Comprehensive Description

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Differential diagnosis

Doesburg and Doesburg (1977) described a new genus, Loveridgeana, and gave a full diagnosis for it:

"Eyes bare; the male narrowly dichoptic, vertex at narrowest point with a deep depression between inner eye-angles, width here about 1/ 10 of width of head; ocellar triangle situated in the middle between inner eye-angles and postero-dorsal eye-angles. In the female the narrowest point between the eyes at posterior ocelli; width here somewhat less than 1/5 of width of head. Face rather prominent, hardly receding below the blunt tubercle.

Thorax pale yellow, only disc of scutum dull greyish black; scutellum darkened, subtriangular with rounded apex, subscutellar fringe absent, apex (apart from the remaining setation) with two longer bristles pointing backwards. Metascutum black. Wings longer than abdomen, densely covered with microtrichia, anal lobe moderately reduced, alula narrow and parallel sided; venation normal, vein M1 strongly bisinuous. Legs long and slender, unmodified and unornamented. Anterior portion of anepisternum bare, posterior portion sparsely invested with short pile. Katepisternum with few scattered short pile; other pleural parts practically bare. Metasternum with a few pile. Abdomen unmargined, sides strongly bent downwards, slender, especially in the male. Male genitalia: tergite 9 large, rounded; cerci small, deeply situated in cercal emargination, totally enclosed by the postero-dorsal arms of the tergite which, however are not fused together. Surstyli large; postero-dorsal lobe with short setae apically, medio-dorsal margins asymmetrically curved; antero-ventral (lower) lobe large, divided. Sternite 9 without a lingula. Superior lobe elongate. Aedeagus slender, distiphallus large.

Dorsal parts of thorax, legs, and abdomen covered with short, stiff, black setae." (adapted from Doesburg and Doesburg 1977).

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© Mengual, Ximo

Source: Flower flies (Syrphidae)

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