Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

See Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Family Corydalidae - Dobsonflies and Fishflies

Cross between a dragonfly and stick bug?  Dobsonfly! - Corydalus cornutus Appears to be changing into what? - Chauliodes Never seen this one before. - Corydalus cornutus IMG_2714 - Neohermes concolor - female Dobsonfly Larvae--species? - Corydalus cornutus Orange-headed fishfly - Neohermes concolor Fishfly - Neohermes concolor Chauliodes pectinicornis? - Chauliodes pectinicornis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Megaloptera (Alderflies, Dobsonflies, and Fishflies)
Family Corydalidae (Dobsonflies and Fishflies)
Explanation of Names
Corydalidae Leach 1815
22 spp. in 7 genera in our area(1)(2)(3)(4), ~250 spp. in 36 genera total
wingspan up to 210 mm; in our area, BL 25-80 mm; Corydalis cornutus males can have a 14 cm wingspan and mandibles >4 cm long(1)
wings folded flat over back at rest
ocelli present
fourth segment of tarsi rounded (flattened in Sialidae)
antennae variable: may be filiform, moniliform, serrate, or pectinate
males of some species have enlarged mandibles
New World, S/SE Asia, Australasia; in our area, genera Chauliodes, Corydalus, Neohermes, Nigronia are eastern; Neohermes & Dysmicohermes in nw. NA, Orohermes & Protochauliodes along the Pacific Coast
Larvae are aquatic. Adults are terrestrial, often found near larval habitat, and come to lights
Larvae feed on aquatic insects, tadpoles, and small fish; adults either do not feed, or take small quantities of nectar and fruit juices(1)
Life Cycle
larvae go through 7―8 instars and take 2―5 years to reach maturity
Print References
Works Cited
1.Species catalog of the Neuroptera, Megaloptera, and Raphidioptera of America North of Mexico
Penny N.D., Adams P.A., Stange L.A. 1997. Proc. Calif. Acad. Sci. 50: 39-114.
2.Systematics of the dobsonfly genus Corydalus (Megaloptera: Corydalidae)
Contreras-Ramos A. 1998. Entomological Society of America, Lanham, MD. 360 pp.
3.Phylogenetic review of dobsonflies of the subfamily Corydalinae and the genus Corydalus Latreille (Megaloptera: Corydalidae)
Contreras-Ramos A. 2011. Zootaxa 2862: 1–38.
4.A New Fishfly Species (Megaloptera: Corydalidae: Neohermes Banks) Discovered from North America by a Systematic Revision
Xingyue Liu & Shaun L. Winterton. 2016. PLoS ONE 11(2): e0148319.
5.Aquatic Insects of California
Robert L. Usinger, Editor. 1956. University of California Press.