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Species Rainieria antennaepes

Stilt-leg fly - Rainieria antennaepes Some kind of fly - Rainieria antennaepes wasp mimic fly - Rainieria antennaepes - male Stilt-legged Fly (Rainieria antennaepes) - Rainieria antennaepes Stilt-legged Fly - Rainieria antennaepes Rainieria antennaepes? - Rainieria antennaepes Stilt Legged Fly (?) - Rainieria antennaepes Micropezidae - Rainieria antennaepes
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Nerioidea
Family Micropezidae (Stilt-legged Flies)
Subfamily Taeniapterinae
Genus Rainieria
Species antennaepes (Rainieria antennaepes)
Synonyms and other taxonomic changes
Rainieria antennaepes (Say 1823)
Explanation of Names
Species name antennaepes refers to the forelegs held up in the manner of antennae (see Remarks).
Size
4(?)-10 mm (1)
Range
NA east of the Rockies (NS-FL to AB-TX)(2)
Remarks
Say, in the original description, states:
The anterior pair of feet, when compared with the others, are very short, and being extended before the head, considerably elevated above the plane on which the insect moves, and also being constantly vibrated, they assume the appearance of antennae. The whiteness of the anterior tarsi is very distinct and characteristic.
See Also
Taeniaptera trivittata and the southern Calobatina geometra, which both look similar. They can be distinguished from photos as follows (Chris Angell):
Eyes: Taeniaptera sp. - maroon & striped; Rainieria antennaepes - bright red, unstriped; Calobatina geometra - dark, unstriped
Body shape: Taeniaptera sp. - less slender; Rainieria antennaepes - more slender; Calobatina geometra - more slender
Wing pattern: Taeniaptera sp. - a circular, bulls-eye like pattern; Rainieria antennaepes - a triangular dark spot; Calobatina geometra - usually unmarked, sometimes like R. antennaepes
Forelegs: Taeniaptera trivittata - first tarsomere dark, remaining tarsomeres light (apical tarsomere dark in the rare southern Taeniaptera lasciva); Rainieria antennaepes - first tarsomere white, sometimes with apical tarsomere dark; Calobatina geometra - first tarsomere white, last 2-3 tarsomeres dark
Print References
Say, T. 1823. Descriptions of dipterous insects of the United States. J. Acad. Nat. Sci. Philad. 3: 9-104 (BHL link to description)