Tabanidae of Ohio

Tabanidae of Ohio

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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. 1903 edition. Excerpt: ...of seven visible segments, broad, never' constricted. Key to the North American Genera. 1.. Hind tibiae with spurs at the tip, sometimes small ' 2. Hind tibiae without spurs 6. 2. Third segment-of the antenna composed of eight annuli, the first of which is only a little longer than the following ones Third segment of the antenna composed of only five annuli, the first of which is much longer than any of the following. ones; ocelli present. 3. Front of female narrow; ocelli present or absent; fourth Q! posterior cell at least open Pangonia. Front of female broad with a large denuded callus; ocelli. present-i 4'. 4. Eyes in the female acutely angulated above; wing in both sexes with a dark picture Goniops. Eyes in the female not acutely angulated above; wings hyaline in both sexes Apatolester. 5. Second segment of the antenna about half as long as the first; eyes in life with numerous small dots Silt/ins. Second segment of the antenna as long or but little shorter than the first; wings with a dark picture Chrysops. 6. Third segment of the antenna without, or with a rudimentary basal process 3-,1.-.. 7.-Third segment of the-antenna with a well developed basal process-.., -., -. Tabanus. 7. Front of female as broad as long the callus transverse Haematopota. Front of the female'narr'ow " Diachlorus. Including Atylotu-s and Therioplectes. CHRYSOPS Meigen. Illiger's Magazine II, 367, 1803. The males and females in this genus are so different that it is-often desirable to make observations in the field before associat ing the two sexes of a species. We have made a special effort to collect the sexes of our local species and have formulated sep arate keys for each sex. These keys are given below. Key to the Females. Apex ofthe more

Product details

  • Paperback | 28 pages
  • 189 x 246 x 2mm | 68g
  • United States
  • English
  • black & white illustrations
  • 1236864395
  • 9781236864390