POLYOMMATUS ICAKUS. 165 



by a series of long dashes. Smith exhibited, at the meeting of the 

 Sth. Lond. Ent. Soc, held December 22nd, 1887, a fine irradiated 

 aberration of the underside. Adkin exhibited a specimen at the 

 meeting of the Sth. Lond. Ent. Soc, held July 9th, 1891, with 

 the submedian spots of the forewings elongated into black streaks, 

 and partially so on the hind wings. Pickett also records a $ in which 

 the spots on the underside are elongated, captured at Folkestone, 

 September 5th, 1903, whilst Joy exhibited, at the meeting of the Ent. 

 Soc. of London, held November 19th, 1902, another £ with the ocella- 

 tions developed into black stripes. There are many others in our best 

 British collections. The various externa forms correspond with 

 Courvoisier's sect, b of his "Formse elongatas" which he notes as 

 having the ocellated spots of the submedian row elongated, commoner 

 on the fore than on the hindwings though sometimes on all the wings. 



ip. ab. radiata, n. ab. Icarus ab., Warburg, "Ent. Bee," p. 329 (1891). 

 Icarus ab., sect, a Courv., "Mitt. Schw. Ent. Gesell.," xi., p. 22 (1903); Gillm., 

 " Ent. Zeits. Gab.," xviii., p. 1 (1904). Striata, Gillm., " Int. Ent. Zcits. Gub.," 

 ii., p. 154 (1908). — The elongation of the submedian to join the discoidal spots, the 

 basal sometimes extended and also united to the discoidal (Courvoisier). 



This is the extreme form in the direction of externa, i.e., the 

 extended submedian and basal spots reach the discoidal. There is, 

 however, no union between the submedian spots and chevrons of the 

 marginal lunules, the essential character of the striata series. It is 

 included in the sect, a of Courvoisier's " Formas radiatae," and copied 

 verbatim by Gillmer in his paper on Courvoisier's " Aberrationen der 

 Lycasniden." Warburg records (Ent. Rec, i., p. 329) the capture, at 

 Cannes, of a specimen with the spots elongated towards the base, the 

 3rd touching the discoidal. 



a. ab. striata, Tutt, " Brit. Butts.," p. 175 (1896); Wheeler, " Butts. Switz.," 

 p. 36, in part (1903) ; Clark, " Ent.," xxxviii., p. 261 (1905) ; Lamb., " Cat. Lep. 

 Belg.," p. 426 (1907); Gillm., " Int. Ent, Zeits.," ii., p. 154 (1908). Icarus ab., 

 Bead, "Trans. Ent. Soc. Lond.," p. 114, pi. xvii., fig. 2 (1853); Newman, "Brit. 

 Butts.," p. 128, upper fig. var. (1871); Courv., " Mitt. Schw. Ent. Gesell.," xi., 

 p. 22, pi. ii., fig. 6, a-b (1903); Gillm., " Ent. Zeits. Gub.,"' xviii., p. 2 (1904); 

 " Int. Ent. Zeits. Gub.," ii., p. 178 (1908). Radiata, Rebel, " Berge's Schmett.," 

 9th ed., p. 70 (1910). — With the spots on the underside more or less united into 

 streaks (Tutt). 



This name was given to the various forms in which the spots were 

 united into streaks. The most striking form that we included under 

 this title was that figured by Newman in his British Butterflies, p. 128 

 (top figure of the two abs. in the " Bond " coll.), and of which we 

 took two exactly similar forms at Upnor, in Kent, in June, 1874, 

 and it is to this form that we would now restrict the name. In 

 this form the submedian spots are united to the black chevrons 

 surrounding the orange spots on the fore- and hindwings, thus making 

 a series of black streaks on all the wings, the basal spots also elongated, 

 and sometimes, in extreme forms, united to the discoidal. It is to 

 this form that we would now restrict striata, as the other forms have 

 been since dealt with separately. Read's example, taken near Cambridge, 

 is not figured in all copies of the Trans. Ent. Soc. Lond., for 1853, 

 appearing only in some. It will be observed that our striata 

 thus limited is practically identical with Courvoisier's sect, b of his 

 "Formas radiatae," diagnosed as showing "confluence between the 

 Curved (submedian) and marginal rows of spots, and eventually 



