22,4 Kuwana: The Chinese White-wax Scale 397 



6 is the longest, 3 next to the longest, 4 and 5 subequal, and joint 

 1 the shortest. The measurements are as follows: 



The three pairs of legs are similar; the tibiae slightly longer 

 than the tarsi ; claws large and simple, with the digitules large 

 and knobbed. The measurements of the different parts of the 

 hind leg are: Coxa, 41 p.; trochanter and femur, 67 p.; tibia, 

 64 fx.) tarsus, 45 p.; claw, 24 p. 



The margin of the body bears fine spiny hairs which are 

 longer toward the abdominal end; thoracic incisions with two 

 blunt tracheal spines about 12 fi in length, and usually with three 

 or four pores between the spiracles and the margin. Anal plates 

 with a long apical hair and a few spiny ones near the base, the 

 former measuring about 270 p. The anal opening bears six 

 hairs. 



The second-stage larva, female. — The body is ovate in outline, 

 the thoracic region being the broadest and tapering gradually 

 toward both ends; dorsum more or less convex and the median 

 line raised. Thoracic incisions slight and the anal cleft deep. 

 Pale yellow with the median line yellow; eyes dark brown; the 

 region of the anal cleft pale brown ; the legs and antennse pale. 



After the insect becomes settled on the host the color becomes 

 pale yellowish green with the margins somewhat purple. Be- 

 fore the second molt takes place the body becomes much convex 

 and the marginal waxy filaments prominent, the longer ones 

 measured being about 0.2 millimeter. The body measures at 

 this time 1.2 to 1.3 millimeters. 



Antennas 6-jointed, joint 3 being the longest, and each bears 

 fine hairs (Plate 1, fig. 2, a) . The measurements are as follows : 



,^ 













I 



I 



89 















n 1 





n 







