64 THE GENERA OF BRITISH MOTHS. 
one inch two lines across the expanded wings; the front wings are dull brownish, with the renal stigma blackish, 
and some of the nervures darker brown; the hind wings are pale grayish brown, with a darker mark in the centre. 
The third species, A. Avcuosa, resembles 4. Caliginosa, but is rather smaller, and has the fore wings paler and 
the markings less distinct, while the hind wings have a much darker border. The Moth is not very uncommon in 
woods near London, but the larva is unknowa to our collectors. 
The genus Stilbia is distinguished by the character of the wings, which fold round the body like those of the 
Lithosie, and are very shining. They have very distinct markings in the males, while those of the females are 
darker, and without either band or stigma, or, having them but very indistinctly, There is but one species, 
Stilbia Anomala (the Anomalous, No. 19) is taken in many localities, even us fur north as Scotland, but is 
considered rather rare. The larva is green or reddish gray, with pale and slender lines of a yellowish tone, and a 
broad spiracular line of white. It feeds on grasses, This genus is by some formed into a distinct family (S¢i/bide), 
as presenting characters which render its locaticn with any other group very anomalous. 
