108 ON THE SCALE INSECT OF MULBERRY TREES. 



band on the anterior edge, the remaining portion with three lon- 

 gitudinal parallel lines. The postscutellum is small, nearly 

 triangular in form, and there lies, between the scutum and post- 

 scutellum, a broad transverse band of dark reddish orange color. 

 The meta-thorax which is the smallest of the thoracal segments, 

 is wide, and closely jointed on its entire breadth with a first 

 abdominal segment, so that it looks like one of the abdominal 

 segments. 



The fore wings, thin, membranous and transparent, are long 

 oval, narrowed at their base. They are provided with two 

 nervures — subcostal and cubital. The former is longer and 

 stronger, passing parallel with the costal margin, disappears 

 gradually towards the external margin of the wing. The 

 cubital nervure is shorter and finer than the former, arises near 

 the base of the subcostal nervure, and running obliquely ter- 

 minates about midway of the posterior margin of the wing. 



The balancer (Fig. i, f. PI. I) is composed of two parts 

 nearly equal in length, of which the distal has a form of bristle 

 with a free end slightly curved. 



The legs (Fig. i, e. PI. I) are all of a moderate size, and 

 almost similar in length and structure. The coxal joint is oval 

 and stout, the trochanter which is oblong in form, is closely 

 attached to the femur, so that these two seem to form a single 

 spindle-shaped segment. The tibia which is somewhat more 

 slender than the femur, is beset with a few short hairs. The 

 tarsus is formed of only a single long piece pointed at the free 

 end, which bears a pointed claw. The tarsus is also provided 

 with short hairs as on the tibia. At the insertion of the claw on 

 the tarsus, are three long club-shaped hairs. 



The abdomen is nearly equal in length to the thorax,, but 

 is gradually narrowed towards its free end. It is jointed with 

 the thorax by its entire breadth, and is composed of nine seg- 

 ments. The terminal segment, is provided with two long bristle- 

 like appendages lying close side by side, so as to form a single 

 long filament measuring 0,25 mm. in length. 



The length and breadth of the body are on an average 0,80 

 mm. and 0,25 mm. respectively. The expansion of wings is 

 2,0 mm. and the caudal filament is 0,25 mm. in length (Fig. 1 ; 

 1. a. PI. I). 



