Caption: Monarch butterfly wing with scales and scent gland (Danaus plexippus). Male monarch butterfly wings have narrower wing veins plus a spot of dense scales on each hind wing. The spot is a scent gland. Males use the pheromones produced by this gland to make themselves attractive to females.
Magnification*: x7
Type: SEM
Copyright 1999 Dennis Kunkel Microscopy, Inc.
Keywords: 99771B,insect,insects,butterfly,monarch,wing,scales,milkweed butterfly,invertebrate,invertebrates,Danaus plexippus,monarch butterfly,pheromone,scent gland,SEM