223 

 flagellum straight, sclerite at base claw-shaped (Fig. 116b- 



d) (5 dissected) . 



Female genitalia with spermathecal head kidney-shaped, 

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

 question mark, n i" (Fig. 116e) (5 dissected) . 



Presence of stridulatory files on occipital region of 

 head unknown (heads retracted) . Females have foveate 

 punctures on prosternum in front of procoxae; males lack 

 these punctures . 



Variation . Besides the typical specimens of I. 

 septemsignatus with black heads, Gorham described varieties 

 a and (5 from Guatemala which have red heads: a is smaller 

 and more finely punctate than (5. The majority of specimens 

 studied have the head entirely black. Some have the 

 epistome and frons brown, others have the head almost 

 entirely orange. These variations do not correlate with any 

 other characteristic. 



Specimens from Costa Rica, Guatemala, Belize, and 

 southern Mexico (Chiapas and Yucatan) have the subhumeral 

 spot small, free from the base. Specimens from the rest of 

 Mexico (Veracruz, San Luis Potosi, and Hidalgo) have the 

 subhumeral spot elongate, narrowly connected to the base. 



Type . The lectotype (here designated) of Ischyrus 

 septemsignatus Gorham label data: "/ [red circle on white 

 paper] Type/ sp . figured/ Toxpam / Mexico Salle Coll./ 

 B.C. A., Col., VII, Ischyrus 7-signatus Gorham/ [red] 

 LECTOTYPE Ischyrus septemsignatus Gorham des .P .E . Skelley 



