1891.] FROM SOUTH-WESTERN AFRICA. 85 



similar very conspicuous hind-marginal black spot between 1st and 

 2nd median nervules bounded internally by a wide pale-yellow 

 lunule ; costa rather prominently convex at a little distance from the 

 base. 



Omrora (November). One male example. 



This species belongs to the group separated generically by Moore 

 (Lep, Ceylon, i. p. 104, 1881) as Virachola, and in its blue upper- 

 side colouring resembles the much larger D. perse, Hewits., which 

 is given as the typical species. In the strong convexity or lobation 

 of the wing-margins where they overlap near the bases, D. obscurata 

 resembles Hypolyccena cceculm (Hopff.), while in the very conspi- 

 cuous black patch or cloud on theupperside of the fore wings it bears 

 some likeness to H. erylus (Godt.). 



Genus Hypolyc^na, Feld. 



62. Hypolyc^na c^culus (Hopff.). (Plate IX. fig. 14 d".) 



lolaus cceculus, Hopff. Monatsb. k. Akad. Wissensch. Berl. 1855, 

 p. 642. n. 17 ; and Peters, Reise Mossamb., Ins. p. 402, t. xxv. 

 fF. 12-14 ((^ ?). 



Omrora (August). Eight examples ; six males and two females. 



The examples under notice are rather larger (exp. al. S 1 in. 

 3-5| lin., 5 1 in. 4|-5| lin.) than the types from Qnerimba and 

 Tette described and figured by Hopffer, and also than the specimens 

 I have received from Delagoa Bay. The males further differ on the 

 upperside in presenting a decidedly more violaceous tint than the 

 East-African males, and a narrower fuscous apical hind-marginal 

 border in the fore wings ; while both sexes on the underside have the 

 thin transverse streaks of a much more decided red. 



Besides the above-mentioned examples the collection contains six 

 males (four from Humbe taken in October, and two from Omrora 

 taken in November) which appear to constitute a very strongly 

 marked seasonal form of H. cceculus, presenting the following dis- 

 tinctions from the earlier brood : — Size larger (exp. al. 1 in. 5-6 lin.) ; 

 upperside of a deeper violaceous not inclining to blue, with the 

 fuscous border of fore wings broader ; underside with the red trans- 

 verse streaks greatly {from more than twice to three times) broader. 

 The underside markings correspond so exactly in position and form 

 with those of ordinary ccecitlus that, notwithstanding their extreme 

 development, it is impossible to regard them as indicating a distinct 

 species. 



Genus Iolaus, Hiibn. 



63. Iolaus bov^^keri. Trim. 



5 . Iolaus bowkeri, Trim. Tians. Ent. Soc. Lond. 3rd ser. ii. 

 p. 176 (1864); Rhop. Afr. Aust. ii. p. 225. n. 130, pi. 4. f. 4 

 (1866); and (d $) S.-Afr. Butt. ii. p. 132. n. 186 (1887). 



Ehanda (September), Omrora (November), Okavango River 

 (December), and Omaramba-Oamatako (January). Five examples ; 

 three males, tvpo females. 



