186 BRITISH BUTTERFLIES. 



0. ab. approximata-juncta, n. ab. — A ? specimen in our collection shows the 

 line of development of the above form, the two series of spots being elongated, and 

 approaching one nnother so as nearly to unite but only doing so in two instances ; 

 it thus just falls short of becoming ab. juncba. Captured July 31st, 1907, in the 

 Goschenen-Thal. 



i. ab. ol'zoleta-junrta, n. ab. Atqus ab., Krod., " Allg. Zeits. fur Ent.," ix., 

 pp. 49, 53, 109, 137, fig. 20 (1904). — Forewings with all the spots on the underside 

 obsolete, except the discoidal ; the hindwings with eight well-defined streaks 

 formed by the union of the black inner margins of the, orange lunules with the 

 spots in the submedian series as in ub. juncta. 



The type of this aberration is figured by Krodel (Allg. Zeits. fur 

 Ent., ix., p. 53, fig. 20). The discoidal spots present in all wings, and 

 three basal spots in hindwings. He notes it (op. cit., p. 187) as a $ , 

 and adds (p. 109) that it was the result of a low temperature experi- 

 ment. He gives some details (p. 49) of the experiment which was 

 performed on five pupse, from which no fewer than three aberrant 

 specimens emerged, of which this was one. [Krodel's reference of 

 Herri ch-Schaffer's fig. 247 to this species, instead of to P. argyrog- 

 nomon, is evidently an error; Oberthur figures this aberration (Etudes. 

 xx., pi. iv., fig. 53) as P. arggrognomon ab. subtusradiata, in accord- 

 ance with Herrich-Schaffer's indication.] 



k. ab. cuneata, n. ab. — Forewings Avith the spots obsolete, even the marginal 

 series being only faintly indicated. The hindwings with the spots also obsolete, 

 except that the black inner marginal arches of the obsolescent orange lunules are 

 developed into a series of c ineilorm streaks, which are only faintly indicated on 

 forewng. The specimen described was taken at Berisal, on June 29th, 1906, by 

 Mrs. Pridcaux. 



This differs entirely from the last-describpd form, in that the 

 streaks are not made up by the union of the spots in the snbmedian 

 and submarginal series of black spots, but by the extension of the 

 latter (the inner black edges of the orange lunules) only, the former 

 being entirely absent. 



>. var. leodorus, Gerh., " Mon. Schmett.," p. 13, pi. xxiii., figs, a-c (1853); 

 Wllgrn , " Skand. Dagf.," p. 207 (1853). — Has no silver spots on the underside 

 (Gerhard). 



The illustration represents a moderate-sized form, the $ slightly 

 larger than the $ . The $ is of a brigbtish purple-blue, with broad, 

 well-defined, black border ; the $ bright dark brown, with an orange 

 lunular band on the hind wing, and a narrower, less distinct, and less 

 lunular band on the forewing ; the underside of the $ shows a bright 

 orange band within the black marginal spots, followed by a clear 

 broad white band on the hindwing, and a series of small white wedge- 

 shaped spots on the forewiug ; the ground colour is a coffee-brown ; 

 no metallic spots. The underside of the $ is not represented, but it 

 is described as being without silver spots. The $ is in colour, size, 

 and breadth of border, almost a facsimile of the type specimen in the 

 Linnean collection, except that, the border is less sutmsed, and thai 

 there are no metallic spots beneath ; the underside of the ? also 

 corresponds, with the same exception, to Linne's $ , but the upperside 

 of the Litter sex has, in Gerhard's insect, much more orange than in 

 Linne's "idas" (Wheeler). 



Uppeksidk abkrrations. 



a. ab. (dcippe, Stphs., "Ins. ("at.," pt. ii., p. 25 (1829J; Dale, "Hist. Brit. 

 Butts.," p. 79(1890). Argua var. /I Stphs., " lllus. Haust.," i.. p. 94(1828). 

 Argus var. £, Pa. aleippe, Kirby MBS. (Cat., p. 25). / • Smaller, the wings 



