The number of ovarioles of the Colorado potato beetle,Leptinotarsa decemlineata (Say), in four North Eastern North American localities

The number of ovarioles of the Colorado potato beetle averages 32.04 ± 0.27 per ovary in North Eastern North America, seven more than previously reported for that area. It differs between the left and right ovary in 84% of beetles. The lack of significant differences among beetle populations from Maine, New Brunswick, New York and Ontario suggests that there is no geographical variation within the area studied. There could, however, be variation over a larger area: the number observed is similar to the one for Belgium and Poland but higher than the one for Russia.