DESCRIPTIONS OF LARVAE OF EIGHT NEARCTIC SPECIES OF DOLERUS (HYMENOPTERA: TENTHREDINIDAE) WITH FOCUS ON SIX EQUISETUM- FEEDING SPECIES FROM THE OTTAWA REGION

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Abstract
The larvae of eight Nearctic sawfly species in the genus Dolerus are described here for the first time. Six species, D. aprilis, D. tibialis conjugates, D. gilvipes albifrons, D. apricus, D. acidus, and D. subfasciatus, were reared from adults collected on the field horsetail, Equisetum arvense Linnaeus, and the larvae of two species, D. sericeus and D. nitens, were collected on grasses. The life history of Dolerus spp. is described. An illustrated key to the species dealt with is provided. Taxonomic affinities among. the species are briefly discussed.