170 BRITISH BUTTERFLIES. 



xxxvii., p. 143) $ s of this form from Malta (May 17th and June 14th, 

 1902, and July 19th, 1901). Wheeler found it in 1901, at Bouveret, 

 Charpigny, Aigle, etc., the form being common at Charpigny, and near 

 Aigle and St. Triphon, and he expressly states (Ent. liec, xiv., 

 p. 58, 1902) that it is not confined to the 2 . Blachier notes (in lift.) 

 that the form is not uncommon around Geneva, but is more frequent 

 in the 2 than in the $ ; Reverdin records it from Versoix (July 21st, 

 1907). It occurs rarely in Belgium, and is recorded from Theux 

 (Mairlot), Verviers (June, 1906) (Boland), etc. Schima records it 

 from Oberweiden, in Austria, Grund from Croatia, Aigner-Abafi 

 from Budapest, Eperjes, etc., in Hungary^ where it is rare, 

 though occasionally found. In the British Museum coll. are a $ and 

 2 from Messina (Zeller), a 2 from the Cedars of Lebanon, August 

 26th, 1897 (Elwes), and other examples, which, however, have further 

 developments in the direction of basijuncta, costajuncta, etc. Buckstone 

 exhibited (Proc. South Lond. Ent. Soc, 1900, p. 108) a very small 2 

 of this species, the underside with the forewings of the melanotoxa 

 (arcuata) form = ab. minor-melanotoxa, n. ab. "Wheeler took a similar 

 specimen in the Abruzzi last July. 



u. ab. semiarcuata, Courv., "Mitt. Schw. Ent. Gesell.," xi., p. 20, pi. ii., 

 fig. 4d (right side) (1903); Gillm., "Ent. Zeits. Gub.," xviii., p. 2 (1904); Grund, 

 "Int. Ent. Zeits. Gub.," ii., p. 79 (1908); Gillm., op. cit., p. 154 (1908); Eebel, 

 "Berge's Sehmett.," 9th ed., p. 70 (1909). Polyphemus ab., Esp., " Schmett. 

 Eur.," L, pi. 1. (supp. xxvi.), fig. 2 (1779). Icarus ab., Bird, "Ent. Kec," 

 xviii., p. 280 (1906); Reuss, " Ent. Kec," xxi., p. 236 (1909). Subarcuata, Bell, 

 " Ent. Kec," xxi., p. 227 (1909). — The origin of the arcuate form of the mark that 

 distinguishes ab. arcuata, may be readily recognised in those specimens showing 

 an intermediate stage, i.e., in which the confluence is not complete. These may 

 be known as semiarcuata (Courvoisier). 



This is, perhaps, a commoner form than melanotoxa (arcuata), and 

 Courvoisier says that it predominates in the 2 • We have taken it in 

 various British localities, e.g., Deal, Cuxton, etc. Bird mentions a $■ 

 from Tintern (August 11th, 1906), Reuss a $ at Munden, Herts., 

 (September 1st, 1909), Bell, examples at Folkestone (September 11th, 

 1909), and there are many other records. Often the spechxiens appear 

 to have the incomplete arch made up of four spots, viz., a double lower 

 basal spot and a duplicated lower spot of the submedian series. As in 

 the last form, this also occurs in both sexes, we have $ s and 2 s from 

 Abries (August, 1900), 2 s from Susa (August, 1897), and Bourgd'Oisans 

 (August, 1896), etc. Blachier notes it (in lift.) as not uncommon in 

 the Geneva district, and Reverdin remarks (in lift.) its capture at 

 Versoix, July 25th, 1907. In the British Museum coll. there is a $ 

 of this form from Antioch, a 2 from Madeira, another 2 from Athens, 

 May 11th, 1900, whilst another 2 from Preston, England, is of the 

 blue form on the uppersiue. We have occasionally noticed specimens 

 with the arcuata character well-defined on one side, and semiarcuata on 

 the other. We have a very small example, captured at Courmayeur at 

 the end of July, 1894, of the semiarcuata iovm = minor-semiarcuata, n. ab. 



kk. ab. elongata, n. ab. [?Kebel, "Berge's Schmett.," 9th ed., p. 70 (1910) 

 nom. nud.] Icarus ab., South, "Ent.," xx., p. 75 (1887); Courv., " Mitt. Schw. 

 Ent. Gesell.," xi., p. 19, sect, a, pi. ii., fig. 2a (1903); Gillm., " Ent. Zeits. Gub.," 

 xviii., p. 1 (1904); "Int. Knt. Zeits. Gub.," i., p. 154 (1908).— The basal spots 

 of the forewings beneath elongated, not duplicated. 



Courvoisier mentions this form in sect, a of his " Former elongatie," 

 and notes it as occurring in both sexes ; the figure to which he refers 



