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Family Argidae - Argid Sawflies

Sawfly Larva - Arge Birch Sawfly--with defensive secretion - Arge pectoralis Poison Ivy Sawfly - Arge humeralis Argid Sawfly - Arge quidia - female Argid Sawfly - Arge quidia - female Unknown Bug - Arge Unknown Sawfly - Arge pectoralis - female Sawfly larva - Arge quidia
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)
Numbers
~60 spp. in 12 genera in our area(1)
Size
8-15 mm(1)
Identification
Stout bodied, easily recognized by their characteristic antennae: three-segmented, the third segment very long; males of some species have the last antennal segment U-shaped or Y-shaped. Most argids are black or dark colored.
NA argid larvae may be separated from other sawfly larvae by the following combination of characters: (1) Presence of a divergent lobe next to the tarsal claw of each thoracic leg (lobe reduced in Atomacera); (2) one-segmented antenna which may be flat, rounded, or peglike; (3) abdominal segments 1 to 9 each with 3, sometimes 2, annulets; (4) presence of a tarsal claw on each thoracic leg, or only prothoracic leg lacking a tarsal claw. (Smith 1972)
Range
Worldwide, most diverse in the tropics.
Food
The larvae feed mainly on foliage of various kinds of ferns, horsetails, gymnosperms and angiosperms, occasionally they feed on the pith of twigs or on catkins.
Print References
descriptions & host associations of several common eastern species(2)
Works Cited
1.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
2.Eastern Forest Insects
Whiteford L. Baker. 1972. U.S. Department of Agriculture · Forest Service.