2012-3-20Current Biology

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, q( f9 H/ d( r  J) {) tVolume 22, Issue 6
2 `; w9 y, H" [On the cover: A parasitoid wasp, Torymus auratus, uses its drilling ovipositor to reach the concealed larvae of an herbivorous gall wasp within an oak gall. Like many other host-parasitoid systems, oak gall communities show “arms race” coevolution between herbivore defenses and parasitoid countermeasures. Very little is known, however, about the population history of herbivore-enemy interactions. In this issue, Stone et al. (pages 532–537) reconstruct the assembly of oak gall wasp communities across the Western Palearctic through the Pleistocene. They show that during range expansion from an eastern origin, herbivores temporarily escaped many of their parasitoid enemies. Photo © György Csóka.! W/ B4 R" F4 \+ F  t4 O
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