Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Interested in a 2022 BugGuide gathering in New Mexico?

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Previous events


TaxonomyBrowseInfoImagesLinksBooksData
Photo#147223
Monarch pupa - male - Danaus plexippus - male

Monarch pupa - male - Danaus plexippus - Male
Parry Sound Ontario Canada, Ontario, Canada

Sexing Monarch pupae
The pupa is attached to the substrate by the cremaster(black rod which fifth instar larva thrusts into silk button as the skin is shed and pupa is formed). Under the cremaster are a number of rings, the abdominal sternites. Within the first ring (9th abdominal sternite) are several paired black dots. If the pupa is a female, the ring below the lowest pair of black dots has a line centered between the dots. Male pupae (like this one) lack this line.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.