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For Insects, Spiders & Their Kin
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Family Adelgidae

Hemlock Woolly Adelgid - Adelges tsugae - Adelges tsugae Egg-laden Adelgids - Adelges tsugae Coccoidea - Pineus strobi Hemlock adelgid from Tennessee and Aphrophora spittle - Adelges tsugae Sternorrhyncha 7-24-10 03a - Adelges abietis Hemlock parasites - Adelges tsugae Pineus pinifoliae - female Adelges tsugae  - Adelges tsugae
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hemiptera (True Bugs, Cicadas, Hoppers, Aphids and Allies)
Suborder Sternorrhyncha (Plant-parasitic Hemipterans)
Superfamily Phylloxeroidea
Family Adelgidae
Synonyms and other taxonomic changes
now treated in a superfamily of its own, Adelgoidea
Explanation of Names
Adelgidae Schouteden 1909
Numbers
22 spp. in 2 genera in our area • 74 spp. in 5 genera total(1)
Food
hosts: conifers; adelgids feed on needles, twigs, or galls they form
Life Cycle
Multigenerational life cycles. Most species alternate their coniferous hosts
Remarks
Some of the most destructive introduced pests belong to this group
Print References
Havill N.P., Foottit R.G. (2007) Biology and evolution of Adelgidae. Ann. Rev. Entomol. 52: 325‒349 (Full text)
Works Cited
1.Catalogue of Life