1908.] SPECIES OF RHOPALOCERAN BUTTERFLIES. 113 



veins 1 and 2 similar to that in D. elecda Hew. Lobe slightly 

 •developed. — Under side. Both wings dirty whitish all over, without 

 any grey border to the termen. Primaries with a narrow, very 

 slightly oblique, pale yellow postmedial line tapering into a point 

 on the fold ; subterminal line obscure, very pale yellow ; a sex- 

 pencil of black hairs on the fold. Secondaries with the two 

 lines of the primaries continued through. Lobe-spot black, very 

 small, with a minute spot of metallic-blue scales above ; second 

 spot in a patch of obscure very pale yellow, with a trace of 

 whitish-blue submetallic scales at its upper edge. 



Expanse 26-32 mm. 



Hab. Makala, Congo Free State. 



In my collection and in that of Major Powell -Cotton. 



This species is a near ally of D. elecda Hew., but the blue of 

 the upper side is quite difl'erent — being blue, not green ; the under 

 side is also different and the markings readily distinguishable. 



loLAUs coTTONi, sp, n. (Plate IX. fig. 14.) 



cJ . Primaries brilliant metallic lustrous greenish blue, extending 

 over the cell and two-thirds of the radial area below vein 4 and 

 the entire lower portion of the wing. Costa broadly black, apex 

 black to the cell; termen tapering rapidly to vein 2. Secondaries 

 entirely brilliant greenish blue like the primary, with almost 

 linear black termen, apex with black very I'estricted, a large 

 black shiny sexual patch to over the cell. Fringes snow-white. — 

 Under side. Both wings white. Primaries with apex broadly grey, 

 rapidly tapering to vein 1 a, a short interrupted linear line from 

 vein 6 to 3, with the white of the wing broadly edging it out- 

 wardly. Secondaries with a linear blackish subterminal line 

 (interrupted at the veins) from the costa to the inner margin, 

 angled as usual between veins 1 and 2 ; a defined small blood-red 

 spot between veins 2 and 3 ; lobe-spot black, quite small, edged 

 externally with bronzy metallic green and above with a small 

 blood-red patch, over the lower part of which are superimposed 

 pale metallic- bhie scales ; three shortish tails, the third little 

 more than a tooth. 



Expanse 38 mm. 



Hab. Makala, Beni, Congo Free State : July. 



Type in the Powell-Cotton collection. 



lOLAUS BILITTEATA, Sp. n. 



5 . Primaries brown, with three-quarters of the fold and the 

 cell and the angle between veins 2 and 4 whitish, sufi"used more 

 or less with very pale metallic blue, the outer part having less 

 sufiusion. Secondaries brownish, with the basal two-thirds suf- 

 fused with very pale metallic blue ; a white subterminal stripe 

 bisecting the broad brown termen, a vermilion anal spot,- and 

 a black marginal spot with slight metallic-bluish scales. — Under 

 side. Both wings white. Primaries with a defined brown ex- 

 curved postmedial stripe, very slightly waved between each vein, 



Proc. Zool. Soc— 1908, No. YIII. 8 



