Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

larvarum or mella

Fly - Exorista - female Fly - Exorista Tachinidae --? - Exorista - female Tachinidae --? - Exorista - female Tachinidae --? - Exorista Tachinidae --? - Exorista Tachinidae --? - Exorista Tachinidae --? - Exorista - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Oestroidea
Family Tachinidae (Parasitic Flies)
Subfamily Exoristinae
Tribe Exoristini
Genus Exorista
No Taxon larvarum or mella
The native species Exorista mella and the introduced Exorista larvarum are very similar. These species have 4 postsutural dorsocentral bristles. Other species of Exorista in North America have 3. These species have no discal bristles on abdominal segments 3 and 4; some other species do.

Exorista larvarum is an important parasite of the Gypsy Moth (Lymantria dispar). E. mella larvae are unable to penetrate the caterpillar's skin.