Moths of North Carolina
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1 NC Records

Mompha bottimeri Busck, 1940 - Bottimer's Mompha Moth

Taxonomy
Family: MomphidaeSubfamily: MomphinaeP3 Number: 421818.00 MONA Number: 1429.00
Identification
Field Guide Descriptions: Online Photographs: MPG, BugGuide, iNaturalist, Google, BAMONA, GBIF, BOLDTechnical Description, Adults: Busck (1940)                                                                                 
Adult Markings: This is a rather distinctive species, with a pure white basal half of the wing that contrasts sharply with fawn-brown markings on the posterior half. The following detailed description is based on that by Busck (1940). The labial palp is white, but strongly marked with black on the outer sides. The antenna is dark fuscous, with very narrow white annulations and a white basal joint. The head and thorax are silvery white and smooth, and the thorax has two black spots on the posterior edge. The ground color of the forewing is also silvery white, with fawn-brown and black markings. The basal half is pure white, except for the costal edge which is black, and has two slight triangular black projections. The first is near the base, and the other at about one-fourth the wing length. A small black spot is often present just interior to the second costal triangle. The outer half of the wing is heavily overlaid with fawn-color, along with slightly raised black scales that form narrow lines and streaks. The darker apical half of the wing is partially edged by an outwardly curved streak of raised black scales. These help to delineate a somewhat curved, triangular-shaped projection of the white ground on the costal half that extends beyond the middle to about two-thirds the wing length. The only other conspicuously white areas are a small costal streak at the apical third, and a somewhat larger area on the terminal edge. At the boundary between the fawn-colored patch and the white area at the wing tip there is a longitudinal black streak that converges with a shorter oblique costal streak. The streak continues past the convergence point towards the apex as a sharp point. The fringe has a mixture of black, brown, and whitish regions, with the area below the apex often whitish. The hindwing and cilia are fuscous. The legs are black on outer sides and whitish on inner sides. The tarsi are black with narrow white annulations, and the tuft on the posterior tibia is yellowish. This is a distinctive species that resembles Mompha eloisella and M. passerella. The former is most easily distinguished by the complex pattern of black spots on the head, thorax, and basal half of the wing. Mompha passerella is slightly smaller and the curved, triangular-shaped projection of the white ground that extends beyond the middle to about two-thirds the wing length is either missing or poorly developed.
Wingspan: 9-11 mm (Busck, 1940)
Adult Structural Features: Busck (1940) provides descriptions and illustrations of the male and female genitalia.
Structural photos
Adult ID Requirements: Identifiable from good quality photos of unworn specimens.
Immatures and Development: The larvae feed on the seed pods of frostweeds (Crocanthemum), but very little is known about the larval life history. Bottimer (1942) reared a large series from the seed pods, and the adults emerged in late May and early June.
Larvae ID Requirements: Identifiable only through rearing to adulthood.
Distribution in North Carolina
Distribution: Mompha bottimeri is found in extreme southern Mississippi and Alabama, throughout much of Florida, and in coastal South Carolina and extreme southeastern North Carolina. As of 2021, we have a single record from Jones County.
County Map: Clicking on a county returns the records for the species in that county.
Flight Dates:
 High Mountains (HM) ≥ 4,000 ft.
 Low Mountains (LM) < 4,000 ft.
 Piedmont (Pd)
 Coastal Plain (CP)

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