OF THE FAMILY COCCIDAK 161 



Halteres and suspensorial sclerites absent, metapleural ridge reduced ; fleshy 

 postmetaspiracular setae present ; abdominal segment 111 with no hair-like 

 setae medially ; pleural sclerotizations of penial sheath narrowly joined anterior 

 to anus PHYLLOSTROMA (P. myrtilli (Kalt )) 



Halteres and suspensorial sclerites present, metapleural ridge complete ; fleshy 

 postmetaspiracular setae absent ; abdominal segment 111 usually with 2 setae 

 medially, rarely one ; pleural sclerotizations not joined anterior to anus . . 7 



With 1-4 (average 2-7) scutal setae ; with only one haltere seta on each side ; with 

 2 hair-like setae dorsally on abdominal segment I ; penial sheath medium-sized, 

 the ratio of its length in relation to body length being 1 : 5-09-5-63 (average 5-39). 



PALAEOLECANIUM (P. bituberculatum (Targ.)) 



With no scutal setae ; with more than one haltere seta on at least one side (usually 

 2, range 1-4) ; usually with no hair-like setae dorsally on abdominal segment I, 

 occasionally with one ; penial sheath very long, the ratio of its length in relation 

 to body length being 1 : 315-413 ........ 8 



Dorsal part of midcranial ridge absent ; with 8 simple eyes ; apex of cranial 

 apophysis truncate ; antenna longer than half bodv length, the ratio oi its length 

 in relation to body length being 1 : 1-52-1-61 (average 157) ; antenna also 

 2-4-2-6 (average 2-5) times longer than penial sheath ; 3rd antenna! segment 

 without hair-like setae ; scutellum 1 5 1 7 (average 1 -6) times wider than long ; 

 legs moderately long, the ratio length of hind leg to body length being 1 : 172- 

 1-83 (average 1-78) ; claws long, hind claw about i\ times as long as width of 

 tarsus ; abdominal tergites and sternites absent on segments 1 V and V ; abdom- 

 inal segment II usually with none, but occasionally with one median hair-like seta 

 ventrally . . . RHODOCOCCUS (R. spiraeae (Borchs.)) 



Vestigial dorsal part oi midcranial ridge present ; with 4, 6 or 10 simple eyes ; 

 apex of cranial apophysis bifurcate ; antenna shorter than half body length, the 

 ratio of its length in relation to body length being 1 : 2 02 2-02 ; antenna only 

 1-3-2-1 times longer than penial sheath ; 3rd antennal segment with one or 

 more hair-like setae ; scutellum 1-8-2-3 times wider than long ; legs short, tin- 

 ratio length of hind leg to body length being 1 : 2-07-2-47 ; claws medium-sized, 

 as long or a little longer than width of tarsus ; tergites and sternites present on 

 all abdominal segments ; abdominal segment II with 2 median hair-like setae 

 ventrally ............. 9 



With 4 simple eyes ; mesoprephragma without an emargination ; prescutum with 

 distinct polygonal reticulation ; basisternum 1-7-2-4 (average 21) times longer 

 than membranous area of scutum ; alar setae absent ; coxal bristles absent ; 

 apical seta on trochanter 2-1-2-6 (average 2 4) times as long as width of trochanter ; 

 abdominal segments VI and VII usuallv with 2 setae on both segments; basal rod 

 short, length |-| that of aedeagus PHYSOKERMES (P. piceae (Schr.)) 



With 6 or 10 simple eyes ; mesoprephragma with shallow- emargination ; prescutum 

 with weak or no reticulation ; basisternum 2-5-3-6 times longer than mem- 

 branous area of scutum ; alar setae present on at least one side (range 0-3) ; 

 coxal bristles present ; apical seta on trochanter 3-4 times as long as width of 

 trochanter , abdominal segments VI and VII usually with 4 setae on both 

 segments ; basal ridge medium-sized, length ■£-$ that of aedeagus . . . 10 



Degree of sclerotization of postocular ridge not reduced posteromedially ; with 6 

 simple eyes ; genae not reticulated ; antenna longer than posterior leg, ratio 

 1 : 1-04-1-14 (average i 07) ; 3rd antennal segment 2-5-3-0 (average 2-8) times 

 longer than wide ; basisternum usually with 1 or 2 hair-like setae ; setae of 

 glandular pouch with external part about twice as long as the section within the 

 pouch ; basal rod extending -ft-ths of the length from aedeagus to apex of basal 

 membranous area .... NEMOLECANIUM (N. abietis Borchs.) 



