. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. 180 HOP. u proved (when submitted for examination to Mr. E. H. Meade) to be^ the Dilophus vulgaris, Meigen, a small two-winged fly (for size and shape see figure, p. 129), of which the males are mtensely black; the females have the abdomen brown, and the wings br
. A manual of injurious insects [microform] : with methods of prevention and remedy for their attacks to food crops, forest trees, and fruit : to which is appended a short introduction to entomology. Insect pests; Agricultural pests; Entomology; Insectes nuisibles, Lutte contre les; Ennemis des cultures, Lutte contre les; Entomologie. 180 HOP. u proved (when submitted for examination to Mr. E. H. Meade) to be^ the Dilophus vulgaris, Meigen, a small two-winged fly (for size and shape see figure, p. 129), of which the males are mtensely black; the females have the abdomen brown, and the wings brown or blackish. A second brood appears in autumn. The amount of damage that it may cause is worth watching, for, as far as we see at present, it is one of the instances in which the grubs are double-feeders. They are considered to live upon the roots of plants, particularly of Grass and Corn. John Curtis, in his ' Farm Insects,' p. 467, notices this same species of Dilophus, then known aafehrilis, Linn., as " exceed- mgly abundant every year, and the larvae causing much damage in the gardens "; but also the grubs are to be found both in horse and cow manure, and were noted by Curtis as found in considerable quantity in "a vine border amongst the horse ;—(«Gard. Chron.' 1844.) Looking at these various points together, it seems very likely that the flies lay their eggs in the manure, and thus the grubs are introduced to the roots of the plants; and if, on further investigation, the damage done to the roots prove im- portant, it is this point (the presence of the grub in manure) which will be the one to look to first. Hop Plea. Haltica concinna, Curtis {'Farmln.') =CIia;tocnema condnna, 1 and 2, Hop Flea, nat. size and magnified; 3, hind leg, magnified. This species of Hop Flea, known as the Brassy or Tooth- legged Turnip Flea, is very like the common Turnip Flea or Fly-beetle, but differs in being more oval, convex, and shiny. i ^\°^ ^ greeni
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectentomology, bookyear1
