422 BRITISH LEPIDOPTERA. 



at nervure 2. The antennae are about 3mm. long, and consist of 19 

 joints, the first large and urn-shaped, the second urn-shaped but smaller 

 and more globular, the third very short and with very short pectina- 

 tions ; the latter reach their full length on about segment 7 and 

 diminish from about segment 16 ; the last segment may or may not 

 carry pectinations, but usually does so ; from 3 to 16 the joints gradually 

 increase in length from 'lmm. to about *25mm., and diminish in width 

 from -13mm. to -10mm. ; the largest pectinations are about -45mm.; 

 the pectinations arise from the middle of the segments or the ends if 

 allowance be not made for their sloping origin ; the joints and pectina- 

 tions are clothed dorsally (outward or upward aspect ?) with long 

 (•2mm.) hair-scales ; ventrally they carry sense-hairs, which are very 

 small as compared with those of, say, A. opacella, being about '03mm. 

 in length ; the pectinations are curiously notched for the origins of 

 hairs and scales, and are deeply wrinkled transversely (as in Proutia, 

 but more markedly) . How far the wrinkling is normal or the result 

 of drying is not easily decided. The haired under-surface of the joints 

 is very pale, smooth, and transparent, contrasting with the wrinkled 

 pectinations. The number of hairs is not easy to count, perhaps 100 

 hairs to a pectination and 30 to an antennal joint. The scales are not 

 in definite transverse rows. The general aspect of the antennal struc- 

 ture suggests a distinct step to tbat in Apterona. The legs have some 

 long hairs on femur, the remaining joints clothed sparsely with very 

 narrow scales, which are almost fine bristles on the prominent ridges and 

 at the ends of the tibia and tarsi ; first and third legs without spurs, a very 

 minute one at end of second tibia ; first tarsi longest, third tarsi shortest 

 — lst = l-6mm., 2nd = l , 3mm., 3rd = -9mm. $. Hofmann describes 

 a blown female received from Reutti as follows : Length 3 lines, breadth 

 1£ lines. The small head is pointed upwards and is very much over- 

 lapped by the thorax ; the latter is unicolorous, yellow, corneous, 

 and shiny, and without any darker shading and with scarcely any 

 divisions between the segments. The abdomen is swollen, with a 

 rounded end of a yellowish -white colour. Heylaerts notes it as 

 " vermiform ; head and thorax very small, abdomen very large and 

 thick and of a brownish-yellow colour. The head, on which mouth- 

 parts are entirely wanting, is roundly flattened off. The eye-patches 

 form two black spots in the ordinary position ; the antennas consist of 

 two segments, the basal thicker than the upper segment." 



Variation. — This species is not, apparently, subject to any varia- 

 tion except in size. Our British race (fusca) appears to us to be 

 practically identical with the continental specimens examined. 



a. var./usca, Haw., "Lep. Brit.," 2, p. 157 (1809) ; Stephs., "111. Brit. Ent.," 

 ii., p. 80 (1829) ; Curt., " Brit. Ent.," no. 332 note (1830).— Nudaria (The brown 

 muslin) alis pallide fuscis, antennis pectinatis. Habitat prope Londinum, at 

 rarissime, cum penultimo (munda). Exp. alarum 9 lin. Tota fusca. Antennae 

 valde pectinatse, radiis distantibus plumosis. Alte angustiores quam in prasce- 

 dentibus (rotunda et munda), anticas fere ut in Hepialis, at nudaa et lucibus certis 

 quasi plicatas, omnino dilute fuscescentes, concolores, immaculatee. Pupa utrinque 

 obtusa, castanea, segmentis magnis turgidis (Haworth). 



Curtis says that the insect has been caught at Hornsey Wood and 

 Highgate on hazel, sallow, and oak leaves, at the end of June and 

 beginning of July, the perfect insect appearing at the latter period ; 

 also taken at Winchmore Hill in June. Stephens quoting Ingpen, 

 notes that this insect was first observed in Britain in the summer of 



