302 Professor EK. B. Poulton on Mimetic Forms of 
Julvescens, each of the three mimicking a different Acreeine 
species or form. 
(a) The most primitive sub-form is typical semifulvescens 
as it occurs on Kilimanjaro,—represented in Plate XXI, 
Fig. 3a. The whole of the fore-wings, within the zigzag line 
of the four spots, is bright fulvous, while the discal patch of 
the hind-wings is pale yellowish. Thus is produced a con- 
siderable superficial resemblance to Planema quadricolor,* 
Rogenh., from the same mountain (Fig. 3). The zigzag 
line of pale spots bordering the fulvous area of the fore- 
wings represents the black margined fulvous band which 
borders the deep rich brown of the Planema. ‘The relative 
position of darker and lighter shades is the same, although 
the inner half of the surface is much brighter in the mimic 
than in the model. In the hind-wing the semifulvescens 
form has a far larger pale area than the Planema, in which 
the rich brown black-spotted triangular basal patch of the 
under-side is reproduced upon the upper. The discal 
band of the Planema, if smaller than the squarish patch 
of the mimic, is brighter in tint, being white instead of 
pale yellow. In one specimen of semifulvescens from Kili- 
manjaro the black ground colour has greatly encroached 
upon the basal margin of the discal patch, leaving a pale 
band which closely approximates to the form of the 
marking in the Planema. 
(8) The second sub-form of semifulvescens (Plate XXII, 
Fig. 2a) is a splendid member of the group of mimics 
clustered round Planema poggei (Fig. 2) as the central 
model,—the combination of which so many members 
have been described and figured by Mr. 8. A. Neave 
(Trans. Ent. Soc. 1906, p. 218: Plate X). It differs from 
Oberthiir’s form (a) in the restriction of the fulvous area 
of the fore-wing to the neighbourhood of the zigzag line 
of pale spots (compare Plate XXII, Fig. 2a, with XXT, 
Fig. 3a). On the distal side of each spot as in semi- 
Julvescens the ground colour of the wing is black ; but it 
is also very dark brown, almost black, on the proximal side 
of the innermost spot, except along the costa, where the 
fulvous tint extends nearly to the base of the wing. The 
discal patch of the hind-wing is moreover white instead of 
* This Planema, of which a male and a female were presented by 
Rey. K. St. Aubyn Rogers, was new to the Hope Collection, and is 
unrepresented in the National Collection. It was kindly named | 
for me from a photograph by Prof. Chr. Aurivillius. 
