JAPANESE SPECIES OF PEBNICIOUS SCALE. 



169 



short processes. The dorsal surface of the pygidium is usually provided 

 with scattered oval secretory pores. 



The eggs are long oval, light greenish yellow in color, their longer 

 and shorter axes are respectively 0.156 mm. and 0.096 mm. 



Male Scales. — They are long oval and depressed, and thus they are 

 easily separated from the roundish scales of other sex. The length and 

 breadth of largest specimens are respectively 1.22 mm. and 0.75 mm. 

 The scales are variable in color, but they are mostly pale bluish or 

 whitish grey. The pellicle which lies usually excentric either close to or 

 near an end of the scale, is greyish or greyish yellow and encloses a 

 blackish or dark greyish brown central spot. The periphery of the 

 pellicle is sometimes sorrounded with a blackish ring (Fig. 5. Tab. IV.) 



Male Insects. — They are somewhat stout and orange yellow in color. 

 The head is nearly triangular and bluntly pointed at the front end. The 

 eyes simple, blackish and four in number, of which two lie dorsally near 

 the lateral sides of the head far apart from each other, while the remain- 

 ing two lie very close to each other at the middle of the ventral side of 

 head. The antennae are long and composed of eight segments and 

 covered with long fine hairs. The two basal segments are short and 

 stout, while the remaining six are longer and nearly of an equal length. 

 The thorax is more stout and broad than the other regions of the body. 

 Its breadth is nearly twice the head. Dorsally, the thorax is marked 

 with two reddish orange transverse bands, of which the anterior is shorter 

 than the posterior, and its ends bend down posteriorly at a short distance. 

 Wings are transparent and iridescent. Its inner or proximal portion is 

 narrow, while the outer or distal portion is broad and rounded. A single 

 nervure arising at the proximal margin of the wing, divides after running 

 a short distance, into two branches, of which one runs along the anterior 

 and the other along the posterior margin of it. When at rest, the two 

 wings overlap one upon the other, horizontally over the body. The 

 balancer is composed of two parts-proximal and distal. The former is 

 somewhat stout while the latter with a suddenly curved end. Legs are 

 of moderate sizes and covered with a few hairs. A tarsus is provided 



