North American Chironomus: C. tuxis

Species 4o. Chironomus tuxis Curran, 1930

Adult

Male terminalia of C. tuxis.
Drawn from type by Townes 1945 (left) and Sublette 1966 (right).

Male (from Townes 1945; Sublette 1966, Sæther 2012): Wing length 3.4 mm (type 3.46 mm, VR1.02); fore LR 1.63 (type 1.67); antennal ratio 3.2-3.8 (type 3.92).
Body moderately slender.
Frontal tubercles small, clypeus small.
Middle portion of pronotum hardly at all broadened.
Fore tarsus without a beard.
Blackish brown and pruinose brown, legs brown towards their apices, pale towards the base; 6-8 sensilla chaetica on mTa1, 7 on hTa1
Acrostichal setae in single staggered row; dorsolaterals in double staggered rows; 5 prealars; 1 supra-alar; scutellars with 14-16 setae strewn in anterior row, 12 erect in posterior row.
Leg proportions:

	Fe	Ti	Ta1	Ta2	Ta3	Ta4	Ta5	LR	F/T	BR
PI	780	700	1170	580	440	380	160	1.63-1.67	1.11	absent
PII	780	780	460	260	200	120	80	0.59	1.00
PIII	900	920	720	410	300	180	90	0.78	0.98

Abdominal segments without the yellowish apical segmental bands seen in C. riparius. Tergite IX figured with about 10 setae in a single pale area.
Genitalia similar to those of the C. decorus-group, but D(e)-type superior volsella shorter and stouter. Anal point approximately parallel sided with slightly rounded distal end. Inferior volsella reaching about to end of anal point and midpoint of the gonostylus which reduces relatively gently over the distal third. Setae of Inferior volsella shown as simple.

Pupa and Larva: Not known.

Cytology: Not known.

Found: Manitoba – (Oliver et al. 1990); Lake Winnipeg (Sæther 2012)
Ontario – (Oliver et al. 1990)
Florida – (Caldwell et al. 1997)
Georgia – (Caldwell et al. 1997)
Maine - (Oliver et al. 1990)
Michigan -(Oliver et al. 1990)
Minnesota – (Oliver et al. 1990)
New Jersey – Lakehurst; Riverton (Townes 1945)
New York – Tuxedo (Type locality); Hudson; Moorestown; Prattsville; Westchester Co. (all Townes 1945)

Found in lakes (Hudson et al. 1990).

Adult redescribed by Townes (1945), Sæther (2012), and from type by Sublette (1966).

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