24 



BRITISH BUTTERFLIES. 



Schmett.," i., p. 316 (liJOO); Kebel, "lieiye's Schmett.," 9th ed., p. 72 (1909). 

 Corydon var., Barr., "Lep. Brit. Is.," i., pi. xii., fig, lb (1893); ? Mosley, "Nat. 

 Journ.,'' v., supp., p. 10, pi. iv., fig. 8 (1896). — J . Ground colour silvery-blue, 

 with broad dark unspotted marginal bands (Tutt). 



This is the opposite form to punctata, for, whereas in the latter 

 the fore wings carry on, as it were, the interneural ocellations normal 

 on the hindwings, in this form the forewing has a broad black unspotted 

 margin, whilst the hindwings may have the normal ocella- 

 tions partially obliterated, and their position partly occupied by a dark 

 marginal band that tends to absorb them, so that both fore- and hind- 

 wings are somewhat similarly marked with a dark marginal band. The 

 form is not uncommon in most British localities for this species — 

 Cuxton, Dover, etc. It also occurs frequently abroad, <?.//., France — Bourg 

 d'Oisans, etc.; Hungary — Budapest and Isaszegh (Aigner-Abafi), etc. 



6. ab. (et var.) marginata, Tutt, "Brit. Butts.," p. 166 (1896); "Ent. Rec," 

 ix., p. 80 (1897); Grover, " Ent. Rec," i.x., p. 312 (1897); Lamb., "Pap. Belg.," 

 p. 239 (1902); Bartel, " Ent. Zeits. GubeiV xviii., p. 115 (1904); Haverk., "Ann. 

 Soc. Ent. Belg.," 1., p. 156 (1906); Lamb., "Cat. Lep. Belg.," p. 427 (1907); 

 Grund, " Int. Ent. Zeits. Guben," ii., p. 87 (1908); Seitz, " Gross-Schmett.," i., p. 

 315 (1909); Tutt, " Ent. Rec," xxi., p. 800 (1909). Corydon var. y, Stphs., " Illus. 

 Haust.," i., p. 89(1828). Corydon var., South, " Ent.," xx., pp. 2, 49 (1887); 

 Weir, "Ent.," xx., p. 265(1887); Obth., " Etudes," xx., pi. iii., fig. 32 (1896); 

 Courv., "Soc. Ent.," xii., p. 26 (1897); Buckstone, " Proc Sth. Lond. Ent. 

 Soc," p. 109 (1899); Pickett, "Proc. Sth. Lond. Ent. Soc," p. 114 (1902); 

 Leonh., "Ins. Borse," xxii., p. 124 (1905). Nujrocosta lis, Schultz, " Jahresb. 

 d. Wien. Ent. Ver.," xvi., p. 77 (1905); Rebel, "Berge's Schmett," 9th 

 ed., p. 72 (1909). Seminigra, Preitsck., " Verh. z.-b. Ges. Wien," lvii., p. 87 

 (1906); Rebel, "Berge's Schmett.," 9th ed., p. 72 (1909). Borussia, Dadd, 

 "Berl. Ent. Zeits.," liv., p. 36 (1909) ; Linst., op. cit., p. 237 (1909); Gillmer, 

 " Ent. Rec," xxi., p. 261 (1909).— ^. With a distinct broad, darker border to 

 forewings, and interneural spots on hindwings (Tutt). 



This is a rather striking form of this species. The interneural spots 

 on the hindwings are sometimes faint,but usually large and well developed, 

 on the forewings they are lost in a wide black border, which is in- 

 creased strongly towards the costa in the form of dark shading, reaching 

 to, or almost to, the discoidallunule, which is sometimesdistinctly marked. 

 It must not be confused with the type (also a wide-margined form, 

 described from Croatian examples [Gratz] by Poda, as having a "black 

 marginal fascia," in which, however, the margin is cut sharply 

 off from the ground colour, and not somewhat suffused on its borders 

 as is the case in marginata. It occurs somewhat rarely in western 

 Europe, England, France, Italy, Switzerland, etc., but becomes almost 

 racial in certain parts of Germany, Austria, Bosnia, etc. In Britain 

 it occurs as a rare aberration at Dover, Cuxton, Eastbourne, Ventnor, 

 etc., and Buckstone notes a £ with the borders of the forewings darker 

 and broader than usual, taken at Sevenoaks in August. ]s ( .>7. 

 Oberthur figures an example from Vernet-les-Bains, in his Etudes, 

 xx., pi. iii., fig. 82. Courvoisier records (Soc Knt., xii.. p. k 2(>) the 

 capture of a j on the Simplon in 1895 with almost a half of the 

 forewings forming a dark band. Lowe states (in litt.) that near 

 Chur, at the foot, of the Mittenberg, on August 2nd, ls<)5, A. coritlon 

 was plentiful, beautifully fresh, large, unusually dark-bordered and 

 witb dark suffusion on bhe disc of the forewings; thai with this 

 noticeably fine, newly-emerged race were smaller A. <<>ri<l<>>i, of a 

 light pale colour, with very narrow border to the forewings and very 

 worn. In the Dolomite region of the Tyrol, we observed a much 



