Pyropyga decipiens

Firefly
Pyropyga decipiens

 

Firefly Pyropyga decipiens on underside of Joe-Pye Weed with Red Velvet Mite. July 17, 2011. Wheatley, Ontario.
Firefly Pyropyga decipiens on underside of Joe-Pye Weed with Red Velvet Mite. July 17, 2011. Wheatley, Ontario.

Identification:
Head: Black.
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.

Firefly Pyropyga decipiens on underside of Milkweed leaf Jun 22, 2011. Wheatley, Ontario.
Firefly Pyropyga decipiens on underside of Milkweed leaf Jun 22, 2011. Wheatley, Ontario.

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.

Fireflies Pyropyga decipiens mating on Milkweed leaf. June 14, 2012. Wheatley, Ontario.
Fireflies Pyropyga decipiens mating on Milkweed leaf. June 14, 2012. Wheatley, Ontario.

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.

Firefly Pyropyga decipiens feeding on Milkweed leaf. June 28, 2014. Wheatley, Ontario.
Firefly Pyropyga decipiens feeding on Milkweed leaf. June 28, 2014. Wheatley, Ontario.

Comments: Essex County – Ojibway Prairies, 2011 per Luk. Wheatley per photos from 2004 to 2014.

Synonyms: Harris, 1836
Lampyris decipiens

References:
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.

Types: Unknown

 

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