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).
Save. Lightning bugs, also called fireflies or lightning beetles, are known for their ability to blink their taillights on and off. Even the larvae of these beetles have small spots that shine and these organisms are commonly called glowworms as well.Lightning bugs are beneficial insects that eat other insect larvae, snails and slugs. Some adult soldier beetles resemble adult lightning bugs, while sowbugs or pillbugs look like lightning bug larvae.n adult lightning bug (Photinus spp.) is a winged beetle that measures 7/16 to 9/16 inch long. It has a dark-colored soft body with brownish-black wing covers, edged with a light yellow to yellowish orange stripe. A section of the thorax, called the pronatum, extends over the lightning bug's head.