Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Summer 2025 gathering in Louisiana, July 19-27

Photos of insects and people from the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2024

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

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
TaxonomyBrowse
Info
ImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Symphyta" - Sawflies, Horntails, and Wood Wasps » Argid Sawflies (Argidae) » Arge » pectoralis group (Arge pectoralis group)

pectoralis group

Classification · Numbers · Size · Range · Season · Food · Life Cycle · Works Cited
Sawfly Larva - Arge pectoralis Orange buttonbush bug - Arge pectoralis BG2393 E0323 - Arge another oak sawfly - Arge quidia Sawfly on Elm but not Cimbex - Arge scapularis Sawfly larva - Arge quidia Chokecherry Sawfly - Arge pectoralis Argidae sp. ? #1 and #2 spin cocoon early mng 05.10.2020 - Arge tumsua
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Symphyta" - Sawflies, Horntails, and Wood Wasps)
Family Argidae (Argid Sawflies)
Genus Arge
No Taxon pectoralis group
Numbers
6 spp. in our area;* a dozen total(1)
*not yet in the guide: A. rumica (w. NV & so. CA), A. salicis (e. US: NJ-SC to IL-KY)
Size
Larvae are 18mm long(2)
Range
holarctic; in our area, mostly eastern; A. pectoralis is transcontinental in the north, A. rumica is our only western sp. (w. NV & so. CA)(1)
Season
Adults appear in June and July; Larvae are present July to Sept(2)
Food
Willow(2)
Life Cycle
Eggs are deposited in slits cut in the margins of leaves.(2)
Overwinter as full-grown larvae in cocoons spun in the litter on the ground.(2)
Works Cited
1.The sawfly genus Arge (Hymenoptera: Argidae) in the Western Hemisphere
Smith D.R. 1989. Trans. Am. Ent. Soc. 115: 83‒205.
2.Eastern Forest Insects
Whiteford L. Baker. 1972. U.S. Department of Agriculture · Forest Service.
Contributed by v belov on 17 August, 2012 - 4:13pm
Additional contributions by Marci Hess, PaleoJon
Last updated 17 December, 2024 - 8:00pm

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2025 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact