Female: Thoracic color slightly lighter than that of the males, base color light to medium brown,
with scutal stripes, postnotum, etc., dark brown.
Abdomen similar color to males.
Larva a salinarius type. Gular region and frontoclypeus completely brown, with darkening of the rest of the head capsule except for a pale area just posterior to the eye spots. ventral head length 309 - 342 (mean 325) µm.; head width 529 - 618 (mean 569) µm.
Head capsule smaller and darker than that of its sibling C. tardus.
Cytology: 4 polytene chromosomes with the thummi arm combination: AB, CD, EF, G.
According to Butler (1982) there are differences in arms F and G compared to C. tardus.
pri A1: 1 - 2c, 10 - 12c, 3 - 2d, 9 - 4, 13 - 19 ie. as tardus A1
pri E1: 1 - 3e, 5 - 10b, 4 - 3f, 10c - 13 ie. as tardus E1
Found: Alaska - Pond J, Barrow; Loon Pond, Prudhoe Bay (Type locality).
Description and a brief comment on the karyotype in Butler (1982).
This species is the sister species to C. tardus.