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Genus Nigronia - Dark Fishflies

Dark Fishfly - Nigronia serricornis Long Neck - Nigronia fasciata Fishfly larva - Nigronia Eastern Dobsonfly - Nigronia Unknown Insect - Nigronia fasciata Brown bug with white spots - Nigronia Fishfly ? - Nigronia Flying Insect - Nigronia
Classification
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
Numbers
2 spp. total, both in our area(1)
Size
20-30 mm
Identification
key to spp. in(1) (both larvae and adults)
Range
e. NA; both spp. widespread, but N. fasciata is absent from the upper Midwest and Canada(1)
Habitat
Streams and nearby vegetation. N. fasciata tends to inhabit small streams with very good water quality(1)
Season
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.