86 Diasi>is. 



DIASPIS, Costa. 



Species in which the female puparium is more or less circular, with the 

 exuviae (pellicles) usually placed entirely within the margin, though in some 

 examples the first pellicle may extend beyond the margin of the scale. Ventral 

 scale usually delicate, remaining attached to the plant. 



Male puparium small, oblong, opaque white, often tricarinate. 



Adult female ' peg-top ' shaped, anterior segments widest. Abdominal 

 segments distinct, the divisions marked by transverse rows of conspicuous oval 

 pores communicating with short cylindrical ducts (tubular spinnerets) ; squames 

 tapering and spine-like ; sometimes divided at the tips. There is usually a 

 prominent group of parastigmatic glands round one or both pairs of spiracles. 

 The anal aperture is usually above the level of the genital aperture. 



Adult male of normal form. Antennae with a single knobbed hair at apex. 



Only two species of Diaspis have at present been found in Ceylon : — 



A. Median lobes of pygidium, large and prominent aviygdali. 



B. „ „ small and sunk into the margin... fagrace. 



