Veins R2+3 and M-Cu present.
(1) M-Cu intersects Cu before fork. C extends beyond R4+5. Wing generally with strong pattern of spots. Wings with macrotrichia on membrane, sometimes restricted to apex. Fourth tarsal segment cylindrical.
(2) Rear legs unusually long for midges.
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Tanypus larvae may be distinguished by the stout mandible (the apical tooth appears small in relation to the remainder of the mandible); well developed, transverse dorsomental teeth; lack of a pseudoradula; and the well developed lateral setal fringe on the body."
(3)