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Family Hemerobiidae - Brown Lacewings

Brown lacewing - Hemerobius stigma Daytime Brown Lacewing - Hemerobius hemerobiid - Micromus variegatus Brown Lacewing larva - Micromus Sympherobius occidentalis  - Sympherobius occidentalis Micromus posticus? - Micromus lacewing - Sympherobius Lacewing or ally? - Hemerobius
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Neuroptera (Antlions, Lacewings, and Allies)
Suborder Hemerobiiformia (Lacewings and Allies)
Family Hemerobiidae (Brown Lacewings)
Explanation of Names
Hemerobiidae Latreille 1802
Numbers
>60 spp. in 6 genera in our area(1), including 10 spp. in 4 genera in FL(2); >600 spp. in ~30 genera worldwide(3)(4) arranged into 10 subfamilies
Size
6-15 mm
Identification
Hemerobiidae is the only family of Neuroptera with veins Rs and MA being partially fused (giving the appearance of multiple radial sectors). They are similar to green lacewings (Chrysopidae) but are smaller (forewing 4-12 mm) Hemerobiidae are more commonly brown in color, but isolated species can also be yellow, green, or black.(5) The wings are also generally more rounded with the membrane more extensively covered with small hairs.

Overview of Genera by Wing Venation
                   Hemerobiinae                     |    Megalominae     |      Microminae      |     Notiobiellinae     |    Sympherobiinae
      Hemerobius       |      Wesmaelius     |      Megalomus      |       Micromus        |          Psectra         |     Sympherobius


Keys to Species
Keys to species are found in Carpenter (1940) for North America(6) and MacLeod & Stange (2001) for Florida.(7)
Range
worldwide & throughout North America (more diverse in the west). 36 spp. range into Canada (12 Hemerobius, 11 Wesmaelius, 2 Megalomus, 6 Micromus, 1 Psectra, and 4 Sympherobius).(1)
Habitat
Woodlands
Season
Spring to fall, into winter in south.
Food
Adults and larvae predaceous. Homopterans, such as aphids, are favorite prey.
Life Cycle
Females attach eggs directly to leaves (not on stalks as the Chrysopidae). Larvae do not carry debris on their backs.
See Also

Some Chrysopidae are either tan or have a tan overwintering form, but their wing venation is different:
Internet References
Fact sheet (MacLeod & Stange 2001-2011)(7)
Works Cited
1.Species catalog of the Neuroptera, Megaloptera, and Raphidioptera of America North of Mexico
Penny N.D., Adams P.A., Stange L.A. 1997. Proc. Calif. Acad. Sci. 50: 39-114.
2.A Checklist and Bibliography of the Megaloptera and Neuroptera of Florida (by L. Stange)
3.Revision and cladistic analysis of the world genera of the family Hemerobiidae (Insecta: Neuroptera)
Oswald J.D. 1993. J. N.Y. Ent. Soc. 101: 143-299.
4.Neuropterida Species of the World catalogue (by J.D. Oswald)
5.Neuroptera (Neuropterida)
John D. Oswald, Atilano Contreras-Ramos, & Norman D. Penny. 2002. Biodiversidad, Taxonomía y Biogeografía de Artrópodos de México: hacia una síntesis de su conocimiento. Vol. 3: pp. 559-581.
6.A revision of the Nearctic Hemerobiidae, Berothidae, Sisyridae, Polystoechotidae and Dilaridae (Neuroptera)
Carpenter F.M. 1940. Proc. Amer. Acad. Arts and Sciences 74: 193-280.
7.Brown Lacewings of Florida