Eacles guianensis (Schaus, 1905)
Scientific name: Eacles guianensis (Schaus, 1905)
Common name:
French name:
Order: Lepidoptera
Suborder: Heterocera
Family: Saturniidae
Subfamily: Ceratocampinae
Wingspan: About 130 mm.
Biotope:
Geographic area: French Guiana, Venezuela, Brazil, Peru.
Flight time:
Number of generations :
Caterpillar:
Host plant:
Eacles guianensis is a large Saturniidae with yellow and dark reddish brown wings.
The costal edge of the fore wings is curved just before the apex like on many members of the same genus.
The marginal edge of males' fore wings is rather straight. This particularity may be used to differentiate Eacles guianensis from the other members of the same genus showing a concave-shaped marginal edge.
There is a yellow collar just at the back of the head. The upper side of the thorax is dark brown at the front and yellow at the back. The upper side of the abdomen is brown with a yellow dorsal line sometimes reduced to a row of dots. The under side of the abdomen is pale yellow.
The four wings bear a white discal spot circled with dark brown.
The fore wings appear rather dark coloured. The yellow area between the base of the wings and the marginal area is strongly spotted with brown.
There is a dark line running from the apex of the fore wing to the two third of the inner edge. It continues on the hind wings from the costal edge to the inner edge. Males' fore wings show a reddish brown patch between this line and the margin. There is still a small remaining yellow area near the apex of the wing and another one near the inner edge.
The hind wings are yellow with a paler area along the costal edge and a darker area along the first basal third of the inner edge.
The broad dark brown median line gradually widens up to the inner edge of the wing. The margin is marked with small semi-circular spots, the largest one being close to the anal angle.

Eacles guianensis - French Guiana, France - March 15th 2012
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Eacles guianensis
I have shot this picture at Roura, at Camps Patawa, during a light trap night session.

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