T. BAINBRIGGE FLETCHER 27 
Life-history. The egg is oval in outline, round in section, measuring 
about half a millimetre in length. It is, when laid, light green or bluish, be- 
coming yellower as it approaches hatching. Eggs are laid at night, each egg 
singly, several being found on each young pod, flcwer-bud or young leaf. 
They are difficult to find and escape notice unless one knows what they are 
like and is looking specially for them. Eggs hatch in three and a half to four 
days in warm weather, in five to six days in the winter in the Plains. The 
larva simply bites a hole in the egg and crawls out, leaving the empty white 
ego-shell which it does not eat. (Plate VII, figs. 1, 2.) 
Larva. The newly-hatched insect is about one millimetre long, yellow, 
the segments covered with short hairs. As it grows older the colour becomes 
green, or green with brown markings, closely resembling the colouring of the / ( 
pod it is feeding on. The segments are clothed in hairs and capitate spines, 
the latter in distinct rosettes. There are five pairs of green prolegs. (Plate | 
VII, fig. 3.) The larva, on hatching, eats into the pod. and feeds upon. 
the seeds ; or it bites into the unopened flower-bud and attacks the developing 
anthers. It never actually goes completely into the pod: but stretches in from 
outside. This caterpillar is much like that of Sphenarches caffer and is found 
abundantly with it upon the buds and pods of pigeon-pea in the cold weather. 
The larval life lasts for 16 to 21 days in warm weather, from 25 to 30 days in 
the cold weather. 
Pupa. Pupation takes place on the plant, openly. The manner of 
pupation is the same as that of Sphenarches caffer, and the pupa is similarly 
attached at two points to the silken pod by means of circinate spines forming 
two cremastral pads, one at the anal extremity and the other on the lower 
surface of the eighth abdominal segment. It is green, grey, or brown, and is, 
like the larva, cryptically coloured. The pupal period is from three to five. 
days in the hot weather, seven days in the cold weather. (Plate VII, fig. 5.) 
Emergence from the pupa is effected by the rupture of the pupal integument 
along the median line from the vertex to the end of the midventral line of the 
thorax. . 
The moth is shown in Plate VII, fig. 6; the wings are normally held 
so that only the narrow forewing is visible. It is found flying in the dusk, 
resting by day on the lower surface of a leaf or on any convenient 
surface. Mating may take place soon after emergence, and oviposition 
the next night; even in captivity without food the moths survive 
for ten days. In the insectary one moth laid a total of 94 fertile eggs, 
laying over thirty the first night, the remainder on four subsequent 
nights.” 
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