OF THE FAMILY COCCIDAE 115 



Antennae 10-segmented, filiform ; 686-758 (average 730) u. long, i.e. shorter than half body 

 length (ratio 1 : 2-20-2-54, average 2-39), shorter than posterior leg (ratio 1 : 0-72-0-74, average 

 073) and longer than penial sheath (ratio 1 : 1-92-2-09, average 2-01). Scape 49-57 (average 

 53) |x long and 40-44 (average 42) |x wide, with 3 h.s. Pedicel with distinct, polygonal, dorsal 

 reticulation ; 49-57 (average 53) u. long and 42-46 (average 43) y. wide ; with 3-8 (average 

 5-1) f.s., 5-9 (average 69) h.s. and a sensillum placodeum. Segment III : club-shaped, 2-0-2-9 

 (average 23) times longer than wide (53-63, average 59 ;x long and 21-27, average 26 (x wide) ; 

 with 8-15 (average 13) f.s. of medium length, 1 0-1-4 (average 1-2) times longer than width of 

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

 segments (in (x) 95-122 (average 113), 84-114 (average 97), 93-99 (average 95), 65-91 (average 

 75), 57-78 (average 66) and 46-57 (average 52) respectively, all of about the same width, varying 

 from 19 to 27 (x ; with 21-33 (average 30), 22-36 (average 32), 28-43 (average 36), 23-37 

 (average 27), 19-30 (average 21) and 16-23 (average iq) f.s. respectively, but no h.s. ; antennal 

 bristles on segments VIII-IX distinctly larger than the fleshy setae. Segment X : terminal 

 .', somewhat constricted ; carrying 10-15 (average 12) f.s., occasionally one h.s., 3 capitate 

 subapical setae and 5 antennal bristles of which the 3 long ones are just more than half as long as 

 the segment and the 1 shorter ones somewhat shorter and thicker than the f.s. ; with 2 sensilla 

 basiconica ventrally, one near apex and the other more proximal 



Thorax 638-688 (average 660) ;x long. 



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

 pronotal sclerites small, with 0-3 (average i-i) fleshy and 0-3 (average 0-5) hair-like lateral 

 pronotal setae on each side. Medial pronotal setae : usually one h.s. and occasionally one f.s. 

 on each side. Post-tergites comparatively large, with irregular wavy striatums ; posl-tergilal 

 setae absent. Pleural structures typical of family. Sternum with transverse ridge strong, 

 median ridge weak and only represented anteriorly, and a well sclerotized triangular sclerite. 

 Anteprosternal setae : 0-4 (average 1 -3) f.s. on each side ; prosternal setae : 13-21 (average 15) 

 f.s. and sometimes one h.s., scattered over the sternal area and spreading into the area anterior 

 to the spiracles. 



Mesothorax. Mesoprephragma with shallow emargination. Prescutum less than twice as 

 wide as long (average 115 and 201 |x respectively) ; anterior margin strongly curved ; laterally- 

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

 sclerotized medially ; polygonally reticulated. Scutum. Median membranous area subrectan- 

 gular ; 103-118 (average m) jx long and 1-50-1-78 (average 1 -6o) times as wide (width 175- 

 182, average 178 jx) ; with 14-22 (average 19) h.s., but no f.s. Scutellum 53-61 (average 58) u. 

 long and 175-182 (average 178) |x wide, ratio being 1 : 2-9-3-8 (average 3-3) ; tubular, with a 

 large ventral foramen of which the length is half or more than half that of the scutellum ; 

 without setae. Postnotum with anterior margin weakly sclerotized, irregular, and partly 

 overlapped by the metathoracic fold ; postnatal apophysis and postalare well developed, the 

 latter densely reticulated distally and without setae. Mesopostphragma with deep emargination. 

 Mesopleuron. Mesopleural ridge strong, not interrupted above coxal articulation ; pleural 



Fig. 40. Parthenolecanium pomeranicum (Kaw.), lateral view; also referable for lateral 



view of P. corni (Bouchd) . 



