Rosalia funebris

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Rosalia funebris
Rosalia funebris resting.jpg
Scientific classification
R. funebris
Binomial name
Rosalia funebris
(Motschulsky, 1845)

The banded alder borer, Rosalia funebris, is a member of the very diverse family of longhorn beetles.


Like many others in the family Cerambycidae, R. funebris has strikingly colored wing covers (elytra). The elytra are dark with three white bands. The thorax (pronotum) is white with a large black spot. The alder borer's antennae are banded white and black. The male's antennae are longer than his body, but the female's are shorter. Long and narrow, the body of R. funebris may grow to be 38 millimetres (1.5 in).

Rosalia funebris in the second before flight


Located along western North America, Alaska through California, Washington and in New Mexico,[1] the banded alder borer may be found in the spring and summer on the bark of alder trees.

The exact reason (pheromone?) is unknown, but R. funebris is drawn to recently painted buildings and may be found, in multitudes, resting on the paint.[2]


The adult wood-boring beetles lay their eggs in a crevice of the bark on hardwood trees such as Oregon ash, New Mexico willow, and California laurel/Oregon myrtle.[1][not in citation given] From there the larvae bore into the wood. Unlike the oval (in cross-section) tunnels of the Buprestidae larva, larval Cerambycidae tunnels are circular (in cross-section) and will generally go straight for short distances between turns.[3]


Most mature Cerambycidae feed on flowers.[3] The larvae consume wood. Rosalia funebris generally lays its eggs on downed trees rather than living trees, so it is not considered a significant pest[2]


When handled or threatened R. funebris makes an audible noise similar to that of a squeaky running shoe, or a hissing sound much like air being let out of a bike tire.

Other Rosalia species[edit]


  1. ^ a b
  2. ^ a b "California first-grader gives beetle to Cornell's insect collection. Chemical in paint appears to mimic pheromone to attract beetle". Cornell University. June 9, 1997.
  3. ^ a b Charles A. Triplehorn & Norman F. Johnson (2004). Borror and DeLong's Introduction to the Study of Insects (7th ed.). Brooks Cole. ISBN 0-03-096835-6.