338 BRITISH BUTTEKFUES. 



complete this common series, we may note the occurrence of ab. costa- 

 juncta, in which the first basal and upper submedian spots of hind- 

 wings are united, and ab. basijuncta, in which the penultimate basal 

 spot of the hindwings is joined to the penultimate spot of the curved 

 submedian row. In his "Formae confluentes multiplices," Courvoisier 

 notes an example in which the characters of ab.arcuata, ab. costajuncta, 

 and ab. basijuncta, are united, really a somewhat rare form of our ab. 

 conjuncta. Under the name ab. confluent, Aigner-Abafi describes (Ent. 

 Zeits. Guben, xix., p. 209) a specimen exhibiting the combined 

 characters of ab. arcuata, ab. disc oidalis- duplex, and ab. basijuncta. 

 The example figured by Oberthiir (Etudes, xx., pi. iii., fig. 28) is 

 very remarkable, the streaks on the forewings apparently being formed 

 primarily by the development of extra spots between the submedian 

 row and discoidal lunule on one side, and the basal spots and 

 discoidal lunule on the other, as in ab. addenda, and then the whole 

 of the spots secondarily united into longitudinal streaks. Montgomery 

 has a similar, but less highly- developed, example in his collection. 

 The finest example of the ab. addenda in our collection, has many 

 extra dots between the submedian row and discoidal, and discoidal 

 and basal spots on both forewings (see infra). The best example 

 of ab. striata that has come under our knowledge is that figured 

 by South (Ent., xxxiii., p. 281), in which every one of the normal 

 spots on the underside of all four wings is extended into a black 

 streak, so enlarged on the forewings that the ground colour of the 

 wings looks black, with pale nervures crossing as far as the 

 position of the normal submedian curved row of dots ; the specimen 

 was captured at Folkestone in July, 1900. A specimen, exhibiting 

 a combination of obsolete and striate characters, captured near 

 Eastbourne, September 5th, 1895, is noted (Proc. Sth. Lond. Ent. 

 Soc, 1895, p. 51), but the description there given is so vague, 

 that we obtained the specimen from Montgomery, to see for ourselves 

 its main characters. It has the basal spots of the forewings 

 practically obsolete, but is of the addenda form between submedian 

 spots 2 and 3 and the discoidal, whilst spot 5 of the submedian is length- 

 ened ; on the hindwings, submedian spot 1 is much extended, 6 also ; the 

 whole centre of the wing is spotless, and there are only two basal spots, 

 but the most interesting points about the specimen are (1) that the 

 white of the discoidal spreads over the whole central area of the wings, 

 whilst (2) the submedian series of spots are pushed back on the 

 marginal chevrons ; these latter, in the forewings, are broadly white, 

 with grey apices, in the hindwings also broadly white, but with orange 

 apices; the margin thus looks particularly pale = ab. mixta, n. ab. 

 The following are the described forms of the species with which we 

 have met — 



Male forms. 



a. ab. argentea, n. ab. Adonis ab., Obth., " Etudes," xx., p. 19 (1896). — <? . 

 Silvery-grey above, dark grey beneath, without red marginal spots. Austria 

 (Oberthiir). 



j8. ab. czelcelii, Aign.-Abafi, "Ent. Zeits. Guben," xix., p. 209(1906). Bell- 

 argus ab., South, " Ent.," xx., p. 80, no. 2 (1887); Webb, " Ent.," xxi., p. 133 

 (1888); Prideaux, "Ent. Rec," iii., p. 8 (1892); Hodgson, "Ent. Rec.," xviii., p. 

 53 (1906). Pallida, Tutt, " Ent. Rec.," iii., p. 8 (1892).— The normal sky-blue tint 

 of the upperside replaced by a blue-grey tint; on the underside, the marginal spots 

 of the hindwings very weakly developed. Taken at Puszta-Peszer, Com. Pest, 

 June 12th, 1898, by Dr. Czekelius (Aigner-Abafi). 



