1 Digitalis medicines control irregular heart rhythms (called arrhythmias) by slowing the signals that start in the sinoatrial (SA) node. 2  This, in turn, reduces the number of signals that travel through the atrioventricular (AV node). 3  Fewer signals mean fewer arrhythmias.
June beetle (genus Phyllophaga), also called May beetle or June bug, genus of nearly 300 species of beetles belonging to the widely distributed plant-eating subfamily Melolonthinae (family Scarabaeidae, order Coleoptera).
, Entomologist. Fireflies or Lighting bugs are actually beetles in the family Lampyridae. Their larvae are called glowworms and they likely glow to warn predators that they taste bad, as they tend to be chemically defended. Not all adult fireflies glow. Most of those that do, glow to find a mate.