( 397 ) 



spot R' — M', placed into a very large pale blue patch which is 12 to 16 mm. broad 

 at iuterual margin ami of which the oblique proximal edge is 9 mm. from base 

 of wing at SM- ; a pcstdiscal series of pale blue spots, curving costad in front, 

 the spots increasing in size behind, rounded, diameter of spot M' — M- 1 to 3 mm., 

 spots M^ — SM^ merged together with the blue area ; no admarginal dots, fringe 



white except at ends of veins. Hiudwing : a large i)ale blue area from near 



base to beyond bent of R', shaded with white proximally, becoming almost pure 

 white towards abdominal margin ; base for about 4 mm. and postdisco-margiual 

 area black, the latter 10 to 14 mm. broad at SC", 4 to 7 mm. at M^ ; a series of 

 small, submarginal spots, white, edged and shaded with blue, anterior spot the 

 largest, diameter about IJ mm. ; admarginal, pale blue, markings very thin, 

 partly obsolete. 



Underside uniformly bnfiish clay colour, black bars very thin, except bars 



M" — SM* of forewing, whitish edges of bars extremely thin. Forewing : no 



basal cell-spot, cell-bar 3 separated into two portions, sometimes into three or four 

 dots, cell-bar 4 nearer bar 3 than apex of cell, strongly convex in middle distally, 

 concave near ends ; bar D partly obsolete, very thin ; snbmedian and median 

 bars M* — SM^ heavy, joined together behind, forming a heavy half-ring, which is 

 sometimes entirely filled up with black, snbmedian bar M' — M- 3 mm. from base 

 of M^ ; median bars R^ — M" concave distally, bar R' — M' 7 mm. from base of 

 M', bar M' — M* 3 mm. more proximal, median bar R* — R^ 1 to 2 mm. from cell, 

 mostly straight, less often concave distally, bar R' — R* short, convex distally, 

 10 mm. from cell, bar SC^— R' about 2 to 2| mm. more distal, of the same 

 shape, on the outer side of median bars there are seldom vestiges of white 

 spots ; discal bars M" — SM^ represented by a black halfmoon, the other discal 

 bars indicated as blackish clouds forming an indistinct, nearly continuous, band ; 

 postdiscal bars M' — SM^ represented by a large black patch, concave distally, with 

 ill-defined, faint, grey scaling at proximal and distal sides, the other postdiscal 

 bars mostly represented by small, ill-defined, brown or black spots ; internal 



margin black near angle, bluish grey in and be3'ond middle. Hiudwing : basal 



costal bar short, sometimes absent ; no subbasal costal bar ; submedian costal 

 bar more proximal than the other submedian bars, curved or straight ; median 

 bars all more or less obviously convex distally, the series more irregular than 

 in C/i. imperiaUs, bars SC"— R' and R'— R^ more proximal than the other bars ; 

 discal and postdiscal bars represented by brown, more or less distinctly halfmoon- 

 shaped, clouds, the postdiscal ones better defined than the discal ones ; bluish white 

 submarginal dots obvious, last two contiguous with blue and black dots ; anal angle 

 less produced than in C/i. imperial/^, tails reduced to short, blunt, teeth. 



?. Like (J, wings broader. Forewing: outer margin less concave; postdiscal 

 spots more purplish blue, upper discal ones more extended white ; on the underside 

 the white discal spots at outer side of the median bars present, but small. 



Length of forewing : cj ? , 37—45 mm. 



Clasper similar to that of C/i. imperiaUs ; penis without subapical tooth, 

 armed only with a minute tooth situated about 3| mm. from the apex ; penis- 

 funnel as in imperiaUs, but the tip of the hook more acute. 



Ilab. From Angola to British East Africa ; not occurring north of ('ougo, or 

 in S. Africa. 



Ch. pijthodorus is a sexuall}' mouomorjihic southern ally of Ch. imperiaUs ; 

 in the development of the markings of the forewing above pijthodorus agrees 



