106 

 Mesosternum basal width = 1.5 x mesocoxal line length; 



coxal lines straight; base sinuate. Metasternum coxal lines 

 often recurved, not meeting at middle; coxal lines short, 

 barely surpassing coxa; line behind mesocoxa deep, groove- 

 like; sternum with medial punctures fine, lacking lateral 

 punctures . 



First visible abdominal sternite with coxal lines 

 barely surpassing coxa or reaching up to 0.5 distance to 

 posterior margin; rounded between metacoxae; coarse 

 punctures laterally, fine punctures medially. 



Male genitalia with median lobe strongly arched, 

 apically truncate, constricted just before tip; internal sac 

 without noticeable sclerotized structures; flagellum long 

 and narrow, length = 1.5 x median lobe length (Fig. 83a); 

 base of flagellum angled, sclerite at base claw-shaped (Fig. 

 83b-d) (8 dissected) . 



Female genitalia with spermathecal head kidney-shaped, 

 often with top-knot; tail swollen, curved like an inverted 

 question mark, n i" (Fig. 83e) (7 dissected) . 



Stridulatory files on occipital region of head not 

 visible, presence unknown (heads retracted) . Females have 

 foveate punctures on prosternum in front of procoxae; males 

 lack these punctures. 



Variation . Gorham' s I. peruvianus differs from I. 

 boucardi Crotch only in the head being entirely black and 

 the subhumeral spot not connected to the scutellar spot. 

 Both of these characters are variable and several 



