Aquatic Insects in New York State

Aquatic Insects in New York State

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: ...from many bred and captured specimens. Male. Length 1.5mm to 2mm. Very different in appearance from female. Eyes confluent, very large, brilliant coppery; a very marked difference in the size of the facets, those on upper surface being very large and metallic copper, those below and surrounding trophi becoming suddenly small, black, with bronze reflections; trophi reddish black, dwarfed; antennae black, with light, yellowish brown pubescence in front. Thorax above intense black, velvety with a bluish luster; underside grayish. Legs reddish with black tarsi. Wing hyaline, veins and base bluish white. Abdomen; above, black with posterior margins of segments edged with gray; undersides of segments 2 and 3 light, reddish gray, the others blackish, with gray posterior margins. Sexual organs black. Thorax and abdomen very sparsely clothed with white pubescence. Described from three bred specimens. Larva. Length when full grown 5.5mm to 7mm. Normal shape and general appearance differ from S. p e c u a r u m by the much more irregular markings of segments and head. A majority of the larvae possess one or two lateral spots on clubshaped posterior third of body. Head lacks the regular arrangement of spots and lines, which become confused; the two black spots on each side present. Antennae uniformly pale, much longer than in pecua rum, slender and three jointed; first joint almost twice as long as joints 2 and 3 together, and a little bent; at base three times and at tip twice as thick as second joint, which is nearly uniform in width, tapering but very slightly toward the tip; joint 3 small and pointed, about one fifth as long as joint 2. Mentum similar to that of S. pecuarum, but distinguished by a natter apex, by the possession of three erect bristles on...show more

Product details

  • Paperback | 124 pages
  • 189 x 246 x 7mm | 236g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123648794X
  • 9781236487940