AGKIADES CORIDON. 45 



with white (more faintly inwardly). The underside of the forewings whitish, the 

 marginal marks pale, the submedian, basal and discoidal spots ill-developed, in one 

 example only two of the spots (2 and 3) of the submedian row show; the hindwings 

 fawn in tint, with the orange chevrons moderately developed and the spots better 

 developed than those of the forewings. 



These specimens are quite unlike anything else that we have seen. 

 They cannot be Ruhl's graeca, for, although he notes the ground colour 

 of this form as having a shining greenish-silver gloss, he also states 

 that the margin is blackish-grey without spots. The undersides, how- 

 ever, are similarly somewhat faintly marked. It would be interesting 

 to know more about this race. 



y. var. nivifera, Kef., " iStett- Ent. Ztg.," xii., p. 308 (1851). ? Gorydon var., 

 Girard, "Ann. Soc. Ent. Fr.," ser. 4, v., p. 114 (1865). — Var. b, nivifera — 

 Pyrenees (Keferstein). 



This is all Keferstein writes. We have noticed no specially white 

 form from the Pyrenees. The examples from Vernet, Cauterets, Luz, 

 and Gavarnie, in the British Museum coll., are practically typical. 

 Girard speaks of " a form with the spots on the underside almost effaced, 

 the ground colour uniform grey on the upper and lower wings, with 

 no fulvous lunules, and dots not circled with white ; this aberration, 

 only occurring in the <? s, has been received by M. Berce from the 

 Pyrenees, and appears to be a transition to var. albicans of Spain." 



The Rivieran races. 



Along the French and Italian Riviera, A. coridon appears to be 

 double-brooded. It occurs in some spots in mid-April, apparently 

 continuously for several weeks. It is reported as occurring again 

 later in the year, and Chapman practically proved this point by obtain- 

 ing eggs at Ste. Maxime, which produced larvae in a short time, that 

 fed up to maturity during the summer, whilst, in almost all other parts 

 of its range, the eggs laid do not hatch till the following spring, and 

 the insect is single -brooded. We first met with this early Rivieran 

 brood in April, 1903, near Hyeres, then again in April, 1905, near 

 Hyeres, and at Draguignan and Nimes during the first week of May, 

 1905, but only in few specimens. In April and May, 1904 and 1906, 

 Chapman found it in some numbers at Ste. Maxime. The examples 

 that we captured stood in our collection as meridional! s, but were un- 

 described. In 1904, Bartel described a form from the Italian Riviera 

 as rezniceki, but his description, although agreeing in some particulars 

 with the specimens in our possession, suggested marked differences 

 which a careful examination of Chapman's material intensified, whilst 

 his comparisons with other forms (for almost all of which he 

 apparently used erroneous names), left one with no clear idea as to 

 what he was describing. Whilst we were recently at work on the 

 subject, we received from Reverdin the MS. of a description of a form 

 that he called comtanti. The three iorms thus known to us appeared 

 to present several broad characters in common, and to differ merely in 

 detail, although these details might be considered important. We 

 were unable to refer the specimens in the long series of meridionalh in 

 our collection en bloc to either rezniceki or constanti, indeed, our 

 examples appeared to cover the different ground claimed by each, and 

 to exhibit considerable and marked variation inter se. We are, at 

 present, very dissatisfied with our knowledge of the specialisation and 

 localisation of these forms, and suspect that, when the same collector 



