54 BRITISH BUTTERFLIES. 



hindwings in their extreme forms being indicated as pale spots. 

 There is considerable variation in size, the wing-expanse varying from 

 34mm. -44mm. ; the Soria and Albarracin examples average the largest, 

 although the latter contains the smallest as well as the largest 

 example. It is a most marvellous fact that Staudinger makes arrago- 

 nensis (Cat., 2nd ed., p. 12 ; 3rd ed., p. 86) a synonym of Herrich- 

 Schaffer's little bright blue $ hispana (pi. civ., figs. 500-501), hence 

 the remarkable misuse made by collectors of the latter name. 

 Chapman gives (Ent. Rec, xiv., p. 99) some interesting notes of its 

 occurrence (under the name hispana) and that of the true var. hispana 

 (under the name corydonius), noting that the former occurred on lime- 

 stone at Cuenca, where the blue form was not seen, although they 

 occurred practically on the same ground at Albarracin, but occupied 

 different areas. Sheldon, who also fell into the same error in the use 

 of varietal names, gives (Ent. Rec, xviii., p. 118) further details of 

 its occurrence, noting the pale form in the Guadalaviar valley 

 commonly, with a specimen of the ordinary coridon type, and one of 

 the "blue" hispana form; it was, he says, also common at Losillo. 

 It is, indeed, very remarkable that an example of the Central European 

 type form occurred in this district. We had hitherto seen no typical 

 specimens from a point nearer this district than the Spanish side of 

 the Pyrenees and the Asturias mountains. The species is already 

 quite changed to the arragonensis form at Montserrat. 



y. ab. caerulescens , Tutt, "Eat. Kec," xxi., p. 300 (1909). Albicans, H.-Sch., 

 "Sys. Bearb.," i., pi. ciii., figs. 494-5 (1843); supp. p. 27 (1852); Staud., " Cat.," 

 3rd ed., p. 86 (1901); Bartel, "Ent. Zeits. Guben," xviii., p. 114(1904); Seitz, 

 " Gross. -Schmett.," i., p. 315 (1909). Corydon var. <? , H.-Sch., " Sys. Bearb.," 

 pi. lxxiii., fig. 353 (1843); Oberth., "Etudes," xx., p. 21 (1896); Sheldon, " Ent. 

 Rec," xviii., p. 118 (1906). Hispana, Tutt, "Brit. Butts.," p. 166 (1896); 

 ? Spuler, " Schmett. Eur.," 3rd ed., L, p. 66 (1902). Coerulescens, Tutt, " Proc. 

 Ent. Soc. Lond.," p. lxxx (1909). — A pair of examples received from Mr. Kefer- 

 stein only differ by their considerably larger size, by the very white blue of the 

 upperside of the 3 . The underside is remarkably pale, the ocellated spots and the 

 reddish marginal lunules very small. Spain (Herrich-Schiift'er). 



We have already explained that this is merely a form of arrago- 

 nensis, Gerh., in which the long blue hair-scales are in excess, thus to 

 a great extent covering the short brilliant metallic scales that give 

 arragonensis its peculiar colour. The Cuenca and Soria examples are 

 particularly characteristic of this form on the upperside, though the 

 undersides are rather heavily spotted ; the larger Avila and Navalparal 

 examples have the upperside margins very well-defined, but are much 

 more lightly spotted beneath, and these underside differences are 

 apparently locally constant, so that the var. arragonensis and its ab. 

 caerulescens exhibit two entirely different forms of the underside locally, 

 both forms being very lightly-spotted at Avila and Navalparal (sub- 

 ocellata) move heavily-spotted (ocellata) at Cuenca, Soria and Albarracin. 



5. var. hispana, H.-Sch., "Sys. Bearb.," i., pi. civ., figs. 500, 501 (1843); 

 ltiihl, "Pal. Gross-Schmett.," pp. 278, 763 (1891-5); Lamb.. ••Pap. Bel-..' 

 p. 239(1903); Leonh., "Ins.Borse," p. 121 (1905); Tutt, " Km. Rec," xxi., p. 300 

 (1901)); " Proc. Ent. Soc. Loud.," p. lxxx(1909). Corydonvar. b, B.-Sch., '« Sys. 

 Bearb.," supp. p. 27(1852). Polonus, Stand., "Cat.," 3rd ed., p. 86 in part 

 (1901). Corydonius, Chapman, "Ent. Bee.," xiv., pp. 86, 119, 12] (1902); 

 Bartel, " Ent. Zeits. Guben," xviii., p. 114 (1904); Sheldon. " Ent. Rec," xviii., 



pp. ( .)7, 99, 118 (1906). — & . Examples from Spain are sometimes small and 

 vividly coloured as in supp. figs. 500-501 (Herrieh-Seliaft'er). Herrich-Schafier's 

 ii^ r s. 500-501 represent a small " 3 , 30mm. in expanse; blue in colour; the 



