229 



internal sac without noticeable sclerotized structures; 



flagellum long and narrow, length = 1.4 x median lobe length 

 (Fig. 117a) ; base of flagellum gradually curved, sclerite at 

 base claw-shaped (Fig. 117b-d) (2 dissected) . 



Female genitalia with spermathecal head kidney-shaped, 

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

 question mark, "£," (Fig. 117e) (1 dissected) . 



Presence of stridulatory files on occipital region of 

 head unknown (heads retracted) . Female with foveate 

 punctures on prosternum in front of procoxae; males lack 

 these punctures . 



Variation . The amount of contact between the central 

 elytral band and the lateral margin is variable: not 

 touching in the Panama holotype and Brazil specimens; nearly 

 touching in the Peru specimen; broadly connected in the 

 Ecuador specimen. 



The female from Brazil has the maxillary palp terminal 

 segment wider (length = 0.5 x width), angles acute (similar 

 to Fig. 7j); central elytral marking extended posteriorly 

 along suture; apical elytral spot smaller than the pronotal 

 spots. The other specimens studied have maxillary palp 

 terminal segment narrower (length = 0.66 x width); angles 

 nearly 90° (similar to Fig. 7e) ; central elytral marking 

 band-like, not extending along the suture; the apical spot 

 larger than the pronotal spots. The Brazilian female may 

 represent a distinct taxon, but without adequate material 

 and a male, it is considered a variety of I. tetrasticus. 



