G4j HAUSTELLATA. — LEPIDOPTEUA. 



ably pectinated in the females; the latter sex is usually the largest; 

 the head has a distinct tuft of elongate scales at the base of each 

 antenna : — from Porthesia this genus may be knoM^n by the semi- 

 transparency and breadth of its wings, the different proportions of 

 the joints of the palpi, the comparatively greater length and nudity 

 of its legs, and the want of a downy mass at the apex of the ab- 

 domen in the females. 



f Sp. 1. Vau-nigra. Plate 16. f. 2. 9 • — -^l^s niveis, anticis V nigro parvo notutis, 

 (Exp. alar. <? 1 unc. 9 lin. : ? 1 unc. 10 lin.) 



Bo. Vau-nigrum. Fabricius. — Leu. Vau-nigra. Steph. Catal. No. 6012. 



Wings snow-white, with the nervures shghtly fuscescent, and a deep black 

 V-shaped spot in the centre of the anterior towards the costa, the point 

 looking towards the base of the wings : antennae with the shaft white, the 

 railii fulvescent : body and thorax white : legs white, slightly spotted with 

 black. 



Caterpillar dusky or rufescent, with wliitish lateral fascicles of hair, and eight 

 loose dorsal tufts, the two anterior and three posterior of which are whitish, 

 the rest rufescent ; the three anterior segments are thickly clothed with elongate 

 fascicles directed forwards: — it feeds on the lime in June, and the imago 

 appears in August : the pupa is greenish-blue, with a black spot on the thorax. 



Of this very rare insect I have hitherto seen but five specimens, 

 of which the collection at the British Museum, and those of Messrs. 

 Haworth and Vigors contain one each, and a pair is in that of Mr. 

 Swainson. Another specimen, I believe, was taken at Bromley, in 

 Kent, in August 1827, and is in a collection at Birmingham. 



Sp. 2. Salicis. Alis albo-nitidis, radiis antennarum nigris, pedibusque ati-o an- 



nulntis. (Exp. alar. $ 1 unc. 6 — 10 Un. $ 1 unc. 10 lin. — 2 unc.) 

 Ph. Bo. Salicis. Linne. — Don. i. pi. 30. — Leu. Salicis. Steph. Catal. No. 601S. 



Wings entirely of a rich glossy satiny- white : head, thorax, and abdomen of a 

 clear snowy white : antennte with the shaft white, the radii black : legs white, 

 annulated with black. Female usually largest; the abdomen stouter, and less 

 densely hairy. 



Caterpillar dusky, spotted with red, with an interrupted series of white dots 

 along the back ; hair fulvescent : it feeds on willows and poplars, and changes 

 in June to a hairy pupa, within a loosely constructed cocoon ; the imago 

 appears in about ten or twelve days : the eggs are protected by a brittle silken 

 substance. 



Very abundant in certain seasons in the neighbourhood of 

 London, committing great havoc amongst the poplars and willows ; 

 in plenty on the poplars near Chelsea, in July 1827, and in other 

 parts during the past season. 



