Characteristics, Scientific Name, Classification, Taxonomy, Territorial Claims, and pictures of the Dark-Fishfly (North America)

May 21, 2024 · 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. 1.

Nigronia serricornis has many common names including hellgrammites or fishflies or saw-combed fishflies. The genus Nigronia has one other North American member N. fasciatus and South American which lives in much of the same territory and is quite similar in all regards. [1] . They are holometabolous insects with an aquatic larval stage. [2] .

They are holometabolous insects with an aquatic larval stage. N. serricornis is a common inhabitant of woodland streams in North America and they are often the largest insect predator found in 2nd and 3rd order str.

Nigronia is a genus of megalopterous insects (dark fishflies) in the family of Corydalidae. The typical size of species in the Nigronia genus are 20-30 millimeters.

Perched on a twig near a river, probably freshly emerged. Likely N. serricornis, according to key in A Guide To The Megaloptera And Aquatic Neuroptera Of Florida (1) --the white on forewing is not very extensive. Update. I think this is a male. Examining images here on BugGuide identified to sex, females have antennae barely serrate or bead-like.

May 4, 2022 · Wings are dark brown with an off-white (not bright white) stripe across the middle of the wings. The stripe extends from outside edge (costa) to just before inner wing margin and always has several brown spots, especially on the base half of the stripe.

May 30, 2009 · All photographs and text ©2025 by Will Cook unless otherwise noted.

Nigronia fasciata is a megalopterous dark fishfly in the Corydalidae family. The typical size of N. fasciata is 22 to 28 millimeters, or 2.2 to 2.8 centimeters.

Dark fishflies (Nigronia). The typical size of species in the Nigronia genus are 2 - 3 cm.