98 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



On Solatium sp. and on Rhapes sp., in the gardens of Manial Palace, Cairo, Egypt, 

 U.A.R., during the second and third weeks of August, 1964. 



On Croton sp., in the Botanic gardens of Zohreya (greenhouses), Cairo, Egypt, 

 U.A.R., also during the second week of August, 1964. 



On potato sprouts received from Dr. D. J. Williams, 30.1.1965. The culture 

 was sent from Angola, West Africa where the insect was reported causing tremendous 

 damage to potatoes. Dr. Williams, although he identified the females as P. citri, 

 was somewhat doubtful ; the pleural prothoracic group of ducts, normally found 

 anterior to, and around the spiracles in this species, were absent. When the males 

 were mounted and examined, they completely agreed with the typical specimens. 



Planococcus kenyae (Le Pelley) 

 (Text-fig. 6) 



The macropterous forms only are known ; narrow and slender, of medium size, with 

 comparatively short antennae and long legs. Mounted specimens 1092-1204 (1162)0. long, 

 252-294 (280)0. wide at mesothorax and 2352-2576 (2478)0 wing expanse. 



Body setae and pores : Antennae and legs with numerous fleshy and a few hair-like setae, 

 about 310 long on the former and 240 on the latter ; the body itself with hair-like setae only, 

 about 240 long. Quadrilocular and sometimes trilocular or quinquelocular disc pores, about 

 60 in diameter, present on the head, thorax and abdomen. 



Head : Subtetrahedron ; subtriangular in dorsal and front views ; ventral preocular 

 depression well pronounced in lateral view. Length from apex to postoccipital ridge 113-134 

 (122)0 ; from apex to neck 153-174 (168)0 ; width across the genae 180-207 ( I 95)( jl - Dorsal 

 arm of the midcranial ridge anteriorly detached from other arms, and almost reaching the 

 posterior level of the dorsal eyes. Ventral and lateral arms forming together a Y-shaped ridge. 

 Postoccipital ridge U-shaped, not reaching the preocular ridges anteriorly. Dorsomedial part 

 of epicranium slightly raised. Preocular + interocular ridges well developed, posteriorly fused 

 with postocular ridge below the ocellus. A distinct ventral rudiment of the preocular ridge 

 present below the articular process. Preoral ridge slender. Eyes : Dorsal simple eyes not 

 projecting beyond the outer margins of the head ; their corneae 21-27 ( 2 4) a m diameter, and 

 both separated by 85-98 (92)0, i.e. 3-5-4-0 (3-8) their diameter apart. Ventral simple eyes 

 larger and much closer, 27-34 (31)0 in diameter and 18-24 (21)0 apart. Lateral ocelli well 

 developed. Ocular sclerite traversed by the interocular ridge. Cranial apophysis apically 

 truncate. Tentorial bridge slender. Dorsal head setae 9-12 (10-2) on each side anterior to the 

 postoccipital ridge ; each gena usually with 3 and occasionally 2 (av. 2-8) genal setae. Ventral 

 head setae on each side : 2-4 (3-4) between the ventral eyes ; 7-10 (8-6) in the area of the 

 ventral preocular depression, forming with their partners of the other side a transverse band ; 

 anteriorly, 3-4 (3-3) in a longitudinal row on each side of the ventral arm of the midcranial 

 ridge. Head pores : Usually 2 pores, and occasionally 3 or 4 (av. 2-3), present dorsally near 

 the base of each antenna. 



Antennae : Filiform ; 10-segmented ; 509-641 (577)0 long, i.e. about half the body length, 

 the ratio being 1 : 1-8-2-2 (2-0), and slightly shorter than the hind leg, the ratio 1 : i-i— 1-3 

 (1-2). Scape 37-43 (40)0 long and 34-40 (37)0 wide at base ; with 5-7 (5-9) h.s. Pedicel 

 55-64 (60)0 long and 31-37 (34)^ wide at widest ; with 12-23 (17-3) f.s., 6-n (89) h.s. and a 

 sensillum placodeum. Flagellum : Segment III club-shaped, longest of all (the ratio its length 

 to the length of segment X 1-1-1-3, av. 1-2 : 1) and about 210 wide (the ratio its width to its 

 length i : 3-8-5-2, av. 4-3). Segments IV to X cylindrical and 18-21 (20)0 wide (the ratio 



