Relationship between certain West African Insects. 479 
Mr. W. A. Lamborn has sent 10 females captured on the 
following dates: 1910, March 26—two, April 5—one, 
May 24—one; 1911, Jan. 1—six. These last 6 were taken 
in one spot, and had evidently only just emerged from the 
pupa. The only specimen with the yellow patches con- 
spicuous is that taken April 5, 1910. In all the others 
they are wanting, or very slightly developed. All these 
specimens are shown on Plate X XVI, figs. 1-10. 
The relative development of the yellow marks in the 
females of the following series of bred specimens has been 
described as carefully as possible in order that comparison 
may be made with the above-mentioned captured females, 
and it will be found that this feature is, upon the whole, 
far more prominent in the former. The comparison 
suggests that artificial conditions, acting as a shock, have 
tended to cause reversion to the normal pattern of the 
species. The extent to which these yellow marks appeared, 
differed greatly in the females of the different groups, each 
of which was bred from larvae found together and therefore 
developed from the eggs of a single female. This difference 
is probably to be accounted for by differing hereditary 
tendencies towards reversion, so that, although the shock 
has probably been of the same general kind, the effects 
produced are far from uniform. 
The whole of the bred females except No. 612, arranged 
in their httle families, are represented on Plate XXVI, 
figs. 11-30. 
Modification of the under surface, probably in conse- 
quence of artificial conditions, is also represented on 
figs. 31-39 of the same Plate. Figs. 31-36 represent the 
males and 37-38 the females of a single family (No. 615, 
p. 481), while fig. 39 represents the underside of a cap- 
tured female for comparison with the two latter. It will be 
noted that the pattern of fig. 36 is extraordinarily different 
from that of the other males, although fig. 35 is slightly 
transitional towards it. Furthermore, the two females, 
especially that shown in fig. 38, have undergone somewhat 
similar modifications. It will be noticed that by far the 
greatest change, as shown in figs. 36 and 38, has been under- 
gone by the smallest individuals, namely, by those which 
have presumably been most strongly affected by the 
artificial conditions. 
The upper surface of the male shown in fig. 36 is also 
remarkable in the possession of a distinct pale submarginal 
