Larva a small thummi-type; posterior pair of ventral tubules usually longer. Gula and frontoclypeus pale. Mentum with somewhat rounded teeth; c1 tooth relatively narrow and rounded, c2 teeth well separated and quite tall (type IV).
Cytology: 4 pairs of chromosomes with the thummi arm combination AB, CD, EF, G. Keyl pattern difficult to distinguish because of lack of pairing in many areas.
Arm G unpaired with a subterminal nucleolus and a Balbiani ring near the other end. No nucleoli in the long chromosomes. Polymorphism in arms B and F.
Arm A1:
Arm B1: No obvious puff/BR.
Arm B2: Small inversion in distal third of arm.
Arm C1: Band groups 2-4 not readily obvious
Arm D1:
Arm E1:
Arm F1:
Arm F2: differs from F1 by simple inversion about one third from distal end
Arm F3: differs from F1 by a complex inversion of distal third of arm
Click here for a partial polytene chromosome complement
Found: Ontario - 2 ml e. Morven.
Snow melt pool with thick leaves and some algal growth.
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