249 



Campeche, Chicana Ruins, 6mi . E. Xpujil, 13-14-VII-1983, 



700' elev., R. M. Anderson, W. Maddison, trop. seas. for. 

 [1, UASM] ; Oaxaca, Temascal, 29-VI-1964, A. G. Raske, at 

 light [1, CNCI] . 



Distribution . Known only from Mexico (Fig. 123) . 



Taxonomic notes . This unique species is provisionally 

 placed in Ischyrus because it possesses most of the generic 

 characters as stated in the Generic Account. It differs 

 from other Ischyrus in its antennal club structure, 

 prosternal pit, and genitalic characters. 



Ischyrus n. sp . 2 



Diagnosis . Unique in the black pronotum with orange 

 sides, large triangular central elytral marking, and 

 asymmetrical antennal club segments. 



Description . Length: 8.6-9.1 mm; Width 4.5-4.7 mm. 

 Body elongate, widest at basal third of elytra; weakly 

 microreticulate, shining; yellow-orange with black color 

 pattern (Fig. 26) . 



Head solid black with dark orange base (hidden when 

 head retracted) . Pronotum edged in black; black triangular 

 central mark broadly connected to base and anterior margin, 

 anteriorly narrowed. Scutellum black. Each elytron with 

 small free subhumeral spot; V-shaped scutellar spot, 

 connected to suture, not to base; central spot large and 

 triangular, widest anteriorly and angled forward, nearly 

 reaching apical edge along suture; central spots form a V- 

 shaped mark with elytra together; suture with fine black 



