Hemerobius stigma

Brown Lacewing
Hemerobius stigma

 

Identification:
Head: Head reddish-brown, shiny. Eyes dark brown. Top of head may be somewhat lighter.
Antenna: Long, yellow ringed with dark.
Thorax: Dark reddish-brown, shiny. Neck (pronotum) may have a faint, pale stripe down center.
Wings: Light reddish-brown to yellowish-brown. Veins dotted with cream-colour dots that appear raised or bubble-like along the veins. Stigma at end of costal area has a reddish tint.
Legs: Yellowish-brown, feet slightly darker.
Abdomen: Dark yellowish-brown abdomen. No marks.

Main ID: Veins dotted with cream-colour dots that appear raised or bubble-like along the veins.

Similar Species: The Striped Brown Lacewing Hemerobius humulinus has shorter antenna, yellow thorax, dark patches on the wings and obvious stripe from eyes continuing down sides of neck (pronotum).

Size: 8 to 11 mm to wing tip.

Flight Time: April to May, again September to October.

Habitat: Forests and orchards. Prefers coniferous forests – especially pine.

Food: Prefers the balsam twig aphid Mindarus abietinus in Christmas tree plantations, also Woolly aphid Adelges piceae and Pine Bark Aphid Pineus strobi.

Life Cycle: This species has either two generations, or it hibernates as an adult during the summer. Also over-winters as an adult or pre-pupa. In early spring, the adults mate and eggs are deposited about two weeks later. The adult females and the eggs are extremely cold-tolerant (Garland 1981b). Eggs are laid singly, on fir needles or between bud scales. Eggs hatch in about 11 days, depending on the temperature.
Parasite: Gall Wasp Anacharis species.

Comments: Essex County – Point Pelee. Kent County – Rondeau Provincial Park.

For information on synonyms, references and type specimens see next page