Species Eburia quadrigeminata - Ivory-marked Beetle

Eburia quadrigeminata (Say)

Orig. Comb: Stenocorus quadrigeminatus Say 1827

12-25 mm (1)

Det. M. A. Quinn, 2011

e US (TX-FL-NY-MN) (2), introduced in Cuba and Argentina (3)(4)

Deciduous forests

Mostly Jun-Aug (BG data)

hosts include a wide variety of hardwoods (oak, ash, hickory, locust, chestnut, maple, elm, beech, cherry); larvae bore in heartwood (4);

adults come to bait traps and perhaps feed on rotting fruit, nectar (1)

Notorious for emerging from furniture after as many as 10-40 yrs (1)(4)

Delayed emergence of E. quadrigeminata was discovered from a birch bookcase 40 years old (Jaques 1918).

Attracted to lights (1)

Eburia haldemani LeConte might be a synonym of E. quadrigeminata (5)

E. haldemani is a taxonomic problem because it intergrades with E. quadrigeminata over much of the southern and western parts of the range of E. quadrigeminata. E. "haldemani" can sometimes be almost spotless or can be very heavily darkened in Central Texas. In the Davis Mts it again appears more normal. In east Texas, the specimens can be very large and have quite a variation in the ivory markings (eburneous spots). I consider the east Texas specimens to be E. quadrigeminata, although some consider them to be E. haldemani. (Dan Heffern, pers. comm. 2015)

Jaques, H.E. 1918. A long-life wood-boring beetle. Proc. Iowa Acad. Sci. 25: 175.

Cerambycidae Catalog

Texas Entomology - Mike Quinn, 2008