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Fall Fund Drive


Genus Nigronia - Dark Fishflies

Dark Fishfly - Nigronia Dark Fishflies Mating? - Nigronia fasciata - female odd insect - Nigronia fasciata - male Nigronia Nigronia serricornis Dark Fishfly - Nigronia fasciata White and Black somethingfly - Nigronia Caddisfly or fish fly ? - Nigronia
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Megaloptera (Alderflies, Dobsonflies, and Fishflies)
Family Corydalidae (Dobsonflies and Fishflies)
Subfamily Chauliodinae (Fishflies)
Genus Nigronia (Dark Fishflies)
Explanation of Names
Nigronia Banks 1908
2 spp. total, both in our area(1)
20-30 mm
key to spp. in(1) (both larvae and adults)
e. NA; both spp. widespread, but N. fasciata is absent from the upper Midwest and Canada(1)
Streams and nearby vegetation. N. fasciata tends to inhabit small streams with very good water quality(1)
in NC, May at lower elevations, May-July at higher elevations(2)
Life Cycle
Emergence of adults may be synchronized. Adults are diurnal (seen flying near streams) and also nocturnal, so come to lights. Eggs are laid on the underside of vegetation overhanging a stream. Larvae are aquatic, predatory. Perhaps take three years to mature in more temperate areas, such as West Virginia. Pupation occurs in earthen cells on the edge of streams.
Works Cited
1.A guide to the Megaloptera and aquatic Neuroptera of Florida
Rasmussen A.K., Pescador M.L. 2002. Florida Dept of Environmental Protection, Div. Water Resource Management. Tallahassee. iii+45 pp.
2.Insects of North Carolina
C.S. Brimley. 1938. North Carolina Department of Agriculture.