Head: Black, very wide, smooth, shiny. Mouth and whiskers (palpi) reddish-yellow.
Antenna: Short, thick; sometimes segments 4 to end dark with light tips (annulated), or entirely pale. Segments 1 to 3 always pale.
Thorax: (Pronotum): As wide as head, black with wide yellow rim or shelf on each side along with and base and lower margin yellowish. Lighter indented line down middle.
Wings (Elytra): Wide, black with yellow line along side margins; about 8 ridged lines down wings. Large reddish-yellow patch on each wing, starting at base and widening to almost mid wing. Lower wings have a large yellowish patch, base margin jagged. Tips square, abdomen usually protruding.
Legs: Reddish-yellow. Male have pads on underside of front feet.
Abdomen: Underside reddish-yellow.
Size: 5 to 7 mm.
Habitat: Forest edges and meadows.
Food: Small Leaf Beetle eggs and larvae like Galerucella cavicollis.
Flight Time: May, again in September.
Life Cycle: One generation per year. Adults over-winter, usually under logs.
Comments: Essex County – Wheatley per photos. Kent County – Rondeau Provincial Park. Also collected on Manitoulin Island at alvars.
For information on synonyms, references and type specimens see next page