142 BEITISH LEPIDOPTERA. 



well-marked, whilst no plates are noticeable in the larva of S. 

 lichenella (Bacot). [The S. lichenella here compared, is the partbeno- 

 genetic form from Wellington College.] 



Pupa. — The pupa is pale brown in colour, and the intersegmental 

 folds of the movable incisions only somewhat darker. Laterally : The 

 dorsal head-piece stands out frontally, the prothorax depressed, the 

 front of the meso'thorax rises suddenly, but is not markedly developed 

 medially, the metathorax and all the abdominal segments form a some- 

 what regular convex line along the dorsum, rising most at the 3rd and 

 4th abdominal segments, the metathorax scarcely falling below the 

 line of this curve. The wings stand out prominently laterally, owing 

 to depression on metathorax at base of wings, eyes bulging ; antenna 

 rising at point where dorsal head-piece meets prothorax laterally. Tbe 

 spiracles exceedingly minute, placed towards the front of each segment, 

 the scar on 8 especially well-developed. The strongly-developed seta?, 

 iii and iv, on chitinous buttons, the dorso-anal spikes very prominent. 

 The wings reach to the end of the 6th abdominal, the 3rd pair of legs 

 to the end of the 7th. The genital organs marked by prominence on 

 anterior part of the 9th abdominal segment. Dorsally : The prothorax 

 frontal, but not so far forward as the dorsal head-piece. The meso- 

 thorax moderately well-developed. The 1st abdominal narrow (front 

 to back), the 2nd and 3rd depressed transversely across the middle of 

 the segments. The 4th-7th covered with small rough points towards 

 the front margin, more thickly placed towards the anterior edge. The 

 intersegmental membranes between 2-3, 3-4, 4-5, 5-6, 6-7, 7-8 distinct 

 and smooth ; abdominal segments 8-10 united into a single mass. 

 The spiracular (iii) and subspiracular (iv) seta? stand out conspicuously ; 

 the dorsal tubercles i and ii with chitinous bases. The 10th abdominal 

 segment rounded, with two dorso-anal spikes, a long recurved hair just 

 outside the base of each. The anus practically dorsal. The wings 

 have a less prominent appearance than in lateral view. Yentrally : 

 The dorsal head-piece prominent (placed frontally and not ventrally). 

 The eyes darker (facets of imaginal eye showing through the skin) ; 

 distinct lunular glazed eye at base of antenna, and outside the 

 true ocellar area. The labrum with two hairs on either side ; 

 the labium, labial palpi, maxilla? and maxillary palpi well-developed. 

 The 1st pair of legs and somewhat slender antenna? end together 

 (at a point that appears to be the costal commencement of Poulton's 

 line, but may be the edge of hindwing showing through), the 2nd pair 

 ends at the apex of the forewings, whilst the 3rd pair reaches to the 

 end of the 7th abdominal. The ends of the wings and legs quite free 

 from the abdominal segments. The male genital organs very conspic- 

 uous, forming a swollen boss on the front part of the 9th abdominal. 

 [Described June 14th, 1899, from pupa? sent by Mr. Griffiths and collected 

 at the Cheddar Eocks.] The square dorsal head-piece more than 

 twice as large as prothorax, the wing-cases to the end of the 6th 

 abdominal segments (7th in the male if shrivelled and in the ? to end 

 of 5th) ; antenna? to end of 1st pair of legs (about the 4th abdominal 

 segment) ; the 2nd pair to end of wings ; the 3rd pair extends the 

 width of a segment beyond the wings. (In the ? the 2nd pair goes to 

 end of wings and the 3rd pair a segment and a half beyond, the 1st pair 

 and antenna? reaching to the end of the 2nd abdominal. There is no 

 ventral impression for the legs beyond the 5th segment in the ? ) . 



