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Species Micropeza stigmatica

Thin Fly - Micropeza stigmatica Thin Fly - Micropeza stigmatica Stilt-legged Fly - Micropeza stigmatica Micropeza? - Micropeza stigmatica small fly - Micropeza stigmatica fly - Micropeza stigmatica Small Fly, Salt River, Maricopa, AZ. - Micropeza stigmatica
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 Micropezinae
Genus Micropeza
Species stigmatica (Micropeza stigmatica)
Synonyms and other taxonomic changes
Micropeza stigmatica van der Wulp, 1897
Identification
A predominantly tawny to reddish species with: two black bands on each femur; pale arista; and characteristic markings on the thorax.
A detailed description by Cresson (1938) appears here (under Neriocephalus stigmaticus).
From the 1972 reference by Merritt & James(1):
"This species differs from all others [in Micropeza] in having two distinct black rings on each femur, one disto-median and one sub-apical. The characteristic brown markings of the thorax (fig. 39) and the shape of the claspers (fig.40) will also aid in identification."
(But note "See Also" below.)
Range
AZ, NM, KS, TX, s. to Argentina(1). Now recorded from CA in this post.
Remarks
Although the illustration in Fig. 17 of Table 9 from "Biologia Centrali-Americana: Insecta. Diptera. Vol 2 (1883-1903)" shows substantial black on the abdomen and thorax...the description in that work states males have abdomen varying from "testaceous or rufous with yellow hind margins", to "nearly black with white margins". Moreover, the description of the synonym Neriocephalus stigmaticus in Cresson's 1938 treatment of the genus for taxa north of Mexico states this species is recognized by its "reddish color, without any blackish markings except on the halteres and legs". So the black on the the abdomen and thorax in Fig. 17 are not typical of M. stigmatica in our area.
See Also
Prior to the 1993 introduction of of the (non-native) Eurasian M. corrigiolata in far Eastern Canada, the only species in our area having black disto-median and sub-apical bands on its femora was M. stigmatica.
Works Cited
1.The Micropezidae of California (Diptera)
Merritt R., James M.T. 1973. Bull. Calif. Insect Survey 14: 1-29.