Larvaa small to medium bathophilus-type (about 14mm); ventral tubules relatively long, anterior pair longer. Gular dark, frontoclypeus pale. Mentum with somewhat rounded teeth; c1 tooth relatively broad with c2 teeth closely applied, not well separated; 4th laterals slightly reduced.
Cytology: 4 pairs of chromosomes with the
thummi arm combination AB,CD, EF, G.
Arm G at least partly paired, with a subterminal nucleolus and a BR
about 1/3 along the chromosome. No nucleolus in the
long chromosomes. Olive in arm A obvious, puff not
usually developed in arm B.
Found: Saskatchewan - North Saskatchewan River.
Shows relationship to species 3a and 3f.