Insect Identification
Insect Identification

White-Spotted Sawyer Beetle - (Monochamus scutellatus)

Authored By Staff Writer | Last Updated: 5/19/2015

The White-Spotted Sawyer Beetle can be found in most evergreen forests across the continent. Their larvae bore into the trees.

One white spot at the top of the elytra (wing covering) marks this black beetle. Smaller white speckling may be visible on the eltyra (wings) as well, but it may be absent. Females have more of white speckling than males. Members of this family have a spike, or a protrusion, coming out of each side of the 'throat'. The White-Spotted Sawyer Beetle is a type of Long-Horned Beetle so one can expect them to have extraordinarily long antennae ('horns'). This species' antennae can be up to 3 times longer than their actual bodies.

This beetle prefers conifer trees like pine, spruce, fir and can be found in evergreen forests. They may also be found in areas where branches are freshly cut, like lumber yards. Females lay eggs on the tree and when the larvae hatch, they bore into the wood of dead or dying trees. Adults are active in the daytime and eat twig bark.

©2005-2016 All Rights Reserved. No Reproduction Permitted. Unauthorized use and/or duplication of this material without express and written permission from is strictly prohibited. Material presented throughout this website is for entertainment value and should not to be construed as usable for scientific research or medical advice (insect bites, etc...). Please consult licensed, degreed professionals for such information. Email corrections / Comments to InsectIdentification at Gmail dot com.

Category: Beetle
Common name: White-Spotted Sawyer Beetle
Scientific Name: Monochamus scutellatus

  Kingdom: Animalia
   Phylum: Arthropoda
    Class: Insecta
     Order: Coleoptera
      Family: Cerambycidae
       Genus: Monochamus
        Species: scutellatus

Adult Size (Length): 18mm to 25mm (0.71in to 0.98in)

Identifying Colors: black; white

Additional Descriptors: spot, antennae, flying

North American Reach (Though Not Limited To*): Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming; Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Nova Scotia; Ontario; Prince Edward Island; Quebec; Saskatchewan; Mexico

* Keep in mind that insect reach is not governed by lines on a map and therefore may appear in areas/regions/states beyond those listed above.