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Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

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Genus Macrosiphum

Aphid - Macrosiphum euphorbiae Large aphid on lupin - Macrosiphum albifrons - female Aphids? - Macrosiphum Macrosiphum olmsteadi  - Macrosiphum olmsteadi Big aphid - Macrosiphum rosae Macrosiphum euphorbiae - female Aphid - Macrosiphum lilii SBBG-SCL-TIC_000369 - Macrosiphum
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 Aphidoidea
Family Aphididae (Aphids)
Subfamily Aphidinae
Tribe Macrosiphini
Genus Macrosiphum
Explanation of Names
Macrosiphum Passerini 1860
Numbers
~60 spp. in 2 subgenera in our area(1), ca. 140 spp. in 3 subgenera (all but 8 spp. the nominate subgenus) worldwide(2)
Life Cycle
There are a number of generations of parthenogenetic females, most are wingless but when conditions become overcrowded winged aphids are produced that may migrate to other hosts. At the end of summer or in the fall males and females are produced, they mate and eggs are laid. Eggs overwinter.
1. Population which includes nymphs, and wingless and winged adults. 2. Parthenogenetic female giving birth. 3. Wingless adult and recently laid eggs. 4. Overwintering eggs.
Print References
Jensen, A.S. 2015. Two new species of Macrosiphum Passerini (Hemiptera: Aphididae) from Western North America. Proceedings of the Entomological Society of Washington, 117(4): 481-494.