Nerax group

Classification · Synonyms and other taxonomic changes · Numbers · Identification · Works Cited

Robber Fly 7-22-09 - Efferia aestuans - male

A taste of things to come - Efferia aestuans - female

Classification

Kingdom Animalia (Animals)

Phylum Arthropoda (Arthropods)

Subphylum Hexapoda (Hexapods)

Class Insecta (Insects)

Order Diptera (Flies)

No Taxon (Orthorrhapha)

Superfamily Asiloidea

Family Asilidae (Robber Flies)

Subfamily Asilinae

Genus Efferia (Hammertails)

No Taxon Nerax group

Synonyms and other taxonomic changes

=Nerax Hull 1962

Numbers

13 spp. in our area, 65 total(1)

Identification

The following information is based on the modified Key to Eastern Species: (2) For info on the listed reference terms see the wing diagrams here.

1) - Furcation of third vein opposite or beyond base of second posterior cell;

18) - Posterior branch of third vein (R5) curved backward at tip, meeting the costa at or beyond apex of wing = (Nerax/aestuans group)

Examples:

Efferia aestuans

Efferia tabescens

Works Cited

1.	Information on robber flies, compiled by F. Geller-Grimm

2.	Herschel Raney's Random Natural Acts: Robber Flies

Contributed by Cotinis on 28 July, 2006 - 10:55pm
Additional contributions by v belov, Robert H. Biagi
Last updated 24 May, 2021 - 6:28pm

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