150 
CYMOTHOE. By Dr. C. Atjeiyillitjs. 
johnstoni. 
staudingeri. 
indamora. 
hewitsoni. 
aurivillii. 
caprina. 
capella. 
submarginal spots and basally bounded by a deeply angled line of the ground-colour, which is much thickened 
in cellules 5 and 6; the under surface has a sharply defined, straight median line, which separates the whitish 
basal part from the brown distal part. The $ is black above with a white median band 3 mm. in breadth, 
proximally sharply, distally somewhat irregularly defined, at the costal margin of the forewing slightly curved 
towards the base; the long, conical, dee}) black submarginal spots are proximally not or only indistinctly 
light-bordered; beneath both wings are grey with a brown median line, which is basally accompanied by a 
white band and in cellules 5 and 6 of the forewing crosses the band. Cameroons. 
C. johnstoni Btlr., of which only the J is known, nearly approaches the preceding species, but has 
an expanse of 68—70 mm. and the light median band of the upper surface is broader and distally prolonged 
into teeth at the veins. Toro. 
C. staudingeri Auriv. In the J the upperside of the wings agrees in the main with the of weyrneri\ 
but the light median band on both wings is not straight-edged distally, but widened distad in the middle and 
has consequently a different, more irregular shape; the coniform submarginal spots in cellules 3 and 4 of 
the forewing are much produced basewards and more than twice as long as the corresponding spots in cellules 
1 b, 2, 6 and 7; the thick, light, line which proximally borders the submarginal spots is hence strongly curved 
proximad in the middle. On the under surface the light basal part (at first light grey, then white) is distally 
bounded by a straight brown median line; the distal part is somewhat clouded brown-grey with a fine dentate 
submarginal line. Both wings are somewhat shorter and broader than in weymeri. Is perhaps the A of the 
following species. Cameroons. 
C. indamora Hew. is similar to the $ of hewitsoni (35 b), but has the white transverse band of the fore¬ 
wing narrower, 4 mm. in breadth, sharply defined and reaching at most to vein 2, the median band of the hind¬ 
wing also narrower and sharply defined; the submarginal spots of the hindwing are small, consisting of dots 
or dashes. Beneath the basal part of the hindwing is distally bounded by a fine, straight median line. Old 
Calabar. 
C. hewitsoni Stgr. (35 b). The $ scarcely differs from that of C. staudingeri above, but beneath is entirely 
without the median line. In the $ the fore wing has a white transverse band above, beginning at the middle 
of the costal margin, reaching at least to vein 2 and much widened in cellule 2; a light spot in the cell; the 
white median band of the hindwing is about 11 mm. in breadth; beneath the median line is absent and the 
basal part of the hindwing is distinctly emarginate; otherwise the markings are almost the same as above. 
Cameroons. 
C. aurivillii Stgr. is an East African species, and is closely related to the preceding, especially to C. 
weymeri (35 c). The $ is distinguished by having the light, nearly white median band of the upper surface 
much reduced on account of the spread of the black colour; on the forewing it reaches neither the costal nor 
the hindmargin and only covers the apex of the cell and the base of cellules 2—5; on the hindwing it forms 
a large triangular median spot between veins 2 and 7; the submarginal markings are similar to those of C. 
weymeri', the under surface is yellow grey with a nearly straight brown median line. The $ differs but little 
from that of C. weymeri, but has a somewhat broader white median band and more distinct proximal white 
bordering to the submarginal spots. German East Africa. 
Whilst the previously mentioned species of the Caenis group agree in the q having the light median area of both 
wings distally bounded by a continuous black postdiscal band, which at least in cellules 1 a and 1 b of t lie forewing is 5—6 mm 
in breadth, the $3 of the following species are distinguished by this band being entirely absent or represented only by a row 
of postdiscal spots running parallel with the submarginal line and like this sharply angled. The light ground-colour of both 
wings is consequently much more extended, usually occupying the greater part of the surface. In the of these species 
the wings have therefore the following dark markings above: a uniformly broad and almost even marginal line or band, 
a submarginal line which is sharply dentate or composed of sagittate or coniform spots and sometimes also a similar postdiscal 
line running parallel with the submarginal line (cf. consanguis 35 a). The basal part of both wings is more or less broadly 
darkened. In the $$ the marginal band, the submarginal line and the postdiscal line are much widened and confluent, so 
that only a few light spots are left between the submarginal and the postdiscal line; the basal part is also very broadly 
darkened, only a narrow white median band remaining of the light ground-colour of the q- 
C. caprina Auriv. wings above with the ground-colour light grey; the base of the forewing to vein 
2 and of the hindwing to the apex of the cell yellow-brown; distal part with broad marginal band, black sub¬ 
marginal line and complete postdiscal line, much thickened at the costal and liindmargins of the forewing; the 
hindwing in addition shortly beyond the apex of the cell with a straight, even, black-brown median line; 
the under surface with straight, prominent brown median line; distal margin of the forewing deeply emargi¬ 
nate in the middle. The $ is unknown to me. Congo region, at the Sankuru River. 
C. capella Ward (35 b). The $ is similar to that of caprina, but is larger and of a lighter, cream- 
yellow ground-colour, basal area of the forewing more grey and at the hindmargin extended to beyond the 
