Eggs of elm leaf beetle, <I>Xanthogaleruca luteola,</I> with normal emergence holes (white) and with emergence holes of the parasite, <I>Tetrastichus gallerucae</I> (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