POLYOMMATUS ICARUS. 171 



shows only the lower basal spot lengthened. Similarly Gillmer in 

 dealing with Courvoisier's paper only notes the aberration as one of 

 the " Format elongatse." It is not at all uncommon in various 

 localities ; South notes it from Ventnor, etc., and Reverdin observes 

 (in litt.) that, in Swiss specimens, especially the $ , the posterior basal 

 point is often elongated in the form of a javelin. In the British Museum 

 coll. are 2 s from Bulgaria, Broussa, and Ehodes, in which the lower 

 basal spot is elongated in each case ; there is also a 2 from Sarepta 

 that is elongata on one side and tripuncta on the other, another 2 from 

 Tangier, quadripuncta on one side and elongata on the other. 



XX. ab. tripuncta, Courv., " Mitt. Schw. Ent. Gesell.," xi., p. 22, pi. ii., fig. 

 la (1903); Gillm., "Ent. Zeits. Gub.," xviii., p. 2 (1904); "Int. Ent. Zeits. 

 Gub.," ii., p. 178 (1908); Rebel, " Berge's Schmett.," 9th ed., p. 70 (1909). 

 Icarus ab., Nolck., " Lep. Fn. Estl.," p. 56 (1868); South, "Ent.," xx., p. 75 

 (1887); Kroul., "Rev. Russ. Ent.," iii., p. 111(1903). Tripunctata, Fritsch, 

 "Berk Ent. Zeits.," liv., p. 234 (1910).— With three basal spots on the underside 

 of the forewings (Courvoisier). 



Gillmer notes this as being common in Germany in both sexes. It 

 certainly is so in the British Isles; South notes it from Ventnor, etc. 

 In the British Museum coll. are $ s from Bagovitza, the Rilo Dagh 

 Naples, etc. Kroulikowsky records it from Ourjoum, in the Viatka 

 Government. 



jAfjt,. ab. quadripuncta, Courv., " Mitt. Schw. Ent. Gesell.," xi., p. 22, pi. ii., 

 fig. lb (1903) ; Gillm., " Ent. Zeits. Gub.," xviii., p. 2 (1904) ; " Int. Ent. Zeits. 

 Gub.," ii., p. 178 (1908); Rebel, "Berge's Schmett.," 9th ed., p. 70 (1909). Icarus 

 ab., South, "Ent.," xx., p. 75 (1887); Bird, "Ent Rec," xviii., p. 280 (1906). 

 Tetrapunctata, Fritsch, " Berl. Ent. Zeits.," liv., p. 234 (1910).— With four basal 

 spots on the underside of the forewings (Ccurvoisier). 



This is a not uncommon form of aberration in this country — e.g.> 

 Tintern (Bird), Ventnor (South), Cuxton, Folkestone (Tutt), etc. 

 Gillmer also notes it as common in Germany in both sexes. 



w. ab. quinqwpuncta, Courv., "Mitt. Schw. Ent. Gesell.," xi., p. 22 (1903); 

 Gillm., "Ent. Zeits. Guben," xviii., p. 2 (1904); "Int. Ent. Zeits. Guben," ii., p. 

 178 (1908); Rebel, " Berge's Schmett.," 9th ed., p. 70 (1909). Icarus ab., South, 

 "Ent.," xx., p. 75 (1887). — With five basal spots on the underside of forewings 

 due to the lower basal spot giving rise to three spots (Courvoisier). 



Courvoisier only notes this in a single $ ; whilst South records a 

 similar example from Ventnor. 



££. ab. multipuncta, n. ab. [? Rebel, " Berge's Schmett.," 9th ed., p. 70 

 (1909).] — Evidently meant to include those examples with more than five basal 

 spots to the underside of the hindwings. Rebel merely gives the name without 

 description, and as if Courvoisier had used it for this species, which is not the case. 



oo. ab. costajuncta, Tutt, " Ent. Rec," xxii., p. 51(1910). Icarus ab., South, 

 "Ent.," xx., p. 76 (1887); Adkin, " Proc. Sth. Lond. Ent. Soc," 1892-3, p. 24 

 (1894); Fletch., "Ent.," xxxvii., pp. 143, 316 (1904).— The 1st submedian and 1st 

 basal spot of the hindwings united to form a short line parallel to the costa. 



Our type is a $ in first class condition captured at Deal, in August, 

 1887. South records it from Ventnor, 1887 ; Adkin a $ taken in 

 the Scilly Isles, June, 1891, and T. B. Fletcher a $ taken at 

 Riddlesdown, September 12th, 1894. Reverdin notes (in Hit.) a $ 

 taken at Roelbeau, near Geneva, in May, 1884. In the British 

 Museum coll. is a specimen (already alluded to antea, p. 135) from the 

 Zeller coll. taken at Messina, combining arcuata, costajuncta (one side 

 only), and double basijuncta, the penultimate basal and submedian 

 being joined as well as the last, making two distinct bows. 



