Larva a medium to large plumosus-type; ventral tubules relatively long, posterior pair longer. Gular region dark, frontoclypeus darkened. Mentum (Fig. c) with pointed teeth; c1 tooth broad with short parallel sides, c2 teeth relatively well separated (type II); 4th laterals slightly reduced (type I-II). Ventromentum (Fig. d) with inner margin downturned. Pecten epipharyngis (Fig. a) with about 16 somewhat variable teeth. Antenna (Fig. b) with relatively long basal segment. Mandible (Fig. e) with third inner tooth slightly reduced and pale.
Cytology: 4 pairs of short chromosomes with the
thummi arm combination AB, CD, EF, G.
Arm G cloudlike with an almost terminal nucleolus and only one or 2
obvious bands; often paired only at the nucleolus. No
nucleoli in other chromosomes.
Arm A1: 1 - 2c, 10 - 12, 3 - 2d, 9 - 4, 13 - 19
i.e. as holomelas, tardus, etc.
Arm E1: 1 - 3e, 5 - 10b, 4 - 3f, 10 - 13
i.e. as cingulatus,
tardus & sp. 3b.
Arm F1: 1 - 10, 17 - 11, 18 - 23
i.e.
as in cucini, tardus & tenuistylus.
Click here for the polytene chromosomes.
Found: Wisconsin - Friebauer Lake, Bayfield Co.
Lakes.
This corresponds to Species 18 of Wülker.