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Species Caliroa cerasi - Pear Slug

Caliroa cerasi 2nd instar - Caliroa cerasi pear slug - Caliroa cerasi pear slug - Caliroa cerasi pear slug - Caliroa cerasi pear slug - Caliroa cerasi pear slug - Caliroa cerasi Look like pear sawflies - Caliroa cerasi Caliroa larva on pear tree - Caliroa cerasi
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 Heterarthrinae
Tribe Caliroini
Genus Caliroa
Species cerasi (Pear Slug)
Other Common Names
Pear Sawfly, Cherry Slug, Pear & Cherry Slugworm
Explanation of Names
Caliroa cerasi (Linnaeus 1758)
Size
adult 4-6 mm, larva up to 11 mm(1)(2)
Range
native to Europe & w. Asia, adventive on all other continents(1)(3); in NA, widespread, mostly in n. US and so. Canada (map)(4)
Season
In Canada adults emerge and fly in mid-June to late July, elsewhere as early as mid-May(5)
Food
polyphagous on Rosaceae(3)
Life Cycle
parthenogenetic (males unknown in NA, rare in Europe), usually bivoltine in NA(2)
Remarks
larvae feed on upper surface of leaves producing distinctive skeletonizing wounds(6)
Internet References
Species pages: anon.(5) | anon.(7)