22 

 July 23 

 Aug. 25 

 Aug. 9 

 Escaped. 

 Aug. 31 

 July 23 

 July 24 

 Aug. 10 

 Aug. 23 

 Aug. 27 



35 

 "'26' 

 "'22' 

 '"'56' 

 "'39' 

 ""57' 

 "'22' 

 '""54' 



"'22' 



"'27' 



"'2i' 

 "'34' 

 '"32" 

 "'33' 

 ■"23' 



"'3S' 



24 

 25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 46 



9 



i 

 ? 



9 

 s 



9 



9 

 9 



i 

 i 

 i 



1 



July 10 



'.'.'.do'.'.'.'. 

 ...do.... 

 ...do.... 

 ...do.... 

 ...do.... 

 July 11 



'July'i2' 



...do 



...do.... 

 ...do.... 

 ...do.... 

 ...do.... 



June 15 

 ...do.-.. 



July 27 

 ...do.... 

 ...do.... 

 ...do.... 



July 30 

 ...do 



Aug. 11 

 Aug. 6 

 Aug. 4 

 Aug. 14 

 Aug. 26 

 Aug. 23 

 Aug. 24 

 Aug. 22 

 Sept. 9 

 Aug. 9 



...do 



Aug. 5 

 Aug. 25 

 Aug. 6 

 Aug. 26 

 Aug. 25 



...do 



July 28 

 Aug. 26 

 Aug. 14 

 Aug. 27 

 Aug. 15 

 Sept. 22 



"'27' 



"35' 



"'44' 



'"42" 



"'28' 



"'24' 



"25' 



'"41' 

 ...... 



"'is' 

 ■"ie" 



32 

 "25 " 



"47"" 

 "45" 



"eo" 



"28" 



"44" 

 "45" 

 "4i" 

 "36" 



"si" 

 "54" 



" ' '26' 

 "'32' 



'"48" 



60 



■"2i' 



"45' 



