Libellula forensis
| Libellula forensis | ||||||||||||
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Libellula forensis |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Libellula forensis | ||||||||||||
| ( Hagen , 1861) |
Libellula forensis is a dragonfly - Art of the genus Libellula of the subfamily Libellulinae . Their distribution area extends west of the Rocky Mountains in the USA and Canada .
features
Construction of the Imago
The animal reaches a length of 44 to 50 millimeters, of which 27 to 32 millimeters are on the abdomen . L. forensis has a light yellow face with two lighter spots on the forehead. The thorax is brown with two yellow stripes on either side. The hind wings reach a length of 35 to 41 millimeters. Both pairs of wings have a dark brown shadow at the base that extends to the wing triangle . Another spot in the wing is between the nodus and just in front of the pterostigma . In adult males and occasionally also in females, the areas around these dark wing regions turn whitish. The blunt abdomen is dark brown and has yellow stripes on the sides that dissolve into dots at the back of the abdomen. With age, the abdomen turns ash gray. In the females, the eighth segment is slightly widened.
Construction of the larva
The larvae have eyes located in the center of the face and a long abdomen that tapers towards the end. The edge of the unpaired front part of the labium , the so-called prementum, is smooth.
credentials
- ↑ a b Archived copy ( memento of the original from August 27, 2006 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. (June 5, 2006)
- ↑ Jerrell James Daigle: Florida Dragonflies (Anisoptera): A Species Key to the Aquatic Larval Stages . In: Technical Series . 12, No. 1, November 1992, p. 23.
