86 MORPHOLOGY AND TAXONOMY OF ADULT MALES 



Preoral ridge absent. Tendon-like apodeme short. Cranial apophysis long ; apex truncate, 

 occasionally bifurcate, extending to around the level of the anterior margin of the ventral eyes. 

 Mouth opening irregular. Anterior tentorial pits present, situated anterolateral to mouth 

 opening. 



Antennae io-segmented, filiform ; 729-901 (average 822) y. long, i.e. longer than half body 

 length (ratio 1 : 1-28-1-56, average 139), longer than posterior leg (ratio 1 : 1-36—1-40, average 

 1-38) and longer than penial sheath (ratio 1 : 4-36-6-02, average 4-87). Scape 36-46 (average 

 41) u. long and 36-40 (average 38) y. wide, with 3 h.s. and occasionally one f.s. Pedicel with 

 weak, polygonal, dorsal reticulation ; 42-49 (average 45) y. long and 31-34 (average 33) y. wide; 

 with 5-10 f.s., 1-5 (average 3-6) h.s., and a sensillum placodeum. Segment III somewhat club- 

 shaped, 3-0-3-7 (average 3-3) times longer than wide (68-84, average 75 jx long and 23 \i wide) ; 

 with 0-2 (average 0-7) h.s. and 1-6 (average 3-3) f.s., the latter of medium length, 1-2-1-6 

 (average 1 4) times longer than width of segment ; with 1 or 2 usual sensilla basiconica. 

 Segments IV-IX cylindrical ; lengths of these segments (in \i) 1 14-158 (average 131), 105-137 

 (average 122), 95-137 (average 118), 82-106 (average 97), 67-82 (average 74) and 57-72 

 (average 63) respectively, widths varying from 15 to 23 u., with segment IX somewhat wider than 

 proximal ones ; with 11-24 (average 18), 13-25 (average 20), 20-30 (average 23), 18-28 

 (average 22), 13-19 (average 16) and 12-20 (average 16) f.s. respectively, but no h.s. ; antennal 

 bristles on segments VIII and IX not always distinctly different from f.s. Segment X : terminal 

 part not constricted ; 46-61 (average 54) \i long and 19-23 (average 20) [i wide ; carrying 

 4—14 (average 8) f.s., 3 capitate subapical setae and 5 antennal bristles of which the 3 long ones 

 are about £ as long as the segment and the 2 short ones shorter than the f.s. ; with 2 sensilla 

 basiconica ventrally, one near apex and the other more proximal. 



Thorax 357-424 (average 387) \x long. 



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

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

 small, weakly sclerotized, with irregular wavy strictions, without setae. Pleural structures 

 typical of family. Sternum with transverse ridge narrowed medially, median ridge represented 

 by a short basal stalk, and triangular sclerite weakly sclerotized, with lines arching latero- 

 anteriorly from basal stalk ; a small apophysis sometimes present anterior to this sclerite. 

 A ntepro sternal setae frequently absent, but sometimes up to 2 present on each side ; prosternal 

 setae : 0-25 (average 14), but usually 12-21 f.s. and 0-1 (average 0-5) h.s., none of these occurring 

 anterior to spiracles. 



Mesothorax. Mesoprepkragma short, with shallow emargination. Prescutum about twice as 

 wide as long (average 116 and 60 y. respectively) ; anterior margin curved ; laterally bounded 

 by strong prescutal ridges and posteriorly by the prescutal suture ; slightly more heavily sclero- 

 tized medially ; polygonally reticulated. Scutum. Median membranous area subrectangular ; 

 49-72 (average 60) ji long and 1-42-1-92 (average 1-70) times as wide (width 97-114, average 

 102 u.) ; with 3-8 (average 4-7) h.s. Anterior arms of scutum irregularly reticulated. 

 Scutellum 29-34 (average 32) |j. long and 95-114 (average 102) [t wide, ratio being 1 : 30-3-8 

 (average 3-4) ; tubular, with small ventral foramen ; usually without setae. Postnotum with 



Fig. 28. Luzulaspis luzulae (Dufour), lateral view. 



