I )l 111 E I- AMI1.Y COCCIDAE 



65 



(average 80) respectively, all of about the same width, varying from 19 to 25 (x ; with 27-38 

 (average 33), 26-32 (average 28), 26-36 (average 30), 21-33 (average 27), 18-26 (average 22) 

 and 11-21 (average 17) f.s., and 1-4 (average 2-3), 1-4 (average 2-2), 1-3 (average 2-3), 1-3 

 (average 2-1), 0-2 (average 06) and 0-2 (average 1) h.s. respectively ; antenna! bristles on 

 segments VIII-IX distinctly larger than fleshy setae. Segment X : terminal part not con- 

 stricted ; 76-84 (average 80) jx long and 22-26 (average 24) (x wide ; carrying 6-12 (average 10) 

 f.s., 3 capitate subapical setae and 5 antennal bristles of which the 3 long ones are about half as 

 long as the segment and the 2 shorter ones somewhat shorter than most fleshy setae, but 

 distinctly thicker ; with 1 scnsilla basiconica ventrally, one near apex and the other more 

 proximal. 



Thorax 584-664 (average 619) ;x long. 



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

 pronotal sclerites small, without seate. Medial pronotal setae absent ; 3-7 (average 61) circular 

 pores present on each side posterior to pronotal sclerite. Post-tergites small, without striations, 

 and without setae. Pleural structures typical of family. Sternum with a strong transverse 

 ridge, a narrow but uninterrupted median ridge and a triangular sclerite. Anteprosternal setae 

 absent ; prosternal setae : occasionally one h s 



Mesolhorax. Mesoprephragma with shallow emargination. Prescutiini about twice as wide as 

 long (average 201 and 98 u. respectively) ; anterior margin strongly curved ; laterally bounded 

 by the prescntal ridges and posteriorly by the prescutal suture ; weakly, irregularly reticidated ; 

 slightly more heavily sclerotized medially. Scutum. Median membranous area subrectangular; 

 108-128 (average 116) u. long and 1-28-1-78 (average 1-49) time as wide (width 152-192 average 

 I 73 V-) '• with 7-13 (average 10) h.s. Scutellum 61-87 (average 72) |x long and 160 192 (average 

 175) u. wide, the ratio being 1 : 2-2-2-8 (average 24) ; tubular, with ventral foramen of medium 

 size ; without setae. Postnotum with anterior margin usually regular and exposed ; postnotal 

 apophysis and postalare well developed, the latter densely reticulated distally. Mesopost- 

 phragma with shallow emargination. Mesopleuron. Mesopleural ridge strong, but interrupted 

 above coxal articulation ; pleural apophysis and pleural wing process well developed, the latter 

 connected with episternum by a narrow basalare. Subalare small. Episternum showing weak, 

 irregular reticulation ; subepisternal ridge well developed, but below membranous cleft indistinct 

 and only marked by a band of dark sclerotization. Epimeron small. Lateropleurite bounded 

 anteriorly by an extension from marginal ridge. Basisternum large, about 253 [x wide and 

 207 jx long, i.e. 1-60-1-89 (average 1-74) times longer than membranous area of scutum ; with 

 strong mediun ridge and bounded by strong marginal and precoxal ridges ; without setae. 

 Furca well developed. Mesothoracic spiracle with well developed pcritreme ; postmesospiracular 

 setae absent. Tegula small, membranous bulge with a small weak sclerite posteriorly and 

 4-7 (average 5) h.s. Third axillary wing sclerite with a pronounced ventral projection at its 

 base. Additional sclerite small, but well defined. Antemetaspiracular setae absent. 



Metathorax. Metanotum with anterior margin usually strong medially ; suspensorial 

 sclerites small, spotdike ; a small, additional sclerite usually present anterior to postnotum. 

 Postnotum consisting of a transverse sclerite on each side. Metatergal setae : one h.s. on each 

 side, 3-1 1 (average 6-3) circular pores occurring near each seta. Pleural ridge well developed, 



Fig. 17. Ctenochiton sp., lateral view. 



