Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Symphyta" - Sawflies, Horntails, and Wood Wasps » Common Sawflies (Tenthredinidae) » Blennocampinae » Tomostethini » Tethida » Black-headed Ash Sawfly (Tethida barda)

Species Tethida barda - Black-headed Ash Sawfly

Pennsylvania Sawfly larva - Tethida barda

Pennsylvania Sawfly larva - food plant - Tethida barda

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 Tenthredinidae (Common Sawflies)

Subfamily Blennocampinae

Tribe Tomostethini

Genus Tethida

Species barda (Black-headed Ash Sawfly)

Synonyms and other taxonomic changes

Tethida cordigera: Tenthredo cordigera Beauvois 1809 nec Geoffroy 1785

Explanation of Names

Tethida barda (Say 1836)

Size

average: ♂ 6.8 mm, ♀ 7.2 mm(1), larva to 18 mm

Range

e. NA (NS-FL to SK-TX)(1) + CA(2)

Habitat

Deciduous forests or areas with Ash (Fraxinus) trees.

Season

mostly: May-June (BG data)

Food

Larvae feed on Ash Fraxinus(1)

Life Cycle

larvae | later instar larva | adult

Females make slits in Ash leaf stems and lay 6 to 10 eggs per leaf. Hatching occurs within 2 to 3 days. 1st instar lasts 3 to 4 days. Larvae feed on the underside of the leaves. Overwinter as mature larvae in a cocoon on the ground. Pupate in spring. One generation per year in the north.

Works Cited

1.	Nearctic sawflies. I. Blennocampinae: Adults and larvae (Hymenoptera: Tenthredinidae) D.R. Smith. 1969. Agricultural Research Service, USDA Technical Bulletin No. 1397. 179 pp.

2.	Garden Insects of North America : The Ultimate Guide to Backyard Bugs (Princeton Field Guides) Whitney Cranshaw. 2004. Princeton University Press.

Contributed by v belov on 10 October, 2009 - 6:22pm
Additional contributions by Beatriz Moisset, Mike Quinn, lee_penner
Last updated 22 June, 2021 - 4:46pm

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