Hellgrammites
Hellgrammites are the fearsome predatory larvae of the dobsonflies. Unlike mayflies, caddisflies, and stoneflies, their life cycle does not include specific points of vulnerability, but the larvae end up in the drift often enough to be important to trout. (Note: Some would say that technically only larvae of the Corydalus genus are hellgrammites, but anglers widely use the term for all larvae in the family.)
This common name refers to only one family.
Insect Family Corydalidae
These are often called Hellgrammites.
Hellgrammites are the vicious larvae of the Dobsonflies, some of the only trout stream insects which pose a biting threat to the angler. The pincers of the adult are even more frightening that the larva's, and they're aggressive enough to use them once in a while.
This family's life cycle does not create good dry fly opportunities, but the larvae may be eaten by trout year-round. They are a secret told only by stomach samples of well-fed trout.
This family's life cycle does not create good dry fly opportunities, but the larvae may be eaten by trout year-round. They are a secret told only by stomach samples of well-fed trout.
Corydalus (Dobsonflies) Hellgrammite Larva
View 27 Pictures
View 27 PicturesRegion: Poconos
Collected May 29, 2007
Added Jun 4, 2007
Male Nigronia serricornis (Fishfly) Hellgrammite Adult
View 10 Pictures
View 10 PicturesRegion: Poconos
Collected May 29, 2007
Added Jun 4, 2007
See 6 more specimens...
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