Species Hartigia trimaculata - Rose Shoot Sawfly

Classification · Synonyms and other taxonomic changes · Explanation of Names · Size · Identification · Range · Season · Food · Life Cycle · Remarks · Internet References

Which wasp, fly, or sawfly is this, please? - Hartigia trimaculata

Flying Insect - Hartigia trimaculata - female

Wasp (or Sawfly, or...?) ID Request - Hartigia trimaculata

Classification

Kingdom Animalia (Animals)

Phylum Arthropoda (Arthropods)

Class Insecta (Insects)

Order Hymenoptera (Ants, Bees, Wasps and Sawflies)

No Taxon (Sawflies, Horntails, and Wood Wasps)

Family Cephidae (Stem Sawflies)

Genus Hartigia

Species trimaculata (Rose Shoot Sawfly )

Synonyms and other taxonomic changes

First described in 1824 by Thomas Say as Cephus trimaculatus

Hartigia trimaculatus

Explanation of Names

trimaculatus is Latin for "three-spotted"

Size

Females from 12 to 14 mm; males 10 to 17 mm. Fully grown larvae, 21 mm.

Identification

Adult: Elongate, slender, mostly black, wasplike sawfly

Larva: Pinkish white, cylindrical, somewhat S-shaped, with slightly enlarged thorax.

Range

Across southern Canada, throughout eastern and central United States. Appears to be more common in eastern United States.

Season

Adults begin emerging in late April and continue through summer.

Food

Larvae bore in stems of Rosa and Rubus

Life Cycle

Females lay eggs inside stems of host plants. Larvae feed through the Summer, drop to the ground in the Fall and overwinter in the soil. One generation a year.

Remarks

A serious pest in some places.

Internet References

Forest Pests

Narrative of an expedition to the source of St. Peter's River, v.2, Appendix, pt.1(Zoology), p.313 Thomas Say's original description of the species.

Contributed by v belov on 13 July, 2009 - 3:09am
Additional contributions by Beatriz Moisset, Chuck Entz, ceiseman
Last updated 5 September, 2009 - 10:14pm

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