Head: Wide, reddish; black from antenna to top of head in center. Upper half of eyes have wide reddish-brown border. Lower eyes have a bright yellow margin. Lower face reddish on female; entirely. Cheeks much wider than eye width.
Antenna: Base (scape) and segments dark reddish on top side and reddish-yellow on underside. Segments thick, all about the same size.
Thorax: Rough, black with reddish-brown streaks, no yellow. Segment 2 (scutellum) deep indent, raised knobs rusty reddish. Segment 3 (propodeum) black with long yellow mark on each side and white hairs at end. Thorax sides more reddish with some black; white hairs. Tubercles (pronotal lobe) red to yellow, another narrow, transverse yellow mark, with top and bottom borders bright reddish brown. Underside of thorax with dense white hairs.
Wings: Wing knobs (tegulae) brownish-yellow to red. Wings dusky reddish, much lighter area before darker border at tips. Veins dark, stigma reddish-brown.
Legs: Red, streaked with black. Front legs lighter, more yellowish. Thighs (femora) black on underside. Hind shin (tibiae) black on underside and 4 to 5 long bristles at tip.
Abdomen: Black with bright lemon-yellow marks.
Segment 1: Thin wavy series of disjointed marks.
Segment 2: Very large stripe with slight interrupt at centre.
Segment 3: Narrower stripe, notched on lower margin, very widely interrupted at centre.
Segment 4: Narrow stripe, deeply notched on lower margin; very slight interrupt at centre.
Segment 5: Large square patch in centre, covering width of segment. Small yellow mark at each side.
Tip square, covered with dense silvery and yellow hairs.
Underside reddish-brown, some segments have yellow dots.
Head: Upper face black, with short pale yellowish hairs on upper face (front); lower face including eye margin, yellow with silvery hairs. Cheeks black, much narrower than eye width.
Antenna: Base (scape) swollen, black on top side, yellow on underside. Segments brownish-yellow to black on top side, reddish-brown on underside. Segment 1 shorter than all others.
Thorax: Black with short pale hairs. Collar (pronotum) black, sharply angled at each end. Segment 2 (scutellum) black, the raised knobs, sometimes with slight yellowish dot. Thorax sides with large yellow spot. Tubercles (pronotal lobes) brownish-yellow; silvery hairs. Underside has dense white hairs.
Wings: Wing knobs (tegulae) brownish-yellow. Wings hyaline, much lighter patch just before wide dark tips. Veins brownish-black.
Legs: Front and mid legs reddish-yellow on top, underside blackish. Hind pair darker, streaked with rusty reddish, especially the thigh (femora).
Abdomen: Black with yellow spots and bands, similar to female.
Segment 1 stripe very narrow, slightly interrupted.
Segment 2 large spot on each side, narrowing toward centre with a slight interrupt.
Segment 3 fairly large spot on each side, widely interrupted at centre.
Segment 4 and 5 stripe widely interrupted at center, lower edge has two U-shaped deep indents, sometimes breaking stripe entirely. Those of 5 may have spots instead, at side edges.
Segments 6 has centre square with a small spot at each side edge.
Abdomen tip is black, rounded with a slight notch, underside with pale erect hairs.
Underside is black, except segments 2 and 3 yellow.
Size: Female 7.5 to 9 mm. Male 7.5 to 8.5 mm.
Habitat: Meadows with asters, goldenrod and Mining Bee Andrena asteris
Food: Flower pollen and nectar.
Flight Time: August to September.
Life Cycle: According to Ascher in Northeastern Naturalist, 2014, Vol. 21; N. banksi is possibly a parasite of the Mining Bee Andrena asteris.
Comments: Essex County – Ojibway species list 2008. Also Middlesex and Brant Counties.
For information on synonyms, references and type specimens see next page