Biologia Centrali-Americana; Insecta. Neuroptera. Ephemeridae Volume 50

Biologia Centrali-Americana; Insecta. Neuroptera. Ephemeridae Volume 50

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 edition. Excerpt: ...subnodal sector and supplementary sector next below, discoidal triangles free; front wing with internal triangle 2-celled, hind wing with sectors of triangle separated at origin and proximal side of triangle in prolongation of arculus; middle portion of hind prothoracic lobe more or less bilobed; genital hamule of male two-branched. MM. Anal field of hind wing with more than one row of cells between the proximal subbasal sector and the anal margin. N. Males with genital hamule two-branched, females with vulvar lamina projecting distinctly ventrad from the abdomen; arculus of the front wing between first and second antenodals. Eavrnxonrrmx. NN. Males with genital hamulc not branched', females with ' vulvar lamina not projecting; sectors of triangle of hind wing arising from same point. 0. Hind wing with nodus nearer to stigma than to base, area between the rounded anal " angle " and proximal subbasal sector with the cells arranged in 'rows subparallel to that sector and to the margin, that sector unbranched. P. Middle of the field between subnodal sector and supplementary sector next below with two (except in most U D. cannacrioides) rovs of cells, nodal sector usually waved in the middle, front wing with triangles cross-veined and at least three post-triangular rows from the discoidal triangle ont-ward; tooth of tarsal claws always shorter than tip of claws itself. Q. Abdomen not abruptly widened on segments 7-9; males with the antero-inferior row of teeth on the second and third femora inclined, if at all, toward the same direction...... QQ. Abdomen abruptly widened on segments 7-9; males with the antero-inferior row of teeth on second femora inclined toward the knee, on third femora toward the trochanter..... PP....show more

Product details

  • Paperback | 192 pages
  • 189 x 246 x 10mm | 354g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236913396
  • 9781236913395