ACE/EIX^. i6j 



This Acrcea stands between A. Acara, Hewitson, and A. Chilo, 

 Godman {Proc. Zool. Soc. Lond., 1880, p. 184, pi. xix. figs. 4, 5), a 

 native of Abyssinia. It differs from the former in its much less develojjed 

 black markings (particularly the basal black of both wings, and the 

 subapical bar and apical border of the fore-wing), and in the apical 

 yelloiv-ochreous of the fore-wing being veri/ much fainter. In the female 

 these differences are as marked as in the male, but the former is also 

 distinguished by the remarkable transparency of the fore-wing. From 

 A, Chilo, on the contrary, A. Barberi is in both sexes distinguishable 

 by its stronger black markings (with the exception of the inner edge 

 of the fuscous hind- marginal border of the fore-wing in the male and 

 of both wings in the female, which in A. Chilo is unbroken near apex 

 of fore- wing), and in the female by the much less transjjarency of the 

 fore-wing. The under-side markings and colouring of A. Barberi agree 

 entirely with those of A. Acara, except that the former are smaller. 



I have named this butterfly after its discoverer, Mr. H. Barber, who cap- 

 tured the two males and the female here described in the Transvaal country 

 during the year 1873. Mr. Barber collected a number of species in that region, 

 but did not note localities further than stating that all were taken to the north 

 of Pretoria. 



To this species, I consider, should be referred two butterflies received at 

 the South-African Museum, viz., a male taken on the Vaal Eiver by Colonel 

 J. H. Bowker, and a female forwarded from some part of the Transvaal by Mr. 

 D. Arnot. These examples are clearly referable to one and the same variation, 

 both having the apical yellow-ochreous of fore-wing more pronounced, while 

 the interior fuscous edging of the hind-marginal border is almost obsolete. In 

 the male this last-named character extends in a less marked degree to the hind- 

 wing, while in the female the peculiar transparency is not noticeable, the 

 wings being quite as opaque as in ordinary females of A. Acara. 



Localities of Acrcea Barberi. 

 I. South Africa. 

 B. Cape Colony. 



c. Griqualand West. — Klipdrift [since Barkly], Vaal River (/. H. 

 Bo wker). — Var. 

 K. Transvaal. — ? Locality {D. Arnot). North of Pretoria {H. Barber). 



49. (16.) Acrsea Encedon (Linnaeus).^ 



Papilio Encedon, Linn., Mus. Lud. Ulr. Reg., p. 244, n. 6t, (1764). 

 Papilio Encedonia, Linn., Syst. Nat., i. 2, p. 762, n. 90 (1767). 

 Acrdza Sganzini, Boisd., App. Yoy. Deleg. dans I'Afr. Aust., p. 590 (1847). 

 Acrsea Lycia, Fab. (var. Sganzini, Boisd.), Gudr., in Lefebv. Voy. en 

 A.byss., pi. 10, ff". 4, 5 (1849). 



„ „ Doubl., Gen. Diurn. Lep., pi. 19, f. 2 (1848). 



„ „ Var. A., Trim., Rhop. Afr. Aust., i. p. 103 (1862). 



^ The satisfactory identification of this species as the rufous form of the more recent 

 A. Lycia, Fab., is due to the research of Mr. P. O. C. Aurivillius, of the Royal Museum at 

 Stockholm. See his Recensio Critica Lepidopterorum Musei Ludovicce UlriccB, &c. (in K. Sv. 

 Vet.-Akad. Uandl, 1882, p. 56). 



