Oriental Chironomus: C. mongolfegeus

Chironomus mongolfegeus Sasa & Suzuki 1997

Adult

Males:
Wing length 3.35-3.40 mm; width 0.27-0.29 mm.  Cross vein darkly pigmented, squamal fringe 26.
Ground color of scutum yellow, vittae largely dark brown, margins black; scutellum yellow; postnotum black.  Femora largely yellow with distal portion brown; tibiae brown over basal 1/3 and distal portion but yellow in middle; tarsi I yellow for basal half, then brown; other tarsal segments brown.  Abdominal tergites largely brown, II-VIII with a yellow band along caudal margin.
Head: Frontal tubules prominent (below).  AR 3.61-3.94.  Clypeal setae 20-40.
Thoracic setae: Acrostichal 14-18; Dorsocentral 22-34; Prealar 6-9; Scutellar 25-34.
LR1 1.37-1.48; LR2 0.53-0.55; LR3 0.70-0.71. BR1 1.4-2.1; BR2 1.8-5.3; BR3 1.8-4.0.

Antenna and terminalia of C. mongolfegeus from Sasa and Suzuki (1997)

TIX with about 8 medial setae.
Anal point stout, widest at base and slightly constricted in the middle; Superior volsella of the E-type of Strenzke (1959); Inferior volsella with recurved setae (shown as simple) over distal half, reaching just to end of anal point; gonostylus moderately swollen and narrowing markedly at tip; with 7+1 setae at end.

Female: Not known

Pupa, Larva and Cytology: Not known

Somewhat related to C. salinarius and C. mongolheus (De Geer) (i.e. C. plumosus) but differs in details of the hypopygium.

Found: Mongolia - (Type locality) Karakorum.

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