422 I'liOCEEDlNGS 01>" THE TI]IHD ENTOMOLOGICAL MEETING 



egg touches the other at the sides and may be upright against the phme 

 of the leaf or a little bent on either side. It is elhpsoid in shape, some- 

 times covered over with a thin bloom which is hardly perceptible to 

 the naked eye. The eggs ultimately became deep black and as such 

 may be seen as thin, black lines on the leaves. 



When fully matured, a slit opens longitudinally and the head is 

 thrown out. Slowly the slit widens and nearly half of the nymph is- 

 out of the eggshell. After 17 to 28 minutes the nymph is completely 

 out of the eggshell. It then remains stationary for a few minutes when 

 it begins to wander about. It is then a tiny pale yellow insect which 

 wanders up and down the leaf until it settles down to feed. Its colour 

 becomes smoky yellow, then deep grey, Hght black, and ultimately 

 shiny black. 



Larva — 1st Inslar. Length 0-3G mm. including the whitish fringe ; 

 shape elliptical, colour fuscous grey with two dark spots representing 

 the eyes ; a whitish waxy fringe on the margin which consists of fine,, 

 white thin waxy threads intimately touching each other. The waxy 

 threads rise a little above the margin. Dorsum longitudinally, media-- 

 nally raised with a pair of whitish elcmgate ovoid flocculent globules 

 touching each other laterally. The two pairs of flocculent globules are 

 situated on the dorsum between the eyes and the vasiform orifice. Yasi- 

 form orifice conical, broad at base, apex pointing caudad, rounded 

 apically, apex not touching the inargin. Edge of the orifice black, 

 operculum fitting nearly the anterior, basal fiat portion of the orifice 

 which is posteriorly dark fuscous, anteriorly fuscous yellow. Lingula 

 long, cylindrical, pointed apically, dark fuscous towards the apex, not 

 touching the apex of the orifice. It Hes centrally in the space between 

 the apex of the operculum and the apex of the vasiform orifice. Two 

 long, greyish setse caudad, with a pair of smaller setse at the side on 

 the margin with another pair of long dark grey setse a little above the 

 smaller setse. The space on the dorsum between the posterior median 

 pair of flocculent globules and the base of the vasiform orifice is finely, 

 trar.sversely striated. 



Larva — 2nd Lnstar. Length 046 mm., breadth 0-26 mm. ; elongate 

 elhptical, slightly convex. The newly moulted larva is greyish-brown 

 with a dark spot on each side of a median, longitudinal ridge from the 

 cephalo-thorax to the base of the vasiform orifice dorsally ; a thin, 

 whitish, waxy fringe on the margin composed of shiny rods touching 

 each other ; abdomen dorsally, distinctly segmented, the transverse 

 carinations being especially prominent on the median longitudinal 

 dorsal ridge, the carinations not reaching the marginal fringe. The 

 first transveree carination is the longest, nearly reaching the end of the 



