Eggs of elm leaf beetle, Xanthogaleruca luteola, with normal emergence holes (white) and with emergence holes of the parasite, Tetrastichus gallerucae (brown).
Eggs of elm leaf beetle, Xanthogaleruca luteola, with normal emergence holes (white) and with emergence holes of the parasite, Tetrastichus gallerucae (brown). Credit: Jack Kelly Clark
