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).
June Bug. June Bug, common name for any of several beetles in the scarab family, also called June beetle. The adults are most common in June. In the northern United States, the name is applied to the numerous species that are known as May bugs in the southern United States, where they emerge earlier.