Larva a medium sized plumosus-type; ventral tubules about equal length. Gular region dark, frontoclypeus pale. Mentum with somewhat rounded teeth; centre tooth relatively narrow, top rounded; side teeth moderately seperated.
Cytology
: 4 pairs of chromosomes with the thummi arm combination AB, CD, EF, G.
Arm G relatively short and thick with a sub-terminal nucleolus near
one end and a
Balbiani ring near the other followed by a definite constriction and
dark bands;
commonly only paired at the nucleolus. Arm B with a
nucleolus just near the centre
of the arm, also with a bulb near the end of the arm.
Polymorphism at least in arm F.
Found: New Brunswick - Kouchibouguac National Park.
Ontario - Copanspin Farm,
Dunrobin, Carleton Co.
Pools and rivers.