Antenna: Black, wide and flattened. Segment 2 very short.
Thorax (Pronotum): Almost semi-circular. Middle has a shiny, black stripe, very wide and extends to both front tip and widens at hind border. Each side of the black stripe has a rose patch. Outside edge, except the front tip (black) has a narrow, translucent yellow border.
Wings (Elytra): Entirely black. Each wing has a slight ridge or raised line down length of wing.
Legs: Entirely black.
Abdomen: Entirely black. No light organs. Non-flashing.
Similar Species: Pyropyga nigricans has black outside border on the thorax.
Size: 4.5 to 7 mm
Habitat: Prefers open areas like meadows and fields.
Food: Adults found feeding on Milkweed, Trumpet Vine and Cup Plant flowers in Wheatley.
Flight Time: Mid-June to mid-September
Life Cycle: Unknown. Larvae will feed on earthworms and gastropods in the lab. Dillon and Dillon (1961) report all Pyropyga, both adult and larvae, feed on other insects. Other entomologists have assumed one generation per year, overwintering as larvae. Recorded in Wheatley mating in June, July and again in mid-September.
Comments: Essex County – Ojibway Prairies, 2011 per Luk. Wheatley per photos from 2004 to 2014.
Synonyms: Harris, 1836
Transactions of the Natural History Society of Hartford, 1836 by Harris, pp. 74 to 75.
Beetles of Indiana 1910 by Blatchley, pp. 819 to 820.
Transactions of the American Entomological Society, 1918, Vol. 44 by Green, pp. 251 to 252.
The Coleopterists Bulletin 1961, Vol. 15 #3 by Green, pp. 66 to 72.
Canadian Journal of Arthropod Identification, 2011 #16 Fireflies by Luk et al., pp. 76 to 78.