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Female scale insects, unusually for Hemiptera, retain the immature external morphology at sexual maturity. Adult males have wings but never feed and die within a day or two. Male scale insects are unusual in possessing only one pair of wings, thus making them resemble true flies ([http://en.wikipedia.org/wiki/Diptera Diptera]), though they lack the halteres (rudimentary hind wings) seen in flies, and have tail filaments, which do not occur in flies. The specifics of their reproductive systems vary considerably within the group, including hermaphroditism and at least seven forms of parthenogenesis.
Female scale insects, unusually for Hemiptera, retain the immature external morphology at sexual maturity. Adult males have wings but never feed and die within a day or two. Male scale insects are unusual in possessing only one pair of wings, thus making them resemble true flies ([http://en.wikipedia.org/wiki/Diptera Diptera]), though they lack the halteres (rudimentary hind wings) seen in flies, and have tail filaments, which do not occur in flies. The specifics of their reproductive systems vary considerably within the group, including hermaphroditism and at least seven forms of parthenogenesis.
==Treatment==
{{edit-treatment}}<!--- Type treatment info below this line, then delete this entire line -->
==Gallery==
<gallery>
<gallery>
Image:Scale insect.jpg| A female [[cottony cushion scale]], (''Icerya purchasi'' Maskell) scale with young crawlers
Image:Scale insect.jpg| A female [[cottony cushion scale]], (''Icerya purchasi'' Maskell) scale with young crawlers
* [[felted scale]]s (Eriococcidae)
* [[felted scale]]s (Eriococcidae)
{{WPATT}}
== External links ==
== External links ==
* [http://www.sel.barc.usda.gov/scalenet/scalenet.htm ScaleNet homepage]
* [http://www.sel.barc.usda.gov/scalenet/scalenet.htm ScaleNet homepage]
*[http://gardenbees.com/biological%20control/revolution.htm Cottony Cushion Scale: the pest that launched a pest control revolution] ''with photos''
*[http://gardenbees.com/biological%20control/revolution.htm Cottony Cushion Scale: the pest that launched a pest control revolution] ''with photos''
*[http://entomology.ifas.ufl.edu/fasulo/woodypest/scales.htm Scales of southerastern U.S. woody ornamentals]
*[http://entomology.ifas.ufl.edu/fasulo/woodypest/scales.htm Scales of southerastern U.S. woody ornamentals]
on the [[University of Florida|UF]] / [[Institute of Food and Agricultural Sciences|IFAS]] Featured Creatures Web site
on the University of Florida (UF) / Institute of Food and Agricultural Sciences (IFAS) Featured Creatures Web site
*[http://entomology.ifas.ufl.edu/creatures/orn/scales/red_wax_scale.htm ''Ceroplastes rubens'', red wax scale ]
*[http://entomology.ifas.ufl.edu/creatures/orn/scales/red_wax_scale.htm ''Ceroplastes rubens'', red wax scale ]
*[http://entomology.ifas.ufl.edu/creatures/orn/scales/fig_wax_scale.htm ''Ceroplastes rusci'', fig wax scale]
*[http://entomology.ifas.ufl.edu/creatures/orn/scales/fig_wax_scale.htm ''Ceroplastes rusci'', fig wax scale]
