African Species of the Genus Acraca. 189 



mai'gin black, and some indication of black internervular rays. 

 Black spots as follows : — One in cell above origin of 2. A double 

 spot on upper part of discocellulars. A discal row of seven, the 

 first sometimes very faint and usually further from base than 

 the remainder. The next four (in 6, 5, 4, and 3) in a straight 

 line at right angles to costa. The sixth and seventh in 2 and lb 

 lie almost in a straight line with the fifth and at right angles to 

 tlie inner margin. A small subbasal spot in lb. 



H.-w. with a slight black suffusion about base of median, and 

 a narrow black line round margin. Bhick spots as on underside, 

 but some may be only faintly indicated, whilst others may be 

 larger above than below. 



Underside a pale dull replica of the upper. F.-w. with two 

 spots at ba.se of costa. H.-w. spots as follows; — A discal row of 

 nine. The first in 7, the second in 6 nearer margin, the third 

 in 5 almost immediately below the second, the fourth close to 

 end of cell, the fifth in 3 a short distance from end of cell, the 

 sixth, seventh and eighth in 2, Ic, and lb almost in a straight 

 line at level of end of cell, the ninth in la rather nearer base. 

 A spot in 8 near precostal, a subbasal in 7, two in cell, and one 

 at bai5e of area 5 against m.d.c. A subbasal in Ic, lb, and la, 

 the middle one further from base. Some black marks about 

 base of nervures. Head black with a red tuft between eyes and 

 two on collar, thorax black with red hairs, base of abdomen 

 black with yellow lateral spots, remainder whitish. Claws 

 unequal. 



Wet season form. Differs from the dry season form in having 

 the ground-colour redder, the costa blacker, all the spots larger, 

 a trace of submarginal spots in lb and 2, well-defined black 

 internervular rays on apical area, h.-w. spots large and some- 

 times partly confluent, the hind margin with a black border 

 about 1"5 mm. wide. 



Underside like the upjjer but duller, and in h.-w. a well- 

 marked whitish marginal border divided by the black ends of 

 nervules, and bounded outwardly by a narrow black line, and 

 inwardly by black internervular curved marks. 



End of abdomen orange. 



9 . Expanse about 60 mm. Resembles wet season (^ , but in 

 some cases the underside is distinctly darker than the upper, 

 especially on the h.-w., the spots ringed with grey, the fringes 

 conspicuously white, and the black marks at inner edge of 

 marginal border may be produced into points between the 

 nervules. I have not seen melanic forms of the $ such as 

 exist in allied species. 



