OF PSEUDOCOCCIDAE & ERIOCOCCIDAE 



133 



Thorax : 426-570 (524)^1 long. Prothorax : Pronotal ridge medially interrupted at a weak 

 point. Lateral pronotal sclerites and post-tergites comparatively large. Proepisternum with a 

 ridge-like dorsal margin. Prosternum triangular, 37-49 (43) \t long ; prosternal ridge 85-116 

 (ioi)jjl long. Prothoracic setae on each side of the median line : Medial pronotal setae 0-2 

 (09) f.s. and 0-3 (1-3) h.s. ; lateral pronotal setae 0-1 (0-3) h.s. ; post-tergital setae 3-6 (4-6) f.s. ; 

 antespiracular dorsal setae 0-2 (0-5) h.s. One, hair-like antespiracular ventral seta always 

 present. Prosternal setae 1-3 (2-1) f.s. and 1-3 (i-8) h.s. Prothoracic disc pores on each side : 

 Medial pronotal pores 2-4 (26) ; lateral pronotal pores 2-4 (3-1) ; antespiracular dorsal pores 

 2-4 (2-1). Prosternal pores 1-3 (2-1). 



Mesothorax : Prescutum 73-92 (79)0. long and 113-146 (i3i)(x wide, the ratio being 1 : 15- 

 i-8 (1-7) ; prescutal ridge well developed and prescutal suture well defined. Scutum heavily 

 sclerotized antero-laterally, with a longitudinal median narrow membranous area. Scutum 

 101-128 (ii6)[a long, i.e. the ratio lengths of prescutum to scutum 1 : 1-3-1-6 (1-5). Scutellum 

 46-61 (55) [i long and 89-119 (107)^1 wide, the ratio being 1 : 1-8-2-1 (1-9), and the ratio its 

 length to the length of scutum 1 : 2-0-2-2 (21). Anterior and posterior postalar ridges well 

 separated ; postnotal apophysis well developed. Mesopleuron : Mesopleural ridge interrupted 

 above the articulation with coxa ; pleural apophysis, pleural wing process, basalare and 

 subepisternal ridge well developed ; later opleurite narrow, mesepisternum and mesepimeron 

 distinct. Mesosternum : Basisternum 128-171 ( 1 50) \i long and 168-271 (192)^1 wide ; marginal, 

 precoxal ridges and furca strongly developed. Mesothoracic spiracle 21-24 l 22 )^ wide at 

 opening, with a 34-43 (40) u. long supporting bar. Mesothoracic setae on each side : prescutal 

 setae 4-6 (4-7) h.s. ; scutal setae 4-7 (52) h.s. ; sculellar setae 2-4 (26) h.s. Tegular setae 

 3-5 (3-7) h.s. ; postmesostigmatal setae 1-3 (i-6) f.s. and 2-4 (2-6) h.s. occurring only laterally 

 behind each spiracle. Basisternal setae 7-12 (9-1) h.s. Mesothoracic disc pores : 1-2 (i-6 

 mesospiracular pores posteriorly associated with each spiracle. 



Metathorax : Metapostnotal sclerites and metapostnotal ridge well developed. Pleural ridge, 

 pleural wing process, pleural apophysis, episternum and epimeron typical of the family. Precoxal 

 ridge and metasternal apophysis well developed. Metathoracic spiracle identical with the 

 mesothoracic. 



Metathoracic setae on each side : Metatergal setae 1-2 (1-2) f.s. and 3-4 (3-3) h.s. in a sub- 

 median cluster ; metapleural setae 1-2 (i-i) f.s. behind the metathoracic spiracles. Anterior 

 metasternal setae 1-2 (1-5) f.s. and 1-3 (21) h.s. ; posterior metasternal setae absent. Meta- 

 thoracic disc pores on each side : Metaspiracular pores 0-1 (0-7) ; anterior metasternal pores 

 1-2 (i-6) ; posterior metasternal pores absent. 



200 -^ 



Fig. 22. Pseudococcus obscurus (Essig), lateral view. 



