AGRIADES CORIDON. 41 



best type, a <? , was taken at Trafoi, August 13th, 1909. In the next 

 stage, our striata, the union of the basal and submedian spots with 

 the discoidal is too far advanced as a rule to exhibit the origin of the 

 streak. A similar development on both fore- and hindwings we 

 have called juncta, on the hindwings only postico-juncta (see antea, 

 p. 18). 



xjy. ab. striata, Tutt, "Brit. Butts.," p. 167 (1896); " Ent. Bee," ix., p. 80 

 (1897); Lamb., "Pap. Belg.," p. 240 (1902); Wheeler, "Butts. Switz.," p. 32 

 (1903); Pickett, "Ent. Bee," xv., p. 270 (1903); Bartel, "Ent. Zeits. Guben," 

 xviii., p. 115(1904); Krod., " Allg. Zeits. fur Ent.," ix., p. 54 (1904); Leonh., 

 " Ins. Borse," xxii., p. 128 (1905); Pickett, " Proe. Sth. Lond. Ent. Soc," p. 47 

 (1906); Lamb., "Cat. Lep. Belg.," p. 428 (1907); Bebel, "Berge's Schmett.," 

 9th ed., p. 72 (1909); Tutt, " Proc. Ent. Soc. Lond.," p. lxxx (1909). Corydon 

 var., Stphs., "Illus. Haust.," i., p. 89 (1828); Mosley, " Illus. Vars. Brit. Lep.," 

 pt. vii., pi. v., fig. 4 (1880). Corydon ab., Briggs, " Proc. Sth. Lond. Ent. Soc," 

 p. 80 (1887);- Barr., "Lep. Br. Is.," pi. xii., fig. 1ft (1893); Mosley, "Nat. 

 Journ.," v., supp., p. 9, pi. iv., figs. 2-3 (1896); Pickett, " Proc. Sth. Lond. 

 Ent. Soc," p. 114 (1902); Leonh., "Ent. Zeits. Guben," xviii., p. 54(1904). 

 Radiata, Courv., "Mitt. Schw. Ent. Gesell.," xi., pt. 1, p. 22, pi. ii., fig. 6a 

 (1903); Bartel, "Ent. Zeits. Gub.," xviii., p. 117 (1904); Kebel, "Berge's 

 Schmett.," 9th ed., p. 72 (1909), Tiphys, Seitz, " Gross-Schmett.," i., 

 p. 316 (1909). — With spots on the underside more or less united into streaks 

 (Tutt). 



This form was described to include those composite aberrations of 

 the underside of the species, which showed traces of union between the 

 spots of the submedian series of the fore- and hindwings and the 

 discoidal, the union of the basal spots with one another or with the 

 discoidal, the union of the marginal and submedian spots, the union 

 of the lower basal and submedian spots in arcuate and biarcuate form, 

 or the union of the costal spots on the hindwing and the inner 

 marginal on the hindwing. All these aberrations are more or less 

 frequent in occurrence, sometimes two or three forms included in the 

 same individual, and it was not considered desirable at the time to 

 separate the individual minor aberrations. Courvoisier dealt (Mitt. 

 Schw. Ent. Gesell., xi., p. 22, pi. ii., fig. 6) with this form of variation 

 under bis " Formas radiatae," his radiata a-b being merely a synonym 

 of our striata. Our real type of this form, or rather the specimen 

 which, when we described striata, we considered best illustrated the 

 striate form has the 2nd, 3rd and 4th submedian spots of the forewing 

 united to the discoidal, one of the basal streaks similarly joined thereto, 

 whilst the lower basal and lower submedian are extended and approach 

 the biarcuate form (see antea, p. 17). It is to this form in which the 

 submedian and basal spots unite with the discoidal that we would now res- 

 trict the name striata. Blachier gives us details (in litt.) of a good 

 example of this form, a $ , in which two of the streaks are confluent 

 with the discoidal (whilst in ab. antico -juncta they fall short), taken 

 on the Steinenalp at 1600m., August 14th, 1909, by L. Rehfous. 



w. ab. costajuncta, Tutt, "Ent. Kec," xxi., p. 300 (1909); "Proc Ent. 

 Soc. Lond.," p. lxxx (1909). Striata, Tutt, "Brit. Butts.," p. 167 in part 

 (1896). Corydon ab., Gillm., "Ent. Zeits. Guben," xix., p. 74 (1905).— The first 

 basal spot and the upper spot of the submedian row on the hindwing united. $ , 

 St. Gothard, August 3rd, 1907. 



aa. ab. basijwicta, Tutt, " Ent. Bee," xxi., p. 300 (1909); "Proc. Ent. Soc 

 Lond.," p. lxxx (1909). Corydon ab., South, "Ent.," xx., p. 7, pi. i., fig. 10 

 (1887). Striata, Tutt, " Britfc. Butts.," p. 167 in part (1896).— The penultimate 

 basal spot and the last two spots of the submedian row on the underside of the 

 iiindwing united. 



