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The perfect insect appears at the end of June and the 
beginning of July. 
The caterpillar is very pale yellowish green, with a 
greenish line along the back, and another on the sides. 
The date of the appearance of the caterpillar is in 
August and September. 
It feeds on the aspen. 
CYMATOPHORA FLAVICORNIS. 
YELLOW-HORNED. 
Plate XL. Figure 8. 
Localities for this species are Langwith near York, 
Brighton, Tilgate Forest, Dulwich, Horndean, Newnham, 
Black Park, Rugeley, Bristol, Dunham Park, Rannock, 
Birkenhead, Sheffield, Huddersfield, Lewes, Manchester, 
Worthing, and near London. 
The situations where it is found are in and near woods. 
The perfect insect appears in March. 
The caterpillar is whitish or dull greenish, with whiter 
dots, pale brownish between the segments, and with a row 
of black dots on the sides. 
The date of the appearance of the caterpillar is in July, 
August, and September. 
It feeds on the birch. 
