168 BRITISH LEPIDOPTERA. 



S'. pineti, otherwise very similar to it. Towards the anterior end it is 

 thinner, with a distinct dorsal keel, and with somewhat distinct lateral 

 keels only noticeable posteriorly. 



Larva. — Stainton describes the larva as " yellowish-grey ; head 

 blackish ; 2nd segment black ; 3rd and 4th segments each with two 

 black spots above " (Manual, ii., p. 286). Durrant sends us from Stain- 

 ton's MS. (F. 607) what is evidently an extended description of this larva. 

 It reads : " Yellowish-grey, more yellowish posteriorly ; head black ; 

 2nd segment black ; 3rd segment blackish with central pale line ; 4th 

 segment with a black spot on the upper part and side ; 3rd and 4th 

 segments with a blackish spot above the legs, other spots pale greyish, 

 nearly the colour of the body ; anal segment blackish above, a black 

 spot on the side of the anal prolegs ; legs blackish. Long. 5"5mm. 

 Dunham Park, on beech, from Edleston, January 20th, 1859" [vide 

 EdL, Ent. W. Int., v., p. 147 (1859) ; ZooL, xvii., 6463 (1859) ; 

 Ent. W. Int., vi., p. 28 (1859) ; Sta., Ent. Ann,, 1860, p. 150. This 

 is the larva of the insect referred to as "the two-year species," from 

 which only ? specimens were bred ; Stainton' s fig. b. 10 is so like the 

 fig. b. 12 that it had better be referred to S. inconspicuella, provision- 

 ally (Durrant)] . Durrant also sends us a second description from Stain- 

 ton's MS. (F. 604), which refers to the form from which both sexes were 

 bred by Edleston : " Greyish- white ; head dark brown (not black); 2nd 

 segment blackish (not black) ; 3rd segment dark grey above with a 

 central pale line ; 4th segment with a grey spot on the upper part of 

 the side ; 3rd and 4th segments each with a blackish spot above the 

 legs ; other spots very pale ; anal segment with a pale brown spot 

 above; legs blackish. Long. 6mm. Prestwich, on beech, from 

 Edleston, February 12th, 1859" [vide, EdL, Ent. W. Int., v., pp. 

 146-7 (1859); Sta., Ibid., p. 147; EdL, ZooL, xvii., 6462-3 (1859) ; 

 Sta., Ent. Ann., 1860, p. 153] . Hofmann describes the larva as 

 "yellow, with brown warts, and black head and legs; the first two 

 segments with dark brown dorsal plates, divided medially by a narrow 

 line, the metathorax with two small corneous spots ; the anal seg- 

 ment brown." 



Pupa. — ? pupa (from Brentwood) already dehisced, protrudes from 

 the case to the end of the 7th abdominal segment. Pale brown in 

 colour, shiny, the dorsum not markedly darker than the venter. Some- 

 what rounded frontally, largest at the 2nd abdominal segment, some- 

 what convex dorsally, the anal segment blunt. The prothorax narrow, 

 frontal ; the mesothorax well developed, with slight median ridge 

 from front to back ; the metathorax fairly well developed, about the 

 same width as the 1st abdominal, the 2nd, 3rd and 4th abdominals of 

 almost ecmal bulk, from the 5th to anal segment gradually decreasing 

 in size. The forewings moderately developed, extending to end of 2nd 

 abdominal, the hind margin of hindwings also visible ; the antennas 

 short but prominent ; dorsum of the abdominal segments almost 

 covered with minute black points ; a broad transverse dorsal band of 

 well- developed black spines on abdominal segments 2-7, anterior to 

 tubercle i, and standing on a raised band of the segment ; tubercles 

 (each with a long white seta) evidently as in larva, i and ii trape- 

 zoidal, iii supraspiracular, iv and v (close together and in the same 

 longitudinal line) subspiracular ; abdominal segments 3-6 movable, 

 7-10 in one mass ; the seta? on latter modified into long recurved 



