380 Dadylopiince. 



PSEUDOCOCCUS LILACINUS, Ckll. 

 (Plate CLVII.) 



Pseudococcus lilacinus, Cockerell, Pr. Dav. Ac. Set., Vol. X. p. 128 (1905). 

 Dactylopiiis crotonis, Green, Tropic Agric, Vol. XXIV. p. 44 (1905)- 



„ „ „ Jourti. Econ. Biol, Vol. VI. Pt. 2, p. 35 (May, 191 1). 



Adult female {figs, i, 2, 3) broadly ovoid, strongly convex above. Colour 

 brownish red, disguised by a more or less complete covering of white mealy 

 secretion, which is more densely disposed on circular patches (ten to twelve) 

 on the thorax, and in transverse bands on the abdomen. In the early adult 

 {fig, 2) these whiter areas stand out conspicuously against the darker ground 

 colour, but in older individuals the colour may be obscured by a more general 

 covering of secretion. Margin with a complete series of thirty-six short, stout, 

 bluntly pointed waxy tassels, subequal in length, those on the anterior half 

 of the body often more or less confluent. Antenna {figs. 5, 6, 7) eight- 

 jointed ; the eighth longest, often with a median clearer area (see fig. 7) 

 suggestive of a suppressed division ; seventh usually somewhat expanded 

 apically ; fourth to seventh maybe approximately equal, or the sixth and seventh 

 may be slightly longer than the other two. Legs {fig. 8) well developed, robust ; 

 claw (see fig. 9) stout and falcate, approximately half the length of the tarsus ; 

 digitules slender, the tarsals minutely knobbed, the unguals slightly dilated at 

 extremity. Tarsus more than half the length of the tibia. Spiracles markedly 

 unequal in size, the posterior being fully twice the size of the anterior pair 

 (compare yf^j. 10, 11). The ceriferous tracts (eighteen on each side) are 

 situated on more or less prominent tubercles which become obscured under 

 compression except towards the posterior extremity (see figs. 4, 12, 13), but 

 may be observed to advantage in parasitised examples when they stand out 

 conspicuously. The anterior two tracts, on each side, are situated close 

 together, on the frons. Each ceriferous tract bears two (occasionally three) 

 stout, sharply pointed spines, all approximately of equal size, and a scattered 

 group of subtriangular trilocular pores, with a pair of longish setse near the 

 base of the tubercle (see yf^. 12). Posterior extremity {fig. 13) with rounded 

 anal lobes. Anal ring with six stout setae which are approximately half the 

 length of the stouter caudal setcC. Two pairs of longish slender sets spring 

 from the space between the anal lobes. Derm with scattered minute 

 ceriferous pores which are of the same size and structure as those on the 

 ceriferous tracts, being trilocular and subtriangular {fig. 14). Some larger 

 circular pores on the venter surrounding the genital orifice. Glandular fovete 

 well developed ; the posterior pair particularly conspicuous. Length (under 

 compression) 2 to 275 mm. ; average of thirty examples 2*33 mm. Breadth 

 175 to 2*25 mm. ; average r96 mm. 



