Species 4d.C. tuberculatus Townes, 1945.

Known only from adult male and female.

Adult:
        Male:    Wing length 4.6 mm; fore LR 1.15; antennal ratio 6.0.
                      Frontal tubercles small, clypeus of medium size.
                      Middle portion of pronotum moderately broadened; mesoscutum with a strong central,
                      more or less double, tubercle.
                      Fore tarsus with with a long dense beard.
                      Blackish brown, legs brown.


Drawn from type (Townes 1945)

              Superior volsella closest to Strenzke's D(f).   Inferior volsella with simple setae, extending beyond anal point
              to about midpoint of the gonostylus, which is moderately swollen and reduces relatively markedly over posterior third.

Female:  Described only as similar to the male except for the usual sexual differences.

Larva: not known.

Cytology: not known

The strong mesoscutal tubercle is stated as an easy recognition point.  Otherwise species noted as superficially similar to C. utahensis.

Found: 'Hudson Bay Territory' - (Type locality) (Townes 1945).
          Alberta - Lesser Slave Lake (Townes 1945).
          South Dakota (Oliver et al. 1990)

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