188 BRITISH BUTTERFLIES. 



nevertheless, when examined with a lens. These three examples otherwise 

 present the characters of var. philonomus, two measuring 20mm., and the third 

 21mm. (Reverdin). 



We are indebted to Dr. Reverdin for an advance copy of his 

 description of this aberration, which is to be published and figured in 

 the Bull. Soc. Lep. Gen., 1909, pi. x., fig. 1, as he desires that it 

 should be noticed in our work. This form can only stand apart from 

 bella, H.-Sch., as an aberration of the var. philonomus, whilst bella is 

 the parallel ab. of the var. orientalis. It appears to us that Gerhard's 

 figure belongs here, rather than to the orientalis race from Asia Minor 

 (see supra). 



e. ab. duplex, Ckll., " Ent.," xxii., p. 6 (1889j. JEgon var., Bond, " Ent. Mo. 

 Mag.," it., p. 200 (1872); " Ent.," vi., p. 341 (1873;. Mgon gynand., Schultz, 

 " Illus. Zeits. fur Ent.," iii., p. 102 (1898). — 2 . A specimen having the right hind- 

 wings plain brown, those on the left hand blue ; at first sight it has the appearance of a 

 gynand romorph, but is in reality a ? , combining the two forms of that sex 

 ( Cocke rell). Taken in the New Forest (Bond). 



£. ab. fallout, n. ab. Mgon var., Mill., " Ann. Soc. Linn. Lyon," p. 436. 

 pi. lxi., fig. 7 (1865). — ? . This beautiful aberration, which is of great size, differs 

 from the type in having a bluish tint spread over the wings chiefly on the 

 secondaries, a white discal spot strikingly indicated on all four wings above and 

 below, and, on the upper- wings, white rays, the bases of which rest on the brown 

 subterminal line. The underside, the ground colour of which is less brown than 

 the type, does not differ perceptibly from the latter, except that the numerous black 

 spots are replaced by white. Lastly, the metallic green at the base of the wings is 

 absent. Taken at Montpellier, by Mr. Fallou, in July, 1857 (Milliere). 



The illustration shows a brown 2 with lilac- blue suffusion on the 

 hindwings, and brighter blue along inner margin and lower nervuresof 

 forewing, a suffused white, antemarginal, band on the hindwings, 

 containing a row of black spots, an antemarginal band of large, white, 

 wedge-shape spots pointing towards the disc on the forewings, and 

 striking white discoidal spots on all four wings. The underside is not 

 illustrated. 



7). ab. caeruleo-cuneata, Ebert, ''Soc. Ent.," xxii-, p. 169(1908).--?. Alis 

 posterioribus supra radioforme caeruleis cuneis. There are, on the upperside of 

 the hindwing, quite regular, radiating, narrow, sky-blue wedges, the bases of which 

 are set closely on to the red marginal lunules, whilst the very sharp points lose 

 themselves in the ground colour of the base of the wing. Also near the wing- 

 bases, one sees in addition a few blue scales. On each hindwing are five of 

 these radiating wedges, between which the brown ground colour is visible in very 

 narrow streaks. The general impression given by the hindwings is in consequence 

 definitely blue. Taken at Stahlberg, near Cassel, July 22nd, 1907 (Ebertj. 



8. ab. argyrotoxus, Bergstr., "Nom.," ii., p. 77, pi. xlvii., figs. 3-4(1779); 

 Staud., "Cat.," 2nd ed., p. 10 (1871).-— P.P./?. alis rotundatis integerrimis fusco 

 coeruleis, subtus utrisque fascia fulva, senisque pone eandem in postica pupillis 

 argenteis. With rounded, unicolorous. black and blue wings, a transverse orange 

 band on the underside of all the wings, and six silver pupils on the outer margin of 

 the hindwings. Probably the <J of the following [argyra), and the aegon of the 

 Vienna entomologists. It ought to be called the " Geisklee ('or Cytisus) butterfly." 

 on which plant the larva is said to feed (Bergstrasser). 



The main feature of this form is the strongly-developed series of 

 metallic spots on the underside of the hindwings. is is evidently 

 intended for the normal, strongly- margined, form of P. aegon, but its 

 wings are of too bright a blue colour, and the outer marginal border of 

 all four wings is black, the fringes white. The underside has rather 

 large spots; the transverse orange band on all wings is well-developed, 

 and the white band inside the orange equally so in the hindwings, but 



