394 BRITISH LEPIDOPTERA. 



ocellata [cfr., Standfuss, " Exper. Zool. Studien," Denkschrift. der allgem. 

 schweiz. Gesellsch. fur die gesammt. NaturwLsenschaften, 1898, pp. 43 — 44). 

 Ceci etant, nous sommes forces de reconnaitre que la S. atlanticus est sous certains 

 rapports physiologiques moins avancee que Ja S, ocellata. (4) M. Austaut a deja 

 souvent introduit le produit du croisement.de S. atlanticus avec S. austauti. Cette 

 S. austauti est la forme locale gigantesque du Nord de l'Afrique qui correspond 

 a la S. populi de nos regions. Notre S. hybr. fringsl se distingue dudit hybride 

 de M. Austaut par les caracteres suivants : (a) L'envergure des ailes, 78— 82mm., 

 qui reste en dessous de l'envergure de la S. hybr. metis, qui atteint 95mm. et 

 davantage encore, (b) Des ailes relativement plus larges. (e) Des couleurs plus 

 vives, des dessins plus fortement marques, ce qui n'est pas le cas chez la S. hybr. 

 metis qui conformement a la S. austauti, dont il provient, n'a que des lignes 

 ondulees assez peu distinctes. {d) Les proportions entre les individus males et 

 les individus femelles normalement developpes semblent etre a peu pies les memes 

 entre les deux formes hybrides. En effet M. Austaut a eu l'obligeance de m' 

 informer qu'il obtint, en tout, de ses magnifiques hybrides, 45 individus males 

 et 5 individus femelles (Standfuss, Bull. Soc. Ent. Fr., 1901, pp. 87 — 89). 



This is also, of course, if atlanticus be really only the north African 

 form of .5. ocellata, a variety of S. hybr. hybridus, Stephs. Standfuss, 

 however, in his description, suggests some physiological differences 

 between ocellata and atlanticus, so that we have retained the name, 

 which otherwise, perhaps, should sink as a synonym of S. hybr. 

 hybridus, Stephs. 



6. Amorpha hybr. metis, Aust. (austauti 3 X atlanticus ? ) and ab. deleta, 

 Aust. — Size of medium-sized examples of A. austauti, and general form of wings 

 nearly like that of this latter species, that is to say, rather broad and hardly dentated 

 along the outer margins. Upperside of forewings of a reddish tint, analogous to 

 that of ab. incamata, with the pattern arranged as follows: 1st, a basal area of rosy- 

 grey, traversed by a brown transverse line, sinuate, and bounded externally by 

 another transverse line, which is lighter and slightly arcuate or convex ; 2nd, a broad 

 median area of a darker grey, uniform, slightly lighter on the costa, marked with a 

 small white cellular spot, and bordered by two nanow parallel bands, the one grey, 

 the other brown, not much sinuated, and very slightly undulated ; and 3rd, another 

 terminal area, rather narrow, of a rosy-grey, marked towards the middle of the 

 outer margin by a "semilunar" brown spot. The outer angle is marked 

 with a blackish spot. Finally, a dark brown line, almost straight, traverses the 

 middle of the wing a little beyond the cellular white spot. The upperside of the 

 hindwings is of a rather bright amaranth-red, darker at the base than towards the 

 opposite extremity. Anal region of the wing covered by a very large 

 fuliginous black ocellated spot, subtriangular, with outline not much inter- 

 rupted, and of which the centre is occupied by a whitish pupil. Anterior 

 margin of the wing of a sombre grey, showing the following transverse markings : 

 1st, a dark grey band margined on each side by a pale grey border ; 2nd, a line 

 of an obscure dark red descending obliquely from the anterior margin to the 

 abdominal margin, after having, by a flexuous movement, gone round the summit 

 of the large ocellated black spot. Body relatively long, of a rosy-grey, with 

 the abdominal incisions paler; a longitudinal spot of a very pale brown, and 

 very straight, on the middle of the thorax. Antenna; whitish as in those of most 

 Amorphics. Palpi tawny on the edges, adorned with some brown hairs. Tibia- 

 of the first two pairs of legs pale brown. All these characters, except as below- 

 noted, are invariable in the 6 examples, all <$ s, which I have before me. But the 

 general tint is not reddish in 3 of them, but cinereous-grey analogous to that 

 of typical A. austauti. In these latter, also, the amaranth-coloured spot which 

 covers the lower part of the secondaries has become replaced by a pale brown, 

 while that which normally occupies the disc of the reverse side of the superiors 

 is completely wanting. This modification is so decided that I consider it an 

 aberrant form, deserving a separate name. I call it deleta. Its aspect is nearer 

 that of austauti, while the reddish type, especially on account of the amaranth- 

 coloured wash of the secondaries, more resembles atlanticus. From more than 

 150 eggs, almost all fertile, only 32 larvae were obtained, of which only 6 reached 

 pupation. The larva is intermediate between those of the parents (Austaut, Le 

 Nat.\ xiv., p. 230). 



Austaut writes (in titt., April 4th, 1902) : " I have only obtained 



