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).
1. Fireflies, also called lightning bugs, are neither flies nor bugs. Fireflies are actually beetles. Like all other beetles, they have hardened forewings called elytra, which meet in a straight line down the back when at rest.. Fireflies, also called lightning bugs, are neither flies nor bugs. Fireflies are actually beetles. Like all other beetles, they have hardened forewings called elytra, which meet in a straight line down the back when at rest.