AGRIADES CORIDON. 13 



syngrapha, Tutt), whilst finally, the fore- and hindwings, except the 

 cost*, are thickly covered with brilliant blue scales, in which the 

 discoidals (sometimes two, at others four) stand out plainly ( = ab. 

 tithonus, Meig. = ab. syngrapha, Kef.), and this beautiful form also shows 

 considerable modification in detail as to the character of the margin and 

 the orange lunules. Milliere and Gaschet both name blue-rayed forms 

 in which the nervures are blue and the interneural spaces dark, in our 

 experience an unusual form of variation ; these we have described later. 

 Hodgson notes (in lift.) that the white intra-marginal line of the hind- 

 wing is only exceedingly rarely replaced by blue (caerulineata), although 

 so commonly the case in A. thetis. One suspects that the striking 

 examples with asymmetrical blue streaks and patches of $ colour on 

 different wings (ab. inaequalis, Tutt) are gynandromorphic in some 

 degree ; w T e have dealt with these already (antea, pp. 8-4). It may be also 

 noted that the orange chevrons may be present or absent in all the 

 blue forms, and thus one ma} r get a combination of unicolor or sub- 

 aurantia or }>eraurantia or aurantia with any of the blue forms basi- 

 caeruleata, subradiosa, semisyngrapha, or tithonus. Blachier notes that 

 in the neighbourhood of Geneva and in Savoy, a few ? s have the 

 bases of the hindwings scaled with blue and a feeble trace of blue 

 scales at the base of the forewing, but such are rare ; the most 

 extreme example he has (taken on Mt. Saleve, September 3rd, 1885),. 

 shows the hindwings with the basal half and the anal border sprinkled 

 with blue scales ; it is a remarkable fact that, of all the specimens we- 

 have captured abroad, only one from Airolo and another from Useigne 

 have slight traces of blue scaling on the upperside of the hindwings, yet,. 

 in England, especially among the latest examples to appear, and in cer- 

 tain districts, it is one of the commonest forms of aberration. Trautmann 

 is one of the few r German lepidopterists who records blue-scaled $ s,. 

 and he notes them as not uncommon at Jena (Ent. Zeits. Guben, 

 1908, p. 162), whilst Neustadt and Kornatzki speak of it as being common 

 in Silesia (Schmett. Schles.,^. 46). Wheeler notes that, among all the 

 specimens he has taken and observed in Switzerland, only one $> ,takenat 

 Berisal, shows any blue; this has a fair amount of blue scaling at the 

 base and inner margins of all four wings. Jones also notes a £ > captured 

 July 31st, 1900, at Lago di Loppio, brown on the forewings, blue on 

 the hindwings, the underside nearly devoid of spots except a large 

 central one on each hind wing (ab. corydonis, Bergs.). In certain parts of 

 France, however, the 5 s are as frequently scaled with blue as in 

 England, e.g., Pierre t notes that, in the Forest of Chantilly, on the 

 slopes of Lamorlaye, 2 s with ashy- blue scaling occur as commonly as 

 dark $ s. Oberthiir states (Etudes, xx., p. 21) that he has seventeen 

 Spanish $ s not differing inter se, of a less dark brown tint than French 

 examples, and quite without blue scales, as also are our own Spanish 

 examples. The fringes of the ? may be whitish or greyish, chequered 

 with brown, or they may be pale brown chequered with a rather darker 

 shade ; so heavily chequered are the fringes of the forewings some- 

 times, and so dark the ground colour, that they are almost unicolorous 

 (fuscofimbriata). Keverdin notes a $ from the Bois Taille (near 

 Geneva), in which the pale part of the fringes of the forewings is 

 reddish-grey, and the brow r n streaks very wide and dark, the fringes of 

 the hindwings also less pale than usual, but not so markedly different 

 from the normal as are those of the forewings. He further observes that 



