OF THIi FAMILY COCCIDAE 



75 



Head subconica! in dorsal view ; in lateral view obliquely elongated dorsoventrally, with, 

 anterodorsal bulge somewhat pronounced ; length from apex to pronotal ridge 205-247 (average 

 222) \i, width across genae 243-266 (average 253) li. Median crest sclerotized and distinctly 

 polygonally reticulated ; with 9-12 (average 10) hair-like dorsal head setae, arranged in a group 

 of 3-5 near anterior margin of head and a group of 5—7 very short setae more posteriorly. 

 M idcranial ridge dorsally absent ; ventrally narrow but well defined, reaching ocular sclerite 

 posteriorly, surrounding area with polygonal reticulation. Genae large, sclerotized, polygonally 

 reticulated, without setae. Eyes : two pairs ; subequal ; corneae of dorsal eyes 19-27 

 (average 25) y. in diameter and 3-4-4-2 (average 3-9) times as much apart ; those of the ventral 

 eyes 19-27 (average 26) \l in diameter and 1-2-1-6 (average 1-3) times as much apart. Ocellus 

 small, bulging. Ocular sclerite well sclerotized and polygonally reticulated throughout. Pre- 

 ocular ridge short, not extending far below articular process. Postocular ridge well developed 

 dorsally and lateroventrally, but weak posteromedially ; below ocellus the ridge splits up, 

 with anterior branch partly surrounding ocellus. Interocular ridge absent, but sometimes 

 indicated by a line of dark sclerotization. I tarsal ocular setae absent; ventral head setae : 

 4-6 (average 5) h.s., situated on the anterior margin or just anterior to the ocular sclerite ; 

 with one pair of setae distinctly longer than others. Preoral ridge present. Tendon-like 

 apodeme long. Cranial apophysis of medium length ; apex bifurcate with a central lobe, not 

 reaching level of anterior margin of ventral eyes. Mouth opening irregular Anterior tentorial 

 pits apparently present anterolateral to mouth opening. 



Antennae 10-segmented, filiform ; 671-809 (average 770) pi long, i.e. shorter than half body 

 length (ratio 1 : 2-13-2-45, average 2-28), longer than posterior le^ (ratio 1 : 0-95-0-96) and 

 longer than penial sheath (ratio 1 : 1-55-1-73, average 1-62). Scape 45 53 (average 47) la long 

 and 46-49 (average 47) (x wide, with 3-4 (average 3-4) h.s. Pedicel with we.ik. polygonal, 

 dorsal reticulation ; 55-68 (average 63) \i long and 32 42 (average 38) u, wide, with 0-3 

 (average 1-2) f.s., 4-9 (average 6-8) h.s. and a sensilluni rjlacodeum. Segment III < tub-shaped, 

 2 '7-3 '7 (average 3-1) times longer than wide (68-86, average 78 ■>- long and 23 jo, average 

 26 (x wide) ; with 4—7 (average 6) f.s. of medium length, 1-1-1-3 (average 12) times as long as 

 width of segment ; with i— 3 usual sensill.i basiconica Segments IV [X cylindrical ; lengths oi 

 these segments (in p.) 106-133 (average 121), 76-133 (average 95), 72 91 (average 84), 70-95 

 (average 83), 61-76 (average 67) and 53—72 (average 66) respectively, widths varying from 

 21 to 27 (x, with distal segments wider than proximal ones ; with 18-27 (average 21), [3 24 

 (average 16), 13-23 (average 17), 12-18 (average 16), 12 19 (average 15) and 10 17 (average 15) 

 f.s. respectively, but no h.s. ; antenual bristles on segments VIII l\ not distinctly different 

 from f.s., sometimes slightly thicker. Segment X : terminal part not constricted ; 57-72 

 (average 65) \x long and 21-27 (average 23) \i wide ; carrying o 15 (average 12) f.s., 3 capitate 

 subapical setae and 5 antennal bristles of which the ; long ones are about half as long as the 

 segment and the 2 shorter ones not distin< try different from the f.s. ; with 2 sensilla basiconica 

 ventrally, one near apex and the other more proximal 



Thorax 513-597 (average 566) la long. 



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

 pronotal sclerites medium-sized, without setae. Medial pronotal setae : usually 2 h.s. Post- 



^AOO\i 



F'ig. 2^. Sphaerolecanium prunastri (Fonsc), lateral view. 



