Boisea

Kirkaldy, 1910

Boxelder Bugs

Species Guides

Boisea rubrolineata(Western Boxelder Bug)
Boisea trivittata(eastern boxelder bug)

Boisea is a small of soapberry bugs ( Rhopalidae) with a highly disjunct distribution across North America, India, and Africa. The genus contains at least three recognized , including the well-known North American boxelder : the eastern Boisea trivittata and western Boisea rubrolineata, plus the African Boisea fulcrata. The patchy, vicariant distribution pattern is considered relictual, suggesting a formerly more extensive continuous range. Members are seed-feeding primarily associated with maple family trees.

Boisea rubrolineata by no rights reserved, uploaded by Jesse Rorabaugh. Used under a CC0 license.

Boisea rubrolineata by (c) Trevor Van Loon, some rights reserved (CC BY), uploaded by Trevor Van Loon. Used under a CC-BY license.

Pronunciation

How to pronounce Boisea: /ˈbɔɪsiə/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Boisea are distinguished from other Serinethinae by their characteristic black-and-red coloration: black body with red markings including longitudinal stripes on the pronotum and red margins on the wings. The two North American species are separated geographically—B. trivittata in the eastern United States and Canada, B. rubrolineata in the western regions—with B. rubrolineata showing more prominent red longitudinal lines. From other Rhopalidae, they differ in their specific associations with Acer species and their distinctive on sunlit surfaces.

Images

Habitat

Associated with trees in the maple (Aceraceae/Sapindaceae), particularly boxelder maple (Acer negundo). Natural refugia include loose bark, hollow trees, rock crevices, and brush piles. Frequently found on sun-exposed surfaces of anthropogenic structures—especially south- and west-facing walls—during seasonal periods.

Distribution

North America (eastern and western United States, southern Canada), India, and Africa. In North America: B. trivittata ranges across most of the continental United States except California, plus Ontario, Quebec, Manitoba, and Atlantic Canada; B. rubrolineata occurs in western Canada (Saskatchewan, Alberta, British Columbia) and adjacent United States. The African and Indian distributions are highly localized and patchy.

Seasonality

emerge from sites in spring with warming temperatures. Reproductive activity and feeding occur through summer. Late summer to autumn (September–November in temperate regions): nymphs and adults cease feeding and aggregate in preparation for winter. Overwintering adults become active on warm winter days but remain largely inactive in cold conditions.

Diet

seed-feeder primarily on boxelder maple (Acer negundo) and other maple (Acer). Also feeds on seeds of ash (Fraxinus), and has been observed feeding on plum, cherry, and various other seed-bearing trees, shrubs, and vines. occasionally practice , consuming bird droppings to obtain minerals.

Host Associations

Acer negundo L. - primary Boxelder maple; primary food source for North American
Acer spp. - Various maple including silver maple
Fraxinus spp. - Ash trees

Life Cycle

Hemimetabolous development with gradual . laid on tree bark, leaves, or ground; females produce 200–300 eggs. Wingless nymphs pass through five instars, feeding on plant tissues. Nymphs have black legs, short wing pads, and exposed red ; wing pads elongate with each until covering abdomen at adulthood. One to three per year depending on geographic location and climate.

Behavior

Forms large mediated by . In spring, aggregation to trees is driven by host plant volatiles including phenylacetonitrile and 2-phenethyl acetate. In B. rubrolineata, 2-phenylethanol functions context-specifically: as an aggregation in mid-summer (originating from and male abdominal gland) and as a male sex-attractant pheromone in early spring (from ventral abdominal gland of post- males). Seasonal thermophilic : aggregates on sun-warmed surfaces to elevate body temperature. Enters diapause for winter survival.

Ecological Role

seed of maple trees. Serves as for trypanosomatid (Leptomonas podlipaevi documented in B. rubrolineata).

Human Relevance

Significant nuisance pest in residential and commercial settings. Does not bite, sting, or reproduce indoors, but large on building exteriors and interior intrusion create aesthetic problems. Crushing produces staining exudates. Exocrine secretions extensively studied in chemical research. Management involves modification (removing trees, eliminating refugia near structures) and structural exclusion (sealing entry points).

Similar Taxa

JaderaOther Serinethinae with similar seed-feeding ; distinguished by different associations (primarily Sapindus and related tropical hosts) and tropical/subtropical distribution
LeptocorisOther Serinethinae ; distinguished by Old World distribution and different plant associations
Boisea trivittata / B. rubrolineataThe two North American are distinguished by geography (eastern vs. western) and subtle differences in red coloration pattern, though they are not sympatric

More Details

Chemical Ecology

Exocrine secretions of Boisea have been extensively studied. The possess seven categories of (sensilla trichodea, basiconica, chaetica, campaniformia, coeloconica, ampullacea, and bell-mouthed) with mechanoreceptors dominating segments and concentrated on the distiflagellomere for olfaction.

Biogeographic Significance

The highly disjunct distribution across three continents (North America, Africa, India) with patchy, localized is considered a relictual pattern, making Boisea of interest for historical studies of the Serinethinae.