. Elementary entomology . Fig. 386. The pear-slug (7, adult saw-fly, female; c, same in normal state number of prolegs on the abdomen, and lack the hard shield usually- found on the prothorax of lepidopterous cater- pillars. Most of them feed on foliage, and many are quite injurious. Sev- eral species are soft- bodied and covered with a viscid, slimy matter, which has given them the name of " ; Among the more com- mon species are the yellow-and-green currant worms (jVema/us ribe- sii), which devour the foliage of currants and gooseberries, the rose- slug {Moiiostcgia rosae), wh
. Elementary entomology . Fig. 386. The pear-slug (7, adult saw-fly, female; c, same in normal state number of prolegs on the abdomen, and lack the hard shield usually- found on the prothorax of lepidopterous cater- pillars. Most of them feed on foliage, and many are quite injurious. Sev- eral species are soft- bodied and covered with a viscid, slimy matter, which has given them the name of " ; Among the more com- mon species are the yellow-and-green currant worms (jVema/us ribe- sii), which devour the foliage of currants and gooseberries, the rose- slug {Moiiostcgia rosae), which strips off the sur- face of rose leaves, leaving them brown as if scorched, and the pear-slug {Eriocampa cc- rasi), which injures pear and cherr}' foliage in the same manner. Other spe- cies often defoliate straw- berry and raspberry bushes, and there are numerous species which may be found on various shade and forest trees, one of the most injurious being the larch saw-flly (Ly- gaconcviatns cricJisoiiii), which has defoliated and thus destro}'ed large areas of larch in New England and Canada. /', larva with slime removed ; d, leaves with larva (natural size), (a, b, c, much enlarged.) (After Marlatt, United States Department of Agriculture)
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
