NARYCTA MONIUFERA. 141 



abdomen is large, soft, and bulky ; the prolegs small and weak ; the 

 hooks being arranged on short stumps as in the higher Psychids, but 

 the oval (horseshoe) arrangement of hooks on prolegs 1-4 is less complete, 

 having a larger gap on the inner side ; there appears to be no pit in 

 the centre of foot. A row of dark spots are present on ventral area, 

 apparently the nervous ganglia. The position of the large dorsal 

 vessel can also be distinctly made out. The hairs are weak and faint 

 (especially on abdomen), and are either very transparent or of the 

 same colour as the skin ; on the thorax they are stronger and white. 

 The tubercular setae on abdominal segments and metathorax are 

 arranged in trapezoidal form, the tubercles on abdominal segments 

 with fairly large basal plates, but proportionately not quite so large as 

 in the higher Psychids. On the metathorax the plate bearing i is 

 small, and the hair small ; the plate bearing ii is very large as a plate 

 and carries a larger hair ; this plate (ii) is brown, that carrying i and those 

 on abdominal segments are of the skin colour. On the abdominal seg- 

 ments the plate at base of i is smaller than that at base of ii ; seta on 

 ii fairly long and easily seen, that on i very small and inconspicuous ; 

 i is nearer to median line of dorsum, ii more remote (in this it agrees 

 with Tineids, Zeuzerids, &c). The lateral flanges are well developed, 

 and, though conspicuous, do not bulge very much. The spiracles are 

 situated above the lateral ridge, small, nearly circular, with a raised 

 chitinous ring. A supraspiracular tubercle, iii, and seta, are present, 

 the hair fairly long, about equal in length to that on ii ; iv and v are 

 rather far below the spiracle and at about equal distances from it, 

 they are placed near each other as in true Psychid larvae, the anterior, 

 v, is very small, the posterior, iv, larger, nearly equal to iii in size. 

 True legs (like the thorax) are weaker in relation to size of abdomen than 

 in Macro-Psychids. The larva is restless, wriggles much when being- 

 examined, but the abdomen is too bulky for it to be very active ; some 

 of its movements are very suggestive of the backward wriggle usually 

 associated with Tortricid larvae [Bacot. Described April 30th, 

 1899, larvae from Dr. J. H. Wood] . Larvae from the Cheddar Eocks 

 are described as " short, stout, with large bulky abdomen and slender 

 thorax, the head and thorax making up quite one-third of the total 

 length, although these parts of the body are probably less than one- 

 fifth in bulk. The anal segment, brown-black and chitinous, the plates on 

 abdominal segments 8-9 dark-coloured, brown, and hence prominent. 

 The head small, black, and glossy, a few hairs present, the antennae 

 rather conspicuous." Fischer notes the larva as "pale brown in 

 colour, the thoracic segments dorsally dark brown ; the head and anal 

 segment black ; the tubercles widely distant, brownish." The larva 

 was well studied and figured by Mann, the drawings being reproduced 

 by Fischer von Roslerstamm. 



Comparison of the larvae of Narycia monilifera and Solenobia 

 (?) lichenella. — The larva is larger, and in some more respects 

 Psychid-like than that of S. lichenella. The abdomen has, however, 

 not become very markedly Psychid, whilst the head, thorax, and legs are 

 relatively larger and stronger. The lateral ridges are more regular 

 and better marked than in the larva of S. lichenella, and, although 

 the hairs appear to be of about equal length, those of N. monilifera 

 show up more clearly, perhaps because rather thicker or darker- 

 coloured. The chitinous plates at the base of the hairs are large and 



