NEPTICULA SORBI. 289 



disappears at the incisions, the latter being more deeply tinted with green 

 than the rest of the body. The 8th abdominal segment, which is 

 considerably swollen, presents a pair of these spots, one on either 

 side of the median line. These spots are not surface spots, for the shiny 

 surface of the transparent integument is seen to be quite distinct some 

 distance above them, and one looks through the skin at the spots. 

 The anal flap projects considerably beyond the preceding abdominal 

 segments, which are cut off sharply ventrally. [Described under a 

 two-thirds lens on June 21st, 1898, from a larva sent by Mr. A. F. 

 Griffith, from North Uist.] Nolcken notes the full-grown larva as 

 " transparent, glassy, very pale green, frequently almost colourless; 

 the head pale brownish -yellow." 



Cocoon. — The cocoons (7) examined average 3 mm. long and 

 2-1 mm. wide, and are spun on upper side of a leaf of Pyrus aucuparia. 

 The cocoons are roughly oval in outline, but some have one end so 

 much wider than the other, and the narrow end so pointed, as to be 

 almost pear-shaped. The broader end is considerably flattened, and 

 has a slightly turned-up edge. The arched portion rises rapidly from 

 one of the long sides and the narrow end, less rapidly from the other 

 long side and the broader end, and reaches a considerable height at the 

 apex, which is towards the long side, from which the ascent is most 

 rapid. The cocoon is bright deep brown in colour, with a consider- 

 able quantity of loose flossy silk especially around the rim. [Described 

 July 20th, under a two-thirds lens, from cocoons sent by Mr. W. H. B. 

 Fletcher.] 



Food-plant. — Pyrus aucuparia. 



Time of appeahance. — The species is single-brooded. Nolcken 

 found larvse from June 20th to the beginning of July, but although 

 the cocoons were kept in a warm room no emergences took place until 

 late spring of the following year. Bower found larva? on June 10th, 

 28th, and July 13th, 1892, at Bichmond, Yorkshire. Sang found them 

 in the same locality on July 13th, 1862, June 10th, 1874, June 27th, 

 1874 (teste Gardner). Griffith sent mines containing many full-fed 

 larva from North Uist on June 18th, 1898 ; whilst Jobson captured 

 imagines at Torwood on May 31st, 1851. Hering strangely gives the 

 commencement of September as the time for the larva in Pomerania, 

 a date that suggests either a double-brood or an error on the part of 

 the observer. Threlfall obtained imagines on May 14th, 1875, from 

 larva? obtained July-August, 1874, at Witherslack. He also captured 

 imagines on the wing May 14th, 1875, at Witherslack. 



Localities. — Durham (Sang). Hereford : Tarrington (Wood). Inver- 

 ness: North Uist (Griffith). Lancashire: Preston, Longriclge (Threlfall). Nor- 

 folk: K. Lynn (Atmore). Stirling: Torwood (Jobson). Sussex: Guestling 

 (Bloomfield). Westmorland : Windermere (Hodgkinson), Witherslack (Threlfall). 

 Yorks : Richmond (Bower), Scarborough (Wilkinson). 



Distribution. — France: Mont Dore, Auvergne(Sand). Germany: 

 Silesian and Hercynian mountains (Wocke), Friedland and Bruns- 

 wick (Sorhagen), Hartz and Sudeten mountains (Heinemann), 

 Alt Damm, Sandsee (Hering). Bussia : Finland (Wocke), Pichten- 

 dahl (Nolcken). Scandinavia: Blekinge (Wallengren). 



NEPTICULA ARGENTIPEDELLA, Zeller. 

 Synonymy. — Species: Argentipedella, Zell., "Isis," 1839, p. 215; "Linn. 

 Ent.," iii., p. 31G (1848) ; Tengs., " Bidrag till Finl.," 1847, p. 152 ; Sta., " Sys. 



