INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



139 



THE IRREGULAR WAX SCALE 



< 'eroplastes irregularis Cockerel! 



(Fig. 118) 



Description. — The mature female seale is covered with irregular, 

 somewhat globular, white wax, averaging about | inch in diameter. 



They are usually massed to- 

 gether on the twigs, as shown 

 in Fig. 118. 



Distribution. — This scale 

 appears to be limited to the 

 more arid regions bordering 

 the deserts of the southern 

 part of the State. 



Food Plants. — Various spe- 

 cies of Atriplex are the only 

 recorded food plants of this 

 seale. 



Control. — The irregular wax 

 seale is of no economic impor- 

 tance, but is included here be- 

 cause of the large numbers of 

 inquiries constantly received 

 from fruit growers concern- 

 ing it. 



Fig. lis. — The irregular wax scale, Cero- 

 plastes irregularis Ckll., on Atriplex. En- 

 la rged twice. 1 1 (riginal I 



THE TESSELLATED OR PALM SCALE 



JSucalymnatus tessellatus (Signoret) 



[En ail a mint tits perforatus (Newstead)] 



(Lecamum tessellatum Signoret) 8J 



(Fig. 119) 



Description. — The fully-matured females are quite large, flat, oval, 

 soft scales, slightly broader posteriorly and dark brown, with many 

 light yellow or greenish, short, transverse and longitudinal lines, giving 

 the surface a mosaic appearance as clearly shown in Fig. 119. 



Life History. — The young are born alive and settle upon the leaves 

 and stems of the host. Thev move about freely throughout their 



s3 Other synonyms of this species are Eucalymnatus subtessellatus (Green) and 

 E. tessellatus swainsonw (Ckll.). Davis. J. J.. iMli R.'pt. I ml. Agrcl. Kxp. Sta., p. 1:33. 



