34 HAUSTELLATA, — LEPIDOPTERA. 



which also envelope the base of the wings : wings broad, subtriangular, entire, 

 somewhat diaphanous, pilose, without a dorsal prominence : cilia extremely 

 short: /eg-,s slender ; hinder tibiw with a minute pair of spurs at the apex 

 only. Larva naked, attenuated in front, with a pyramidal elevation at the 

 anal segment, and oblique lateral stripes: pupa folliculated, not subterranean. 



This beautiful genus was first characterized by Ochsenheimer, 

 in the fourth volume of his Schmetterlinge ; and shortly afterwards 

 Dr. Leach discriminated it as a genus, by the name Dorvillia, in 

 the Edinburgh Encyclopaedia, without characters, or being aware 

 of Ochsenheimer's labours, his work not having reached this country 

 at the time. It differs from all the foregoing by having the antennae 

 bipectinated in both sexes, the bipectinations being convoluted 

 and scarcely diminishing at the apex of the antennae, by the brevity 

 of the cilia, which are scarcely perceptible, by the width and 

 transparency of its wings, and by its densely-pilose thorax and 

 abdomen. 



Sp. 1. versicolora. AHs griseis, anticis strigis duabus lunuMque nigris albo 

 innatis, viaculisque tribus ad apicem thoraceque antice albis. (Exp. alar. $ 

 2 unc. 4 — 6 hn. : $ 2 unc. 10 hn. — 3 unc. 6 hn.) 



Ph. Bo. versicolora. Linne.—Entom. Trans. (NealeJ, \ 323. pi 8. ^, $ larva. 

 — En. versicolora. Steph. Catal. No. 5983. 



AntennfE black: male with the thorax anteriorly white, posteriorly fulvous, 

 mixed with whitish: abdomen fulvous, with a black patch on the second 

 segment : anterior wings with a white fascicle of hairs at the base ; griseous, 

 with two dusky-black strigae, the first before the middle bent outwardly, and 

 edged with white inwardly, the second behind the middle, flexuous and 

 biangulated towards the inner margin, and bordered externally with white : 

 between them is a black lunule, pointing outwards ; the hinder portion of the 

 wing is deep griseous, with three oblique, subdiaphanous, triangular, united 

 white spots at the apex, and each nervure on the hinder margin with a dilated 

 wedge-formed whitish streak: posterior wings tawny-orange, with an un- 

 dulated dusky striga, and central lunule, and a dusky patch on the anterior 

 margin, bordered posteriorly with white : female larger griseous- white, with 

 the thorax and anterior wings nearly as in the male, but paler : abdomen 

 whitish, with the second segment dusky. 



Caterpillar green, minutely speckled with black below, with obhque lateral 

 yellow streaks, a yellow line on the tliree anterior segments, and on the tail, 

 and yc How anterior legs : it feeds on the birch, alder, hazel, beech, and lime, 

 and appears in June : pupa brown, with a spine at the apex : imago appears 

 in April. 

 For several successive years I found the larvae of this beautiful 



insect at Darenth-wood, and succeeded in tracing their progress to 



perfection, but lost many from being unable to devote sufficient 



