Seasonal abundance and life history of Fannia benjamini complex (Diptera: Muscidae) was studied in the coastal mountain community of La Habra Heights in Los Angeles County, California, with additional observations in drier, inland mountains in the Woodcrest area, Riverside County. The dominant species (>95% of fly collections) was Fannia conspicua Malloch, whereas Fannia benjamini Malloch also was present. Both species could be collected nearly year-round by netting adults (almost exclusively females) attracted to people, although F. benjamini was relatively more common in cooler weather (November–April). In La Habra Heights, adult activity peaked in June and July (both species), whereas peak activity in Woodcrest was late April through June for F. conspicua and February through April for F. benjamini. Field-collected adult females provided only water died within 2–4 d, whereas females provided with water plus a dry milk and sugar mixture survived up to 128–130 d in the laboratory. Males of F. conspicua (1–40 individuals) swarmed at heights of 0.5–4.0 m near Aptenia cordifolia (L.f.) Schwantes, an exotic, succulent, low-growing ground cover plant. Eggs of F. conspicua were deposited singly on older, decaying leaves of this plant, and adult F. conspicua emerged from Aptenia-covered areas in the field. In the laboratory, larvae of F. conspicua grazed on microbial surface films associated with Aptenia. Emergence of F. conspicua from field-collected soil–Aptenia mixtures (held in the laboratory) occurred from 1.5 to 5 mo after collection. Widespread Aptenia planting since the 1980s has probably resulted in F. conspicua becoming a severe human nuisance in some areas.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 43 • No. 2