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Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

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

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Genus Psylla

green psyllid - Psylla Nymphs - Psylla carpinicola Nymphs - Psylla carpinicola Psylloidea IMG_0823 - Psylla striata - male Psylla carpinicola? - Psylla carpinicola psyllid? - Psylla Psyllidae - Psylla carpinicola wooly alder aphid - Psylla
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 Psylloidea
Family Psyllidae
Subfamily Psyllinae
Genus Psylla
Synonyms and other taxonomic changes
Many species formerly included are now treated under Cacopsylla
Explanation of Names
Psylla Geoffroy, 1762
9 spp. in our area, >100 total (1)
Antennae long, usually at least 2 times as long as the width of the head, approaching 2.5-3 times as long in P. sanguinea and the alder psyllids (P. alni, P. caudata, P. floccosa, P. viridescens). Genal processes well developed. Pterostigma usually present, but absent or diminutive in P. floccosa and P. buxi; female genitalia usually very long, except in P. sanguinea (2).
Widespread in our area (1)
Primarily Betulaceae (Alnus, Betula, Carpinus), as well as Prunus (Roseaceae) & Buxus (Buxaceae) (1)
Life Cycle
Overwintering occurs in the egg stage; feeding occurs on the apical shoots. There is usually one generation per year (3). Nymphs of several species are accompanied by a white flocculent wax (4)