ON THE SCALE INSECT OF MULBERRY TREES. HQ 



insect, in all three different stages, — larva, pupa and imago. 

 These differences, I think, afford sufficient grounds to justify me 

 in giving a new specific name, " patelliformis," to our scale 

 insect. 



In the following lines I will mention all the characteristics 

 of male, female, and larva of our scale insect, which differ from 

 those of Diaspis pentagonia, Targ. described by the above men- 

 tioned authors. 



I. Male. 



a. Antennae are composed of ten segments, of which the 

 terminal one is rather long and slender, and somewhat pointed 

 at the free end. 



b. Of the three segments of the thorax, the pro-thorax 

 is nearly quadrangular, the meta-thorax is short and wide, and 

 is closely jointed along its entire breadth to the first abdominal 

 segment, and is not triangular in form. 



c. The abdomen is long and conical, not elliptical. 



d. The balancer is composed of two portions, the basal 

 half club-shaped, while the distal half is reduced into the form 

 of bristles with a hook-like end. 



e. The tibia of the leg is long and cylindrical, not trian- 

 gular in form. At the insertion of a claw on the tarsus, there 

 are beset three long hairs of nearly equal length, bearing a small 

 round head at their free end. 



II. Female. 



a. The body is composed of nine segments which are 

 indicated by sutures (segment-lines) as well as by the rows of 

 secretory pores. 



b. The antennae are formed of single broad segments 

 with their free end divided into three pointed branches, and near 

 the base of the antennae there is a single long bristle. 



c. One or two rows of secretory pores lie dorsally along 

 the suture of the 5th-6th, 6th~7th, 7th-8th, and 8th-gth seg- 

 ments. 



d. The bristles on the pygidium are either simple or 

 divided, having on each free end a very lon^ fine filament. 



