239 



Female genitalia with spermathecal head kidney-shaped, 



often with top-knot; tail small and narrow, looped (Fig. 

 119e) (3 dissected) . 



Presence of stridulatory files on occipital region of 

 head unknown (heads retracted) . Females have few foveate 

 punctures on prosternum in front of procoxae; males lack 

 these punctures. 



Variation . Posterior free pronotal spots are small, 

 almost lacking on one specimen from Panama. The others have 

 the posterior pronotal spots nearly equal in size to the 

 anterior spots. 



The holotype has the central and lateral spot of the 

 elytra fused, forming a wavy marking (illustrated in Gorham 

 1887) . All other specimens studied have these spots 

 separated. No additional differences were observed between 

 the type and these specimens. 



Type . The holotype (by monotypy) of Ischyrus undulatus 

 Gorham label data: V [red circle on white paper] Type/ 

 Bugaba Panama Champion/ Ischyrus undulatus Gorham/ B.C. A., 

 Col., VII, Ischyrus/" [NHML, studied]. Sex not determined. 



Specimens examined . The holotype and 8 specimens, 

 representing 8 collection records, were studied. Label 

 data: Panama, Canal Zone, Barro Colorado Island, 1-9-V-1964, 

 W. D. Duckworth [1, USNM] ; same data, 20-23-V-1964 [1, 

 USNM] ; same locality, 15-27-V-1972, T. Erwin, light at field 

 station [1, USNM]; Canal Zone, Coco Solo Hospital, 9°21'N, 

 79°51'W, 9-VI-1972, Engleman [1, CSUC] ; Canal Zone, 



