Part VII] Beeson: Life History of Toon Borer. t 
slightly concave, lateral surface convex, the anterior area being more 
rounded than the posterior area ; Chorion very finely reticulated. 
Length 0-9 mm., breadth 0-75 mm., height (at anterior end) 0-5 mm. 
Emergence by a circular cut at the anterior end. 
3. The Larva. 
[Plate I, figs. 1-3, Plate II, figs. 1-6.] 
General Description. For the general appearance of the larva 
see Plate IV, figs 2-5 and Plate I, figs. 1-3. Its colour varies from 
pale straw through brown, pink, green to blue [see sequence of 
colour changes detailed on pp. 28, 29]. In all stages a series of black 
spots (the setiferous tubercles) is prominent in 5 longitudinal rows on 
each side of the body ; the spots of the first and third rows are larger 
than the others; the small brown spots between the third and fourth 
rows are the spiracles. 
Technical Description. Described from a long series of in¬ 
dividuals of all generations, Dehra Dun.* The first three instars are not 
readily separable except by size and slight differences in the arrange¬ 
ment of tuberclets. 
♦Notation of setiferous tubercles. T I = anterior trapezoidals ; T II=posterior 
trapezoidals ; T III=supraspiraculars ; T IV and T V=subspiraculars ; T VI—laterals : 
T V 11=marginals. 
The teriminology used is that of Dyar, 1895 and Forbes, 1910; comparison with 
that of Fraeker, 1915 may be made from the subjoined list of synonyms. 
Prothorax. 
Meso-and 
Metathorax. 
Abdomen 
Author 
Fraeker 
Author 
Fraeker 
Author Fraeker 
la 
= 
alpha 
I a 
= 
alpha 
I 
= alpha. 
lb 
= 
gamma 
lb 
= 
beta 
I c 
= 
epsilon 
II a 
= 
beta . 
II a 
= 
epsilon . 
II 
= beta. 
II b 
= 
delta 
II b 
= 
rho 
II c 
= 
rho . 
III 
= 
theta 
III 
= rho. 
IV+V 
= 
kappa group 
IV 
= 
kappa 
IV 
= kappa. 
V 
= 
eta 
V 
— eta. 
VI 
= 
pi group . 
VI 
= 
pi . 
VI 
— mu. 
VII 
= 
99 99 • 
VII 
= 
pi group . 
VII 
= pi group. 
D 152 ] 
