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10
Journal of Science and Technology in the Tropics
2−4
Numbers in front and in parentbesia are shown frequent setal branches and range of variation respectively
into two lobes by a shallow U shaped depression with 8-15 fine setae on each
lobe. Sternum IX broad with many scales entirely and with 20-25 fine setae on
apical margin. Gonocoxite (Gc): 3.2 as long as its breadth at center, lateral and
ventral aspects with many long setae and scales; basal dorsomesal lobe (BML)
with a row of 4 or 5 graded spines, the inner apical one longest; gonostylus (Gs)
ca 0.5 as long as the gonocoxite, comb of 7 teeth in a row, apical one spinelike
larger than the other blant teeth. Phallosome (PH) round.
Pupa (Fig. 2, Table 1) - Cephalothorax (Fig. 2C): Yellow to light brown
pigmentation. Trumpet (Fig. 2B), 0.5 mm, index 3.3. Setae 1-CT single or
double, longer than others. Abdomen: Length ca 4.25 mm; segments I-VIII
with very fine spicules; seta1-I (Fig. 2D) long, fanlike with 4 main branches; 1-II
conspicuous forked with several branches; 3-II, III and 5-IV, V long, single; seta
6-VI long, usually single; 9-VII, VIII long with fine aciculate branches. Paddle:
Length ca 0.75 mm lightly pigmented except at base, with midrib from base to
apex and with marginal filamentous spicules; seta 1-P single, very fine. Genital
lobe: Extending to ca 0.57 of paddle in male, to 0.25 of paddle in female.
Fourth-instar Larva (Fig. 3, Table 2) - Head (Fig. 3A): 0.96 mm as long as the
width; light yellow-brown in colour except area around mouth and collar which
are slightly darker; dorsomentum (Fig. 3D) with a strong median tooth and with
7 or 8 teeth on each side. Seta 1-C small, single, tapering; 9-C long with usually
2 branches. Antenna: Integument smooth, yellow in colour, length about 0.26
of head; shaft about the same breadth from base to apex, seta 1-A single at 0.6
from base. Thorax (Fig. 3C): Seta 1-P long, usually single; 3-M usually long