U64 BRITISH BUTTERFLIES. 



strongly edged with white ; on the hindwings the spots similarly well- 

 developed, also 8 in number, the white margins touching each other 

 (as in the forewings) except the two costal spots; the hindwinghas also 

 a costal spot towards the base. 



j8. ab. byze, Bergstr., " Nom.," ii., p. 79, pi. xlviii., figs, 7-8 (1779).- P.P.E. 

 alis rotundatis integerrimis fuscis fimbria alba ; subtus cinerascentibus, fascia 

 ocellorum solitaria. Wings, uniform brown above, beneath bluish-asli, and with a 

 single arcuate row of ocellated spots. The preceding insect (byzas) is possibly the 

 c? of byze (Bergstrasser). 



The chief characters of this form are the blue tinge at the base of 

 the upperside of the wings, and the large ocellated spots on the under- 

 side. Bergstrasser's figure of byze represents the $ form of semi- 

 argus, fuscous in colour, with darker nervures, and tinged with blue at 

 the bases of the wings on the upperside ; the underside grey, the 

 ocellated spots very large. The figure shows the outer margin of the 

 hindwings over-hollowed, making it somewhat concave; the underside 

 grey tinged with bluish at base of hindwings, the transverse row of 

 ocellated spots strongly developed in both wings, and consisting of 

 seven large white-margined spots in forewing, and eight in hindwing, 

 almost, or quite touching one another; the discoidal lunules similarly 

 large and white-ringed (no extra spot towards the base of hindwings on 

 costa as in the figure of byzas). 



y. ab. argopoeus, Bergstr., " Nom.," iii., p. 8, pi. lii , figs. 7-8 (1779). — P.P.R. 

 alis angulatis integerrimis cceruleis fimbria alba, subtus cinereis fuscescentibus, 

 ordine ocellorum arcuato unicoinqueposticarum disco macula ocellari lunata. With 

 angled unicolorous blue wings and white fringes ; beneath, bluish-grey, with a 

 single arcuated row of small ocellated spots ; in the centre of the hindwing, a 

 discoidal lunular ocellated spot. Perhaps nothing more than an aberration of the 

 "Astragalus" butterfly, which we shall later describe. Beneath, in the centre of 

 the hindwings, is a lunular black white-margined spot as in the Vienna damoetas. 

 With byzas (Nom., pi. xlviii., figs. 5-6), it is, when the two insects are carefully 

 examined and compared side by side, not easily to be confounded (Bergstrasser). 



The particular features of this insect are the absence of the discoidal 

 lunule on the upperside of forewing, and the reduction of the ocellated 

 spots in the submedian row of the underside of forewings to five. The 

 upperside of the fig. 7 is of a somewhat uniform purplish-blue without 

 discoidal spots, but with a fairly wide black marginal border to all the 

 wings, dark nervures, and chequered fringes (though Bergstrasser's 

 description particularly notes them as " white"). The underside grey, 

 the bases of the hindwings blue only as far as the inmost spot, and 

 narrowly along the inner margin ; the discoidal spots of fore- and 

 hindwings white-edged ; the transverse row of white-margined spots 

 on the forewings, five in number, on the hindwings eight, with one 

 more on costa above the discoidal, and another much nearer the base. 



8. ab. argopoei, Bergstr., " Nom.," iii., p. 19, ]J. lxi., figs. 5-C (1779). 

 Paucipuncta, Gill., "Int. Ent. Zeits.," ii., p. 313 (1909).— ?. The 

 ? of argopocus, which is figured in pi. Iii., figs. 7-8 ; both insects being here 

 figured for the first time. It is separated from its congeners by the dark brown 

 colour of the upperside, whilst beneath, on the forewings, there is one small 

 ocellated spot more than in the <$ , and the spots have in the whole line a different 

 situation ; on the other hand the c? has on the underside of the hindwings some 

 additional ocellated spots (Bergstnisser>. 



This is a fuscous 2 without any marks whatever on the upperside 

 except the darker nervures; no discoidal lunule. The chief character 

 rests in the underside, the number of spots in the submedian row 

 on the forewings being reduced to five, and on the hindwing six, 

 the twin-spot being absent on each wing. The hindwing has, in 



