Ocyptamus (Atylobaccha) flukiella (Curran)
Ocyptamus flukiella is a very small species (less than 6 mm) that has the face with a very weak tubercle, eye bare, wings hyaline, metaepisternum pilose, vein M1 sinuate and metasterum bare.
Adapted from original description (Curran 1941).
Black, with yellow markings; face black with very weak tubercle; posterior legs annulate. The second abdominal segment is strongly constricted but broadens apically and the mesonotal collar is distinct. The species has a superficial resemblance to the species of Neoascia Williston.
MALE.
Head black, the face and occiput thickly cinereous-white pollinose and whitish pilose. Frontal triangle large, metallic greenish-black to bronzed, the lunule large and irregularly roughened, the dorsal section with a roughened area containing a small tubercle, the dorsal angle bordered with opaque black, the ventral angles with whitish pollen; pile black. Vertical triangle small, greenish black, black pilose, thinly brown pollinose behind the ocelli. Dorsal occipital cilia black, the upper fourth of the occiput not pollinose. Gena linear. Face receding below the very weak tubercle. Antennae brown, the basoflagellomere broadly reddish below on the basal half or more.
Thorax shining greenish-black, the anepisternum broadly yellow posteriorly. Pile cinereous but there is a more or less complete broad fascia of brown pile immediately behind the suture. Scutellum wholly blackish, without ventral fringe. Legs yellowish; metafemur with a very broad preapical brown ring, metatibia with the median third or more brown; first and last segments of metatarsi brown, the intermediate segments reddish; probasotarsomere brown basally. Pile blackish, yellow on the prolegs. Wings cinereous hyaline or with slight brown tinge; alula wide. Calypter and halter yellow.
Abdomen black, the base, broad apices of the terga and the whole of the fifth shining; second tergum with a broad, interrupted yellowish fascia, the maculae forming it concave posteriorly. Third and fourth terga each with a large, oblique lateral macula that may reach the base of the segment, and with a pair of narrow, widely separated reddish-yellow vittae on the basal two-thirds that may be partly connected with the yellow maculae; fifth segment with a pair of yellow vittae and sublateral reddish maculae on the basal half. Pile black, the sides of the first tergum with some fine white pile. Genitalia small.
FEMALE.
Facial tubercle even less developed, though still visible; front narrow, metallic greenish-black with numerous transverse ridges, the orbits white pollinose, the pile whitish. Abdomen normally marked very much as in the male but the yellow maculae on the sides of the intermediate terga are more transverse and less inclined to unite with the median vittae. Pile very short and whitish.
Body length: 5 to 6 mm (Curran 1941).
Neotropical species only known from Brazil. Type locality: Santa Catarina, Nova Teutonia.