Blushes of red on the abdomen of this black Ground Beetle range from bright apple to a blush of auburn.
Scaphinotus angusticollis is a Ground Beetle found in states and provinces west of the Cascade Mountain Range. It is black though many individuals have shades of red on the almond-shaped abdomen. The abdomen has a matte luster, but can appear very glossy when wet. An outer ridge along the abdomen is almost bumpy, creating a definitive edge around this part of the body. The pronotum is shaped like a crown or heart. The long head, mouth parts, and legs are black. Long legs give the body of the beetle some distance from the ground below it. They cannot fly.
The larvae of this beetle feed on snails they come across. Adult beetles feast on snails, slugs, and other creatures found on the ground, but they enjoy fruits like berries as well. The narrow head and extended mouth parts allow the beetle to reach farther into a snail's shell so it can consume the entire soft body. Look for adults under logs during the daytime in areas loaded with snails. A Narrow-collared Snail-eating Beetle might come to a fruit lure, allowing for closer observation.
Scientific Name: Scaphinotus angusticollis
Size (Adult; Length): 16mm to 24mm (0.62in to 0.94in)
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Antennae: Beetles have a pair of antennae on the head used as sensors.
Head: The head is home to the insect's eyes, antennae, and mandibles (jaws).
Thorax: Holds the three pairs of legs as well as vital internal organs.
Elytron: One of two wing cases on a Beetle that protects its wings (plural: elytra).
Wings: Appendages used for flying and kept under the elytra until needed.
Abdomen: Houses organs related to circulation, reproduction, and excretion.
Legs: Beetles have three pairs of legs located at the thorax, numbering six legs in all.