Stigmus Americanus

	Stigmus Americanus ''Stigmus americanus'' is a species of aphid wasp in the family Pemphredonidae Pemphredonidae is a family of aphid wasps formerly treated as the subfamily Pemphredoninae. There are 19 genera and 556 described species in the family. Description and identification The primary morphological distinction between the Pemphredond .... It is found in North America. Biology ''Stigmus americanus'' nest in twigs of certain trees and shrubs, including ''Erythrina'', ''Paeonia'', ''Sambucus'', ''Chionanthus'', ''Syringa'', ''Prunus'', ''Polyphorus'', and ''Sassafras''. They frequently utilize pre-existing cavities, but also excavate their own nests. A ''Stigmus americanus'' wasp provisions its nest with paralyzed aphids, and places its eggs on the thoracic ventor and abdomen of the aphids in its nest. When an egg hatches, the larva feeds on the paralyzed aphid and eventually emerges from the aphid shell as an adult wasp. The cuckoo wasps ''Omalus iridescens'' and ''O. purpuratus'' paras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Alpheus Spring Packard Alpheus Spring Packard Jr. LL.D. (February 19, 1839 – February 14, 1905) was an American entomologist and palaeontologist. He described over 500 new animal species – especially butterflies and moths – and was one of the founders of '' The American Naturalist''.Cockerell (1920) Early life He was the son of Alpheus Spring Packard Sr. (1798–1884) and the brother of William Alfred Packard. He was born in Brunswick, Maine, and was Professor of Zoology and Geology at Brown University in Providence, Rhode Island, from 1878 until his death. He was a vocal proponent of Neo- Lamarckism during the eclipse of Darwinism.Sorenson (1995) Career & Works His chief work was the classification and anatomy of arthropods, and contributions to economic entomology, zoogeography, and the phylogeny and metamorphoses of insects. Packard was appointed to the United States Entomological Commission in 1877 where he served with Charles Valentine Riley and Cyrus Thomas.Mallis (1971) He wrote ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pemphredonidae Pemphredonidae is a family of aphid wasps formerly treated as the subfamily Pemphredoninae. There are 19 genera and 556 described species in the family. Description and identification The primary morphological distinction between the Pemphredondae and the Psenidae is that Pemphredondae never have more than two submarginal cells in their forewing while Psenidae have three submarginal cells. Biology The subfamily consists of solitary wasps, each genus having its own distinct and consistent prey preferences. The adult females dig tunnels in the ground, or plant material, for nesting. As with all other apoid wasps, the larvae are carnivorous; females hunt for prey on which to lay their eggs, mass provisioning the nest cells with paralyzed, living prey that the larvae feed upon after hatching from the egg. Taxonomy and phylogeny As Pemphredoninae, this taxon was previously divided into four tribes: Entomosericini, Odontosphecini, Psenini, and Pemphredonini. The Pemphredonini were c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
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