Ceriomicrodon petiolatus Hull, 1937.
Hull, F.M. (1937) New species of exotic syrphid flies. Psyche 44, 12-32, pl. 2.
Hull, F.M. (1937) New species of exotic syrphid flies. Psyche 44, 12-32, pl. 2.
Adapted from original description (Hull 1937).
MALE.
Face pale yellow, a wide medial vitta; gena, front, vertex, scutum and scutellum fully shining bluish black. Abdomen obscurely shining black, second tergum sub-translucent yellowish brown. Pile of scutum and pleuron microscopically short, save for white flecky pile on transverse suture and at junction of third and fourth abdominal terga.
See original description of the genus (Hull 1937) based on this species.
New description:
MALE.
Head: Face concave, slightly produced on lower half, without facial tubercle, yellow, black ventrally, with medial black vitta, yellow pilose; lunule black, rugose; frons black, pale pilose; broadly dichoptic, eye bare, with facets on inner margin orangish and with medial crease with enlarged facets; vertex distinguished from frons by sulcus; vertical triangle black, black pilose; antenna black, scape long, more than 4 times the pedicel length; basoflagellomere very long, about 1.5 to 2 times scape length; occiput black, pale pilose in a single row, black pile subdorsally.
Thorax: Scutum dark brown, with short, appressed yellow pile; postpronotum yellowish, appearing bare; scutellum short, dark brown; subscutellar fringe absent. Pleuron dark brown, anterior anepisternum and metasternum appearing bare; posterior anepisternum pilose; katepimeron bare; calypter brownish; plumula absent; halter brownish-yellow. Posterocoxal bridge complete. Wing: Wing membrane hyaline, yellow-brownish medially on anterior margin; extensively bare basally; vein R4+5 with an appendix extending into cell R4+5. Legs: Entirely dark brown.
Abdomen: Strongly petiolate, tergum 2 narrower than thorax (more than 10 times longer than broad in the narrowest medial point), terga 3 and 4 forming a club. Brown, tergum 2 lighter (orangish-brown), with short, appressed white and dark pile.
unless otherwise stated