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pectoralis group

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.