90 LECANiUM PERSIC^. 



paler, with from eight to nine transverse bands formed 

 of blackish, and more or less distinct, confluent spots ; 

 the first anterior band occupying the cephalic area and 

 the second on the thoracic area, which are broadest and 

 most conspicuous, are generally continuous, while those 

 on the abdominal area are much interrupted and rarely 

 continuous on the dorsum ; they also become less 

 distinct towards the anal extremity, where they are 

 sometimes represented by a few confluent spots. Eyes 

 brownish-black or black. Form elongate-ovate and 

 highly convex, or rarely short ovate and almost 

 hemispherical. 



Adult female at period of parturition (fig. 1 a) more 

 or less shining reddish-brown, with the blackish bands 

 of the younger individuals still traceable, and the 

 spots coalesced forming indefinite lines. After par- 

 turition the blackish markings entirely disappear, and 

 the colour changes to light reddish-brown or dark 

 castaneous, various shades between these two colours 

 being common ; and when the insects are overcrowded 

 they are more or less farinose. Form somewhat 

 resembling the younger insects, but with a narrow, 

 and usually very clearly defined, central carina, 

 having deep and more or less confluent punctures 

 on either side of the dorsum merging into wavy 

 grooves at the sides. Antennae (figs. 2, 2 a) of seven 

 joints, of which the third and fourth are longest, and 

 almost equal in length ; the articulation of these joints 

 is sometimes so faint as to be scarcely traceable, and in 

 unstained preparations the two segments appear as 

 one ; there is a deep constriction towards the upper 

 portion of the third joint, with three hairs arising from 

 it ; when the constriction is very pronounced it appears 

 as a true joint ; the central hair on the apical joint is 

 longer than any of the other hairs. Legs (fig. 3 ) 

 rather slender and slightly longer than the antennae 

 coxae much produced beneath and bearing a long 

 hair ; digitules to claw slightly dilated, with truncate 

 extremities ; those of the tarsi ordinary, short. Dermis 



