lO 



2. ZiNCKENi Felder (PI. XIX, ga, b). 



Felder, Novara, Lep. II, /. 234, //. 35> y?^- 34 (1865) . Gerydus Zinckeni. 

 Fruhstorfer, Uebersicht der Gerydinae, Zeitschrift f. wiss. 



Insektenbiologic IX, /. 247 (19 13) „ „ 



Fruhstorfer (Seitz, Groszschm. d. Erdc), /. 819, //. \\\e 



(19 1 6) 



This species, owing to its great resemblance to the more common preceding 

 species is often confused with it. But although it is certainly nearly related 

 and springs from the same original stock, — Symethus may even have been 

 differentiated out of it, — yet, owing to the persistent difference between them, 

 I consider that it must be looked upon as a separate species. I possess 5 males 

 and 5 females, which all display the differences in question. 



All Symethus specimens of both sexes show distinctly the peculiar dark 

 stripe (a) on the underside of the primaries near the base, already mentioned 

 when describing them. In Zinckeni this is entirely absent. Moreover in the 

 female of Symethus, and usually in the male, the stripe on the upperside of 

 the secondaries referred to is always present ; this also is invariably absent in 

 the Zinckeni. For the rest the upperside of the primaries is about the same 

 in both sexes, and in this resembles the females of Symethus; the males of 

 Symethus only exhibit this appearance as an exception, and then only in a 

 somewhat incomplete form. The white upon the upperside of the primaries 

 of Zinckeni is nearly the same as that in the female Symethus ; it is, however, 

 but little attacked by the darkening process and only shows the first beginnings 

 of the sharp points in which it usually terminates in Symethus. Finally, on 

 the lower edge of the secondaries of the females of Zinckeni we sometimes 

 see very small points sticking out, the last remains of so-called tails, which 

 occur also in M. Biggsii Dist. ; of this there is nothing to be seen in Symethus. 

 Miletus Zinckeni Felder is apparently another form, which has only been 

 preserved in the higher mountains. 



3. BoisDuvALii Moore ^) (PI. XIX, \oa, b). 



Moore, Cat. Lcp. E. I. C, I., /-. 19, />/. la, fig. i (9) (1857) Miletus Boisduvalii. 

 Staudinger, Lis II, /. 92, Taf. i, fig. 2 (1889). . . „ Philippus. 



') Fruhstorfer, in Zeitschr. fur wiss. Insektenbiologie, Heft 9 — 10, Band XI, S. 268 and 

 in Seitz, Groszsch. d. Erde, p. 8 1 8, describes as a new species a form which he calls Gerydus 

 CouRVOisiERi, from W. J. To me it appears, however, from his description to be only a specimen 

 of this species in which the darkening process lias not proceeded quite so far. Moreover I do 

 not consider the particulars as to place of capture in the collection Conrvoisier to be sufficiently 

 reliable. See p. 7 note. 



