The red-striped oil beetle, Berberomeloe majalis is an insect in the genus Berberomeloe , found in Europe, with a typical length around 5 cm (2 in.). Its large size and the bright red bands around its body make it unmistakable; its coloration is aposematic, reflecting its ability, in common with other oil or blister beetles in the family Meloidae, to squirt a caustic liquid if attacked. In Spain however this beetle varies extensively in color. Populations of...