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Monarch - Hodges#4614 (Danaus plexippus)
Photo#147223
Copyright © 2007
Jim Ellis
Monarch pupa - male -
Danaus plexippus
-
Parry Sound Ontario Canada, Ontario, Canada
Contributed by
Jim Ellis
on 21 September, 2007 - 8:38pm
Last updated 23 January, 2008 - 2:20pm
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.
…
Jim Ellis
, 23 September, 2007 - 1:57pm