56 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Metathorax : Metapostnotal sclerites medially connected by the transverse metapostnotal 

 ridge ; the latter, which appears to be of taxonomic importance, was overlooked by Theron 

 (1958). Metapleural ridge attenuates near the middle at a small pleural apophysis ; the 

 metapleural ridge dorsally merges into a small metapleural wing process. Metepisternum 

 dorsally supports the precoxal ridge of metathorax ; metepimeron irregularly triangular. Meta- 

 sternal apophysis, whose absence was emphasized by Theron (1958) and regarded as a specialized 

 feature of the lecanoid type of male (which includes P. cilri as a representative of Pseudo- 

 coccidae), is definitely present. Metathoracic spiracle identical with the mesothoracic. Meta- 

 thoracic setae on each side : A submedian group of 3 metatergal setae always present ; meta- 

 pleural setae usually absent, but one seta was found in one specimen (av. 01) ; anterior 

 metasternal setae 1-2 (1-9) forming, with their partners of the other side, a short median trans- 

 verse row ; posterior metasternal setae 1-2 (17) in a similar arrangement. Metathoracic pores : 

 Metaspiracular pores 1-2 (11) behind each spiracle, and one anterior metasternal pore may 

 occur on either side (av. 0-5) ; posterior metasternal pores absent. 



Wings : 938-1050 (1008) jjl long and 378-476 (420)0. wide ; usually with 3 alar setae (4 setae 

 observed in one occasion, av. 31); a compact row of 2-3 (2-2) minute circular sensoria also 

 apparent. Hamulohalterae 70-76 (74) (x long and about 15U, wide; with a weak ridge and an 

 apical, 61-67 (64) [i l° n g hooked seta, i.e. the seta slightly shorter than the hamulohaltera, the 

 ratio their lengths being 1 : 11-1-2 (1*15). 



Legs : Comparatively long and moderately stout ; the ratio length of the hind leg to the 

 total body length 1 : 1-3-1-7 (i-6). Coxa and trochanter about 46 and 24(1 wide ; the proximal 

 part of the latter longer than the distal and with 3 circular sensilla on each side. Femur about 

 37 [/. wide ; that of the fore leg shortest and that of the hind leg longest ; the ratio width to 

 length of the hind femur 1 : 5-2-5-8 (5-4). Tibia 2iu. wide ; with 2 strong apical spurs and 

 2-4 smaller spines ; in front leg, the femur shorter than the tibia, the ratio their lengths 

 1 : I-I-I-2 (113). The distal segment of the tarsus about 2I[a wide ; tarsal digitules apically 

 knobbed, 34-40 (37) (x long. Claw gradually tapering ; ungual digitules extremely fine, about 

 I5[x long. The following table shows the lengths of the leg segments in microns and the 

 number of fleshy and hairlike setae on each : 



200 -~ 



100. 



Fig. 5. Planococcus citri (Risso), lateral view. 



