Larva not a Chironomus type but small with only one pair of ventral tubules. Gula and frontoclypeus pale. Mentum with pointed teeth apart from central tooth which may be worn in the available specimen, c2 teeth little more than notches (type I); 4th laterals in line with other lateral teeth. Ventromentum with a sharply downturned inner edge and a wavy anterior margin. Frontal sclerite with a large indistinct oval pit with a large rugose area anterior to it. Pectin epipharyngis with about 12 rather irregular teeth. Basal segment of antenna relatively short, AR = 0.8, about 3.3x as long as wide; A3 relatively long, A4/A3 about 0.8. Mandible with pigmented and clearly separated third inner tooth.
Cytology: 4 pairs of chromosomes with no obvious
indication of Keyl pattern.
Chromosome 4 with a terminal nucleolus which pairs, otherwise
unpaired. No nucleolus in long chromosomes, which have
heterochromatic centromeres.
Found: Ontario -
White Lake, Three Mile Bay.
Idaho - Cataldo (Townes 1945).
Michigan - Isabella Co. (Townes 1945).
New
York - Canadaroago Lake; Milford Center; Otsego Lake (Townes
1945).
South
Dakota - Waubay (Townes 1945).
Larval description recorded in Oliver (1971), largely as the synonym E. synchrona.