Egg stages Colour Shape Diameter
Egg stage-I Opaque, greenish Round or oval 0.45mm
Egg stage – II Translucent, light green Oval with a narrow peri-vitelline space at one end and small transparent plate (the blastoderm) were easily distinguished 0.57mm
Egg stage-III Translucent, brownish-yellow The embryo further developed with anterior transparent plate and differentiated into cephalic lobe 0.58mm
Egg stage – IV Transparent, dull whitish in colour Developed with conspicuous black eye spots at the anterior and rudiments of cephalothoracic appendages were developed, the posterior region was coiled 0.65mm
Table 1: Characteristic features of different egg stages.