OF PSEUDOCOCCIDAE & ERIOCOCCIDAE 93 



(1967) for Diaspididac and Coccidae respectively, contain all morphological details 

 which could be observed ; some of these might seem unnecessary, but it was done 

 deliberately since the evaluation of the importance of the various characters has 

 yet to be decisively determined. 



PSEUDOCOCCIDAE 



PLANOCOCCUS Group 



PLANOCOCCUS Ferris, 1950 



Planococcus citri (Risso) 



(Text-figs. 4, 5) 



The males of this species were described with varying degrees of accuracy by 

 Newstead (1903), Leonardi (1920), Green (1922), Makel (1942), Jancke (1955), 

 Theron (1958) and Beardsley (i960). 



The winged forms only are known ; living individuals light brown in colour, with much 

 darker thorax and a blackish tinge on the wings. A narrow and slender species, moderately 

 long, with moderately long antennae and legs. When mounted, 966-1232 (ii2o)\t long, 

 266-308 (280) (j. wide at mesothorax and 2142-2380 (2282)^ wing expanse. 



Body setae and derm pores : The antennae and the legs with numerous fleshy and few hair- 

 like setae of subequal lengths, about 31^ long on the antennae and 24a. long on the legs ; the 

 body itself with hair-like setae only, also about 24U. long. Quadrilocular and occasionally 

 trilocular and quinquelocular disc pores, about 6;x in diameter present on the head, the thorax 

 and the abdomen. 



Head : Irregular tetrahedron ; widest across the genae, tapering anteriorly and ventrally ; 

 ventral preocular depression moderately pronounced. Length from apex to postoccipital ridge 

 113-128 (i22)u. ; from apex to neck 153-174 (i65)u. ; width across the genae 183-214 (198)0.. 

 Dorsal arm of midcranial ridge anteriorly sepaiated from the other arms and reaching the 

 posterior margins of the dorsal eyes. Ventral arm anteriorly giving off the two lateral arms of 

 midcranial ridge, forming together a distinct Y-shaped ridge (Text-fig. 4,B). Postoccipital 

 ridge slender, U-shaped and with the anterior ends extending towards, but not reaching the 

 preocular ridges ; this ridge was described by Theron (1958) as two short meniscate ridges 

 but in the specimens examined, the ridge was found medially continuous. Dorsomedial part 

 of epicranium slightly raised. Preocular -j- interocular ridges strong, joining the postocular 

 ridge just below the ocellus ; a sclerotized rudiment of the preocular ridge below the articular 

 process, well marked. Genae membranous. Eyes : Corneae of the dorsal simple eyes 18-24 

 (2i)u in diameter and both separated by 92-104 (95)0. i.e. 3-8-5-6 (41) times their diameter 

 apart. Ventral simple eyes slightly larger, 24-31 (28) u in diameter and 24-43 (31)0. apart. 

 Lateral ocelli well developed. Cranial apophysis apically truncate ; tentorial bridge slender 

 and the anterior tentorial arms fused just before meeting the apophysis. Dorsal head setae 

 7-12 (9-3) on each side of the median line ; each gena always with 3 genal setae. Ventral head 

 setae present in 3 well defined groups on each side : a group of 2-3 (26) setae forming on both 

 sides an irregular longitudinal row between the ventral eyes ; a group of 6—10 (7-9) setae 

 forming with their partners of the other side a transverse band in front of the ventral eyes ; 

 a group of 2-4 (3-2) setae present anteriorly in a longitudinal row on each side of the ventral 

 arm of the midcranial ridge. Head pores : Two dorsal head pores always occur on each side 

 near the base of the antennal scape. 



