The insect in the photo is a brown prionid (Orthosoma brunneum), which is a species of longhorned beetle. View full size in a new window. Brown prionids are a native species that occur throughout eastern North America. I'm not sure if the specimen in the photo is a female or male. … May beetles, or June bugs, are usually brown, rusty, or black, without patterns such as spots or stripes, and rather hairy beneath. As their scientific name, Bromius obscurus, suggests, they are quite small--5mm to be exact, but can be a big nuisance to gardeners and home owners. Brown Prionid, Orthosoma brunneum, subfamily Prioninae, family Cerambycidae. They are nocturnal and are attracted to lights at night. My dad grabbed him for me one night so I could photograph him and when I let him go he was way to fast for my camera! All are brown, but variation among and within species is considerable from light, reddish browns to ones that are nearly black. Note: Please understand that that insects do not adhere to man-drawn borders on a map as such they may be found beyond the general "reach" as showcased on our website. The common, wood-boring beetle lives in moist forests. Ok, I have met this big guy on three different occasions, all outside in the middle of the night. The form of the pronotum; transverse with 3 large lateral teeth, is unique among our fauna but in any case the large size, 18-45mm, and dark body with leathery-brown elytra should be instantly recognized. Shortly after mating the female lays single cream to yellow-brown 4.8 mm eggs, of which she can produce up to 200 in her lifetime, 1.25 to 3.8 cm below the soil surface near the roots of suitable hosts. Brown beetles are obscure little insects. Beetles hunger for organic material like tree bark, plant leaves and flour. Its larvae breed in rotting, wet wood. May beetles belong to a large family of beetles called scarabs. Tweet; Description: This guy is by far the largest insect in my neighborhood. □ The brown prionid can grow to between 1–1.9 inches long (2.5–4.8 cm), so it’s a … 50 mm. Note: Please understand that that insects do not adhere to man-drawn borders on a map as such they may be found beyond the general "reach" as showcased on our website. The larvae, cream to brown in color and strongly segmented, seek out roots shortly after hatching. Starke County Indiana. Brown Prionid Explanation of Names Orthosoma brunneum (Forster 1771) Size 25-50 mm Range e. NA Habitat Moist decaying wood Remarks comes to bait & lights (); very common Works Cited 1. Among the largest is P. californicus, which … Orthosoma brunneum (Brown Prionid). Brown Prionid Beetle. Orthosoma brunneum. Insects are typically drawn to areas by available food supply, weather, environmental factors, water supply, mating patterns etc... and are quite territorial. Species ID Suggestions Sign in to suggest organism ID. 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