Eurypterosyrphus macropterus (Curran, 1941):254

Eurypterosyrphus is recognized as a subgenus of Aristosyrphus, differing from the type subgenus by having a dorsomedial tubercle on the face ventrad to the antenna, profemur with a distinct spinose pad basally and usually having the apical crossvein (vein M1) straight, not processive.

Synonyms:

Ceratophya macroptera Curran, 1941: 254.

Adapted from original description (Curran, 1941).

Brown, the thorax reddish; wings brown with a broad, oblique hyaline band beyond the middle.

FEMALE.

Head: Front shining reddish brown, black below, the vertex reddish; occiput black, thinly cinereous pollinose; face and gena reddish yellow, the face with a rectangular black macula in the middle on the upper half that is separated from the antennae by a ferruginous fascia. Front and face of moderate width, the face widening slightly below, in profile slightly receding, with a low, large tubercle in the middle on the upper half; on each orbit just below the base of the antennae there is a very conspicuous tubercular swelling. Pile black. Antennae black, porrect, pedicel short, basoflagellomere a little longer than scape, gently widening from base to apex, the apex broad and obtusely rounded; arista about as long as basoflagellomere.

Thorax: pale rusty reddish, clothed with tawny pile, the scutellum simple, with thick black pile. Legs: coxae and femora reddish, the apical third to half of the anterior four femora and the apical two-thirds of the posterior pair brown; metatibiae and all the tarsi black, the anterior four tibiae brown with reddish base. Pile black, yellow on the coxae and on the bases of the femora; not long and dense. Metafemora slender on basal third, their tibiae increasing in size from base to near the apex, the basal segment of the tarsus conspicuously swollen. Wing: long and broad, brown, with a broad hyaline band extending from the costa beyond the R1 to the posterior border beyond the cell CuP, the band expanded in the R4+5 toward the apex of the wing and otherwise slightly irregular in width. Apex of cell dm rectangular; vein M1 curved sharply outward near its middle and joining the R4+5 at an angle. Calypter obscure whitish, with black border.

Abdomen: shining brownish black, long, with subparallel sides, at most slightly wider than the thorax; pile short, appressed, black; basal two sterna yellowish.

Aristosyrphus (Eurypterosyrphus) macropterus (Curran, 1941).

Curran, C. H. (1941) New American Syrphidae. Bulletin of the American Museum of Natural History 78, 243-304. [1941.08.07]

Body length: 11 mm.

Holotype female and specimens at the National Museum of Natural History are all collected in Brazil, Santa Catarina: Nova Teutonia. Species known only from Brazil.