352 BRITISH BUTTERFLIES. 



streaks through, ab. addenda is well shown in Oberthiir's figure. Two 

 almost exactly similar forms have been noted — (1) Briggs exhibited 

 (Proc. Sth. Loncl. Ent. Soc, 1894, p. 77), at the meeting of the South 

 London Natural History Society, held on November 8th, 1894, a $ 

 from Folkestone, in which the row of submarginal spots on the fore- 

 wings are developed into streaks, radiating towards the discoidal spot, 

 which, in turn, is connected by a streak with the basal spot. (2) 

 Aigner-Abafi notes (Ann. J\Ius. Nat. Hung., 1906, p. 516) a specimen 

 in the " Treitschke coll.," in which all the spots on the underside of 

 the forewings are more or less elongated, as well as those on the costa 

 of the hindwings. Courvoisier evidently only redescribes Oberthiir's 

 figure. Montgomery has an example in his collection closely allied to 

 subtus-radiata, in which, also, there is distinct evidence (as in Oberthiir's 

 figure) that the streaks uniting spots 2 and 3 of the submedian series 

 to the discoidal on the right forewing, are made up of united dots ; 

 extra dots between spots 1 and 4 of the submedian, are also present, 

 but not united into streaks ; on the left forewing, the streaks between 

 spots 2 and 3 of the submedian series and the discoidal, are still 

 better developed as streaks, but there are no dots between spots 1 and 

 4 and the discoidal; nor are there in this specimen, extra spots 

 between the basal spots and discoidal. An example is noted (Ent. 

 Zeits. Guben, xviii., p. 54) by Leonhardt as being captured June 3rd, 

 1904, at Hiiningen, and is described as a $ , in which the spots 

 forming the curved row on the underside of the forewings, are 

 elongated like drops towards the discoidal lunule, that in the space 

 between nervures III 2 and III 3 almost touching the latter. 



y. ab. postico-striata, n. ab. Striata, Tutt, "Brit. Butts.," p. 171 in part 

 (1896). — The underside of the forewings with normal spotting, the hindwings with 

 the spots of the submedian series elongated towards the discoidal spot. 



This form also was included in our striata, sens, lat., but if 

 the aberration with the spots of the forewings alone developed into 

 streaks, is to be separately named, that in which the spots of the hind- 

 wings alone are similarly developed, will want separate treatment. 



5. ab. semiarcuata, Courv., "Mitt. Schw. Ent. Gesell.," si., p. 20 (1903). 

 Striata, Tutt, "Brit. Butts.," p. 171 in part (1896). — Specimens in which the 

 confluence between the basal and lowest spots of the curved submedian row is not 

 complete, may be called semiarcuata ? (Courvoisier). 



A common aberration in both sexes, that was included in our 

 striata, sens. lat. Blachier and Reverdin note it as not at all rare in 

 the Geneva district. We have seen examples of the form arcuata on 

 one side, and semiarcuata on the other, as noted by Courvoisier. 



e. ab. costajuncta, n. ab. Striata, Tutt, "Brit. Butts.," p. 171 in part (1896). 

 — The* first basal spot and the upper spot of the submedian row on the underside of 

 the hindwing united. 



f. ab. basijuncta, n. ab. Striata, Tutt, " Brit. Butts.," p. 171 in part (1896). 

 — The penultimate basal spot, and the penultimate spot of the submedian row on 

 the underside of the hindwings united. 



i). ab. arcuata, Courv., " Mitt. Schw. Ent. Gesell.," xi., p. 21 (1903); Grund, 

 "Int. Ent. Zeits.," ii. ; p. 87 (1908). Tiphys, Esp., " Schmett. Eur.," pi. li. 

 (contd. i.), fig. 4 (underside) (1778). Striata, Tutt, " Brit. Butts.," p. 171 in part 

 (190(5). — The lower basal spot or spots united to the lower spot or spots of the 

 curved submedian row of the underside of the forewings (Courvoisier). 



Three more common aberrations of the underside of this species, 



