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Genus Hemerobius

Brown Lacewing - Hemerobius stigma Brown Lacewing larvae - September 3 - Hemerobius humulinus Wesmaelius? - Hemerobius humulinus Diptera? - Hemerobius Brown Lacewing - Hemerobius Brown Lacewing - Hemerobius Lacewing - Hemerobius Hemerobius? - Hemerobius
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Neuroptera (Antlions, Owlflies, Lacewings, Mantidflies and Allies)
Suborder Hemerobiiformia (Lacewings, Mantidflies and Allies)
Family Hemerobiidae (Brown Lacewings)
Subfamily Hemerobiinae
Genus Hemerobius
Explanation of Names
Hemerobius Linnaeus 1758
Greek hemera (ημερα) 'day' + bios (βιοσ) 'life'(1)
Numbers
14 spp. in our area(2), >180 spp. worldwide(3)
Identification
From other genera of brown lacewings
Note comparatively large eye, structure of mouthparts--palps with an apiculus (thin, projecting point). Compare heads of Hemerobius and Micromus below and see discussion under the left-hand image of Hemerobius:

Hemerobius vs. Symperhobius wing venation and the shape of the head:
  

Two wide-ranging species can be separated as follows(4):
Pronotum and mesonotum with broad yellow stripe; upper process of male ectoproct forked distally ---> H. humulinus
Pronotum and mesonotum with, at most, a narrow median stripe (often absent); mesonotum without defined stripe (Fig. 17); upper process of male ectoproct not forked ---> H. stigma
Range
across NA; most diverse in the north and in the west: all but one spp. recorded in Canada, with just one Holarctic sp. reaching FL(2)
Internet References