Clown Beetle

by Mintz
Last updated 7 years ago


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Clown Beetle

Saprinus pennsylvanicus (Clown Beetle)

CLOWN BEETLE-The saprinus pennsylvanicus has an oval or rounded, shiny metallic green colored body. The metallic green color is what sets this clown beetle apart from other clown beetles. -The body size is usually between 1/8 - 3/8'' long. -This clown beetle often occur in large numbers at any time of the year, all over the world.

FORENSIC IMPORTANCE-The stage of the beetle and other insects in the body at the time of investigation helps to determine the time of death.

OTHER FACTS-When feeling threatened, to feign death, the beetle pulls its legs in close to the body and lies motionless. -The Clown beetle has flattened legs, which can be compared to a clown’s flat shoes or loose-fitting pants.

ARRIVAL TIME-The clown beetle is noted to occur aminly in the fresh stage, or the first stage of decomposition but is also present in other stages. -The beetle will arrive within as little as 24 hours after death.-The beetle is usuaully found underneath the carcass during the day. It becomes active at night and it feeds on fly eggs, maggots and other beetle larvae.

ANATOMY-As with other insects, the clown beetle's body consits of the head, thorax and abdoman. -Has an exoskeleton that protects its internal organs-The elyrta are shortened and rectangular compared to most beetles.-The head has compound eyes(which don't move), a mandible mouthpart, and shortened antennae.

HOSTS-The Hister beetles lay their eggs in dead bodies and over a short period of time they develop into various stages. The Histeridae larvae are destructive and when they hatch they eat the maggots in the dead body.

LIFE CYCLE1) Egg2) Larvae3) Pupa4) Adult

MALE vs. FEMALE-The reproductive organs are hidden.The female's structure is modified to work as an ovipositor while the male's is adapted as a copulatory structure.-When fertilization takes place, the male leaves enough sperm in the female to fertilize all the eggs in the female's ovaries. The excess sperm is kept in a special structure called spermatheca which holds the sperm until the eggs are fully developed.


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