Relationship between certaan West African Insects. 489 
the tubercle had been already retracted. This happened 
repeatedly, and I then took away the ant and examined 
the structures more closely. 
‘The larva, green in colour and onisciform in shape, is 
about 7 mm. in length. The red patch, which is about 
2 mm. long and 1 mm. broad, is situated in the mid-dorsal 
line of segments 10 and 11. It is diamond-shaped and 
the anterior angle is produced forwards and constitutes 
the area on segment 10. I feel sure that with a lens I can 
see a crescentic opening, with the concavity directed back- 
wards, in the portion of the patch on segment 11. 
“ Both tubercles are on segment 12, 3 mm. behind and to 
the outer side of the patch, and 4 mm. from the mid-dorsal 
line, and their length when fully extended is, according to 
my estimate, 1 mm. The tubercle is white, and, with a 
lens, one can see a ring of tiny bristles forming a fringe 
encircling its blunt and rounded apex. When the ants 
are removed, the tubercles are only to be seen for about 
half a minute, and when they are retracted one cannot 
detect the exact spot at which they were extruded, but a 
weak tactile stimulus will cause one or other to reappear. 
“The larva subsequently entered the little seed-pod 
again and ate out the whole of the interior, voiding a large 
quantity of pale green excreta. It spent the whole of 
yesterday crawling about without taking food, and to-day 
(Jan. 8) it has become motionless and is almost concealed 
under débris piled up by the ants (P. rotundata). If this 
happens under natural conditions the covering must 
effectually conceal the pupae.” 
The following data accompany No. 581. Larva in forest 
1} miles EK. Jan, 5, 1912; pupation, Jan. 9; emergence, 
10.45 a.m., Jan. 16; flew about 11.45 a.m. Of the 6 
C. akwapimensis poultoni attending larva Jan. 5, one 
is a § major, and 3 of the minors are much larger than 
the other 2. Eight of the P. rotundata, var., attending 
the larva from Jan. 6 were also sent, together with the 
material heaped by them over the resting larva on Jan. 8; 
also the seed-pod and the pupa-case. 
27. Cupido (Oboronia) punctata, Dew. 
The associated ants were Pheidole aurwillii kasaiensis 
and P. rotundata, var., the latter in the open as well as 
.n the house. 
