OF THE FAMILY COCCIDAE 



109 



with 10-15 (average 13) f.s. of medium length, 1 -1-1-4 (average 1-2) times longer than width of 

 segment ; with 1-4 usual sensilla basiconica. Segments IV-IX cylindrical ; lengths of these 

 segments (in u.) 171-220 (average 192), 103-141 (average 114), 99-113 (average 107), 80-103 

 (average 90), 65-84 (average 73) and 53-68 (average 59) respectively, all of about the same 

 width, varying from 21 to 29 (x ; with 38-67 (average 53), 31-46 (average 36), 32-54 (average 

 36), 27-38 (average 32), 22-30 (average 25) and 17-25 (average 20) f.s., but no h.s. ; antennal 

 bristles on segments VIII-IX distinctly larger than f.s. Segment X : terminal J somewhat 

 constricted ; carrying 7-13 (average 9-4) f.s., 3 capitate subapical setae and 5 antennal bristles 

 of which the 3 long ones are about § as long as the segment and the 2 shorter ones somewhat 

 shorter and thicker than the f.s. ; with 2 sensilla basiconica ventrally, one near apex and the 

 other more proximal 



Thorax 669-790 (average 733) \x long. 



Prothorax. Pronotal ridge strong, but medially interrupted by weak sclerotization. Lateral 

 pronotal sclerites small, occasionally with one fleshy lateral pronotal seta on each side. Medial 

 pronotal setae absent. Post-tergiles comparatively large, with irregular, wavy striatums ; post- 

 tergital setae absent. Pleural structures typical of the family. Sternum with strong transverse 

 ridge, interrupted median ridge and small triangular sclerite. Anteprosternal setae : 1-3 

 (average 2-1) f.s. on each side ; prostemal setae 19-30 (average 26) f.s., scattered over the sternal 

 area and spreading into the area anterior to the spiracles. 



Mesothorax. Mesoprepliragma with shallow emargination. Prescutum less than twice as wide 

 as long (average 223 and 127 p. respectively) ; anterior margin strongly curved ; laterally 

 bounded by the prescutal ridges and posteriorly by the prescutal suture ; slightly more heavily 



Fig. 38. Parthenolecanium corni (Bouche), dorsal and ventral view. 



