OF THE FAMILY COCCIDAE 



5' 



Mesothorax. Mesoprephragma with shallow emargination. Presciitum about twice as wide 

 as long (average 156 and 82 u. respectively) ; anterior margin slightly curved; laterally bounded 

 by the prescutal ridges and posteriorly by the prescittal suture ; sometimes with weak polygonal 

 reticulation. Scutum. Median membranous area subrectangular ; 49-65 (average 59) [x long 

 and 1-81-2-36 (average 2-01) times as wide (width 106-125, average 117 u.) ; without setae. 

 Stutellum large, 76-95 (average 84) u. long and 125-144 (average 135) u, wide, the ratio being 

 1 : 1-5-1-7 (average 1 -6) ; not tubular ; without setae. Postnotum with anterior margin 

 irregular and partly overlapped by the metathoracic fold ; postnotal apophysis and postalare 

 well developed, the latter densely reticulated distally. Mesopostphragnia with moderately- 

 deep emargination. Mesopleuron. Mesopleural ridge strong, but interrupted above coxal 

 articulation ; pleural apophysis and pleural wing process well developed, the latter connected 

 with episternum by a narrow basalare. Subalare small. Episternum not reticulated ; sub- 

 episternal ridge well developed, but below membranous cleft indistinct and only marked by a 

 band of dark sclerotization. Epimeron small. Lateropleurite partly bounded anteriorlv by 

 an extension from marginal ridge, liasisternum large, about 237 fx wide and 160 u. long, i.e. 

 2-4-3-4 (average 2-8) times longer than membranous area of scutum ; with strong median 

 ridge and bounded by strong marginal and precoxal ridges. Eurca well developed. Meso- 

 thoracic spiracle with well developed peritreme ; postmesospiracular setae absent. Tegula 

 small, membranous bulge with a small weak sclerite posteriorly and 2-5 (average 3-2) h.s. 

 Third axillary wing sclerite with a pronounced ventral projection at its base. Additional 

 sclerite well defined. Antemetaspiracular setae absent. 



Metatkorax. Metanotum with thickening of posterior margin desclerotized mediallv ; 

 suspensorial scleriles small, spot-like. Postnotum consisting of a transverse sclerite on each side. 

 Metatergal setae absent. Pleural ridge well developed, though interrupted in the middle ; 

 with small wing process. Episternum with anterior margin ridge-like in parts ; vestigial pre- 

 coxal ridge present ; epimeron produced posteriorly. Metathoracic spiracle similar to meso- 

 thoracic one. Dorsospiracular setae absent. Postmetaspiracular setae : occasionally one h.s. 

 Metasternal plate weak and irregular. Anterior and posterior metasternal setae absent. 



Wings hyaline ; long (1270-1350, average 1310 jx) and of medium width (480-540, average 

 512 (x), ratio width to length being 1 : 2-49-2-65 (average 2-57) ; alar lobe present ; alar 

 setae : 0-3 (average 1-5) h.s. on each wing. Halteres well developed, 114-129 (average 121) jx 

 long and 27-42 (average 37) |x wide, each with 2 (rarely 3) apically hooked setae, which are 

 about 69 (x long. 



Eegs moderately long and slender, with middle pair usually shortest and hind pair longest ; 

 ratio length of hind leg to body length is 1 : 1-72—1-83 (average 1-78). Length of segments 

 (in |x) : 



Leg 



Coxa 



Trochanter 



Femur 



Tibia 



Tarsus 



Claw 



rotal 



I 



65-76 



99-110 



205-228 



308-315 



76-95 



27-30 



798-834 





(68) 



(103) 



(218) 



(312) 



(89) 



(29) 



(819) 



n 



72-84 



95-105 



182-200 



308-317 



91-99 



30-34 



798-820 





(81) 



(IOI) 



(192) 



(3") 



(97) 



(3i) 



(813) 



in 



76-87 



99-1 10 



186-209 



312-352 



103-106 



30-34 



834-882 





(83) 



(104) 



(200) 



(33«) 



(105) 



(32) 



(862) 



Fig. 9. Rhodococcus spiraeae (Borchs.), lateral view. 



