282 SOUTH-AFRICAX BUTTERFLIES, 



species — five being near allies of the former and two of the latter — 

 which have since been described are all confined to the Ethiopian 

 Region. Of these, one, E. JDrucei (Butl.)/ belonging to the Duhia 

 section, inhabits Madagascar; three, viz., Duhia, Dinarcha, Hewits., 

 and Anthedon, belong to Tropical Western Africa north of the Equator ; 

 Damoclina, mihi, is found in Angola ; Usamhara, Ward, an ally of 

 Anthedon, was discovered in Eastern Africa a few degrees south of the 

 Equator ; and Mima, Trim., Wahlhergi, Wallengr., and Deceptor, Trim., 

 seem to be limited to Natal and Zululand. All the species have a 

 peculiar fades, six of them very closely mimicking the same number of 

 the Danaine genus Amauris inhabiting their respective localities, and 

 the remainder being probably imitative (less perfectly) of some of the 

 same kinds of Amauris, or possibly of certain forms of that genus not 

 yet known. It is worthy of remark that while in Diadema close 

 mimicry of other butterflies is confined to the female, in Euralia both 

 sexes are equally well disguised. 



Although the Anthedon section, with its broad white patches, has so 

 different a superficial aspect from that of the Duhia section, in which 

 the white or yellowish spots of the fore-wing are small, all the forms 

 known are really most intimately related. The white spotting of the 

 head and thorax is identical in all ; and the fact of a male ARma 

 having been taken paired with a female Wahlhergi is a further indica- 

 tion of the close alliance existing between the sections. 



The few specimens of the two last-named species that I observed 

 in Natal were confined to the outskirts of woods, where they frequented 

 low trees ; their flight was slower and more floating than that of Diadema. 

 MisipinLs. All the three South-African forms present striking instances 

 of mimicry ; E. mima copying the Natalian variety of Amauris Echeria, 

 E. IVahlbergi most exactly simulating A. dominicanus, and the very 

 rare E, deceptor very closely resembling A. Ochlea. 



91. (1.) Euralia Wahlbergi, (Wallengren). , 

 Plate VI. fig. 2 ( (J ). 



^Diadema Wahlherrjii, Wallgrn., K. Sv.-Ak. Handl., 1857, — Lep. Rhop. 



Caffr., p. 27, n. i. 

 $ Diadema Avthedo7i, Trim, [part], Rhop. Afr. Aust., i. p. 152, n. 91 



(1862); Trans. Linn. Soc, xxvi. pp. 511-512 (note) (1869); and 



Trans. Ent. Soc, 1873, p. 106, 107 (note) \_$ , $ ]. 

 Euralia Anthedoyi, Doubl., Var. marginalis, But]., Ann. and Mag. Nat. Hist., 



1875. P- 395- 



Exp. al., 3 in. 4 lin. — 4 in. i lin. 



^ Black, with large 2^(ilches of iridescent white. Forc-wiyig : an 

 elongate, more or less distinct, longitudinal-oblique white streak in 



^ Mr. Butler [Trans. Ent. Soc. Loncl, 1874, p. 426) gives this form — which appears to be 

 the Diadema ditbia described by Boisduval in Faune Ent. de Madag,, p. 40 — as a Panopea ; 

 but there can be no doubt that it is really referable to Euralia. 



