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Sexing Monarch Pupae

Nigel Venters

Butterfly guru Nigel Venters has provided this excellend illustration which shows clearly how to tell the sex of Monarch butterfly pupae.

Sexing Monarch Pupae (illustration © Nigel Venters)

SEXING MONARCH PUPAE can easily be done with a good magnifying lens. this image has been enhanced to show the differences you need to look for. The enlargements of the anal segments to the right of the picture give a closer view of the difference.

THE MALE PUPA is at the top of the picture, it has a small dimple on the dividing edge between the anal segment and the second segment.

THE FEMALE PUPA has a distinct indented line that extends from the middle of the anal segment to the third segment. The line divides the second segment completely.


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