76 LIFE-HISTORIES OF GELECHIADA 
“ Tarva. The full-grown larva is 7 to 14 mm. long. The head shield 
is 0°80 to 0°86 mm. broad and fuscous brown. The cervical shield is darker 
brownish-fuscous, with a pale mid-dorsal line, shining, the posterior margin 
medially straight. The anal shield is brown. The mesothorax and metatho- 
rax are deep maroon. The body varies in colour through green and grey and 
is overlaid dorsally with purplish as the larva nears pupation. It is slender, 
tapering from the mesothorax posteriorly and set closely and uniformly with 
minute granules each bearing a minute point, the granules of the thorax and the 
last abdominal segment being the larger. The tubercles and their sete are 
inconspicuous, brownish ; tubercle IT is slightly larger than I. The legs are 
deep fuscous ; the prolegs, green.....The larva on potato is more greyish on 
the body...and has the mesothorax and metathorax pinkish instead of deep 
maroon. 
“ Pupa. The pupa is yellowish-brown, 5°5 to 7 mm. long and 1°5 to 2 
mm. broad; it is broadest through the metathorax, tapering both anteriorly 
and posteriorly. The head is rather distinct and slightly nodding. The 
abdomen, excepting the last three segments, is set with very mmute spinules ; 
it bears at the tip mid-dorsally a short, curved, erect, pointed horn flanked by 
about four pairs of long hooked spinules, and ventrally a pair of blunt, rounded 
lobes beneath which are about four pairs of long hooked spinules. Each 
abdominal segment is set with a transverse row of spinules near the anterior 
margin.” 
A good deal of work has been done in India to combat the attack of this 
pest on stored potato tubers, and accounts will be found in the Agricultural 
Journal of India and in the Bihar Agricultural Journal. Storage under sand 
has been found successful in some districts, and in others fumigation with 
petrol vapour and subsequent storage in moth-proof godowns is used. 
PHTHORIMHA ERGASIMA, MEYR. (PLATE XVII, FIG. 2.) 
Phthorimea ergasima, Meyr., Exot. Micr., I, 568-569 eee ); 1. ¢. 
(1918)(2) ; Proc. Second Entl. Meeting, p. 288_(1917)(3), ‘Yarns, ,? Red BM 
Described from Pusa(}). hate T. Dial Seis 
“Larva green, head and plate of 2 purplish ; mines a blotch in leaves of 
Solanum melongena (Fletcher)’’(?). 
At Pusa the larve mine brinjal leaves in January to March and in July 
and perhaps throughout the year, eating the tissues between the epidermal 
layers. The larva is able to emerge from its mine and walk about and enter 
a leaf again at another place. The mine is usually near the tip of a leaf. The 
larva is about 7 mm. long and about 1:25 mm. broad across the metathorax 
