1920] Holland, Lepidoptem of the Congo 191 



They belong apparently to what Dr. Aurivilhus designates as his 

 "Second Group" in this great genus. While I dislike very much to 

 found a specific description upon single individuals, I nevertheless am 

 constrained to do so in this case, as the insects are so evidently distinct 

 from all other forms which have been described. 



(257) 1 1 . Diestogyna kahli, new species 



Plate XII, Figure 13, o^ 



cf . Closely allied to D. amaranta Karsch, but having the hind wing somewhat 

 narrower than in the species described by Karsch, and differing totally in the distribu- 

 tion and shade of the blue color on the upper side of the wings. In D. amaranta 

 the blue color is evenly distributed over the entire surface of the fore wing and shows 

 in certain lights a tendency to play into green. In D. kahli the blue of the wings on 

 the upper side is deep pavonine blue, or intense cobalt, confined on the anterior 

 wing to a broad patch above the lower margin near the lower angle, and not invading 

 the cell; the cell and the remainder of the wing being dark velvety brown. There is also 

 in the type no indication of the presence of the small subapical pale dots which are 

 shown in the figure given by Karsch as characterizing his species. On the under side 

 of the wings there is a resemblance in the markings to those of amaranta Karsch, and 

 mawamba Bethune-Baker, but in D. kahli the outer area of the fore wing is much 

 lighter and is sharply contrasted with the darker basal area which sends forth 

 tooth-like projections in a regular series on each nervule from the costa to vein 2. 

 The hind wing is marked very much as in amaranta, but is richer and redder in tone, 

 the basal and inner areas being laved with dark maroon. The fringes of both the fore 

 and the hind wings are narrowly pure white on the upper sides, not so conspicuous 

 on the lower side. In D. amaranta Karsch the white border of the hind wing 

 seems to be restricted to small white dots at the middle of each interspace. Expanse, 

 45 mm. 



The type, which is unique, was taken at Medje and is in The American Museum 

 of Natural History. 



I take pleasure in naming this beautiful species after my friend and 

 associate, Mr. Hugo Kahl, who has assisted me in arranging the collec- 

 tion upon which I am reporting. 



(258) 12. Diestogyna rotundata, new species 



Plate XII, Figure 14, <J^ 

 cf. This species in the matter of form is distinguished bj' the relatively great 

 expanse of the hind wings, which, in their rounded outline and breadth, suggest the 

 outlines of the females of this genus, rather than the males. The species in the outline 

 of the wings comes nearer D. tadema in this respect, but the wings are relatively much 

 broader and more fully rounded in outline than is the case even in that species. The 

 wings on the upper side are brown, shot with pale lilacine blue over most of the surface 

 of the primaries and upon the inner half of the secondaries, which have the costal 

 area very broadly pale brown, shading on the costal margin into i)ale fuscous. The 

 inner margin, as far as vein 1, is also fuscous. In the fore wings there are the usual 



