5° 



MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Antennae io-segmented, filiform ; 980-1017 (average 995) y long, i.e. longer than half body 

 length (ratio 1 : 1-52— 1-61, average 157), longer than posterior leg (ratio 1 : 1-14-1 21, average 

 1-17) and longer than penial sheath (ratio 1 : 2-44-2-63, average 2-53). Scape 38-51 (average 

 45) y long and 46-49 (average 48) y wide, with 3 h.s. Pedicel with distinct, polygonal dorsal 

 reticulation ; 46-57 (average 54) y long and 42-48 (average 45) u. wide ; with 3-7 (average 

 5-3) f.s., 1-2 (average 1-4) h.s. and a sensillum placodeum. Segment III club-shaped, 2-4-3-7 

 times longer than wide (72-95, average 82 y long and 23-34, average 29 y. wide) ; with 2-4 

 (average 2-8) f.s. of medium length, 0-9-1-4 (average 1) times as long as width of segment ; 

 with 2-4 usual sensilla basiconica. Segments IV-IX cylindrical ; lengths of these segments 

 (in y) 148-179 (average 162), 152-175 (average 165), 122-171 (average 142), 114-137 (average 

 125), 80-87 (average 86) and 65-74 (average 68) respectively, all of about the same width, varying 

 from 19 to 27 y ; with 17-22 (average 20), 19-24 (average 22), 20-33 (average 24), 22-28 

 (average 25), 15-19 (average 17) and 13-17 (average 15) f.s. respectively, but no h.s. ; antenna/ 

 bristles on segments VIII-IX not markedly different from f.s. Segment X : terminal part 

 not constricted ; 61-72 (average 67) y long and 17-23 (average 21) y wide ; carrying 5-1 1 

 (average 8) f.s., 3 capitate subapical setae and 5 antennal bristles of which the 3 long ones are 

 about half as long as the segment and the 2 shorter ones rather similar to the f.s. ; with 2 

 sensilla basonica ventrally, one near apex and the other more proximal. 



Thorax 505-559 (average 520) y long. 



Prothorax. Pronotal ridge strong, but medially interrupted by weak sclerotization. Lateral 

 pronotal sclerites small, without setae. Medial pronotal setae absent. Post-tergites medium- 

 sized, without striations and without setae. Pleural structures typical of the family. Sternum 

 with strong transverse ridge, median ridge reduced to a basal stalk, and a triangular sclerite. 

 Anteprosternal and prosternal setae absent. 



Fig. 8. Rhodococcus spiraeae (Borchs.), dorsal and ventral view. 



