26 BRITISH BUTTERFLIES. 



borussia shows strikingly if long series of the two are placed side by side. It is the 

 form of the Berlin district, and also that of Osterode in East Prussia. 



It happens that the Croatian cor id on (probably Poda's locality) is often 

 of this particular form (teste Grand), and the comparison, therefore, 

 with the " type" requires careful consideration. 



i. ab. torgniensis, Haverkampf, "Ann. Soc. Ent. Belg.," 1., p. 157(1906); 

 Lamb., "Cat. Lep. Belg.," p. 428 (1907). Corydon ab., South, " Proc. Sth. 

 Lond. Ent. Soc," p. 53 (1887); Sladen, " Ent.," xxx., p. 81 (1897).— A <? of the 

 normal colour ; it is known that the $ has no spots upon the wings, but that the 

 ? has always the discoidal spot, sometimes very strongly marked. I now possess 

 a c? of normal coloration, but which equally shows this spot, and, if the typical 

 colour of coridon were not present, one might suppose that some other species was 

 in question. 1 call this new aberration which was found on August 21st, at Torgny, 

 ab. torgniensis (Haverkampf). 



This is the well-known aberration in which the discoidal lunules of 

 the forewings are indicated in the $ . Haverkampf appears to have des- 

 cribed it, from a single Belgian example, as a very rare aberration. It is 

 not at all uncommon in some districts of Britain and the Continent, but 

 is rarer in others; bleak exposed districts, with a tendency to the 

 development of $ s with a less bright colour than usual, being more 

 than usually productive of this peculiarity (see antea, p. 10). Sladen 

 notes them as being fairly common in the Devizes district, and we 

 have examples from several localities both in England and on the Con- 

 tinent. The abs. minor, taken near the South Foreland in August, 

 1887, show several of the torgniensis form ; they also show a pale shade 

 on the hindwing, in the position of the discoidal lunule (Tutt). 

 Wheeler observes that he has this form from Guildford and from Assisi, 

 and it is almost racial in the spring brood on the French Riviera. 

 Two of the large marginata examples in the British Museum coll. are 

 markedly of this form. 



k. ab. suavis, Schultz, "Ent. Zeits-. Guben," xviii., p. 93 (1904); Bartel, 

 "Ent. Zeits. Guben," xviii., p. 115 (1904): Seitz, " Gross-Schmett.," i., p. 315 

 (1909); Rebel, " Berge's Schmett.," 9th ed., p. 72 (1909). Corydon ab., Meyer- 

 Diir, " Schmett. Schweiz," p. 86 (1852); South, "Ent.," xxxiii., p. 104 (1900); 

 Sladen, "Ent.," xxxv., p. 273 (1902). Corydon, Neust. and Korn., "Schmett. 

 Schles.," pi. xxi., figs. 69a-c (1842). Aurantia, Wheeler, "Butts. Switz.," p. 

 31 (1903). — Alis posticis supra rufomaculatis. On the upperside of the hindwings 

 there are, in many $ s of this species, reddish-yellow spots on the inner edge of 

 the black marginal spots, and in front of them, little black lunules, which are 

 wanting in the type. The reddish-yellow spots are seldom to be seen over all 

 the black marginal spots, generally only in cells 2 and 3. Silesia — Hertwigsdorf, 

 Hertwigswaldau, Oppeln ; Bavaria — Wiirzburg, Kitzingen ; Upper Alsace — 

 Hiiningen. In Switzerland (teste Wheeler) not scarce ; at Esino about 20 per 

 cent. Wheeler is disposed to regard this as the J form of ab. aurantia, Tutt. 

 This opinion, however, appears risky, and it is striking that, at the places where 

 ab. suavis occurs, ab. aurantia was not found, nor is the opposite the case 

 (Schultz). 



The form is uncommon in Britain, but occurs on the Dorset const, 

 near Swanage, etc., in Surrey at Tleigate, in Sussex in the Brighton 

 district, in Kent on the Hailing downs, Dover, etc. It was noted by 

 Meyer-Diir, in 1852, as occurring in the Yalais, and as being specially 

 common at fSion and Grengiols. Wheeler noted it as not infrequent in 

 Switzerland. Rowland-Brown observes that the $ s taken near Mende, 

 Lozere, are similar to those taken at Esino, near Yarenna, by 

 Miss Kountaine, and belong to the form in which the orange spots 

 surmounting the hindwing marginal ocellations are strongly marked. 



