PTEOPHOEUS. 465 



b. Antennae more elongate, reaching to the hind angles of the prothorax, or to beyond 



them, in the males, the third joint shorter than the fourth ; prothorax as long 



as, or longer than, broad, with or without vesicles, the latter less prominent ; 



the propleurae yellow beneath them ; presternum not declivous behind. 



c'. Third antennal joint very short, not longer than the second; prothorax with 



moderately large vesicles. 



e". Prothorax in the female with, at most, a small tubercle in the centre at 



the base, the surface moderately coarsely, somewhat sparsely punctate ; 



elytra finely or rather coarsely punctate-striate fulgidus. 



f". Prothorax in the female with a prominent laterally compressed tubercle 

 in the centre at the base, the surface densely, coarsely punctate ; elytra 



coarsely punctate-striate sirius. 



d'. Third antennal joint distinctly longer than the second. 

 g". Prothorax with well-defined vesicles. 



c'". Elytra distinctly divaricate and sharply mucronate at the apex. 



a*. Mesosternum with the sides of the cavity strongly raised behind ; 



prothoracic vesicles small, the hind angles stout caudatus. 



6 4 . Mesosternum declivous ; prothoracic vesicles large and raised, the 



hind angles narrow and abruptly divergent havaniensis. 



d'". Elytra not or feebly divaricate at the apex. 



c 4 . Prothorax with a laterally compressed tubercle in the centre at the 

 base ; elytra conjointly rounded at the apex. 

 a 5 . Antennae extending very little beyond the hind angles of the pro- 

 thorax in the male. 

 a 6 . The prothorax with the vesicles moderately large or small, and 

 distinctly raised, the tubercle at the base elongate and promi- 

 nent ; the elytra moderately long ornamentum. 



b*. The prothorax with the vesicles very large and raised, the 

 tubercle at the base shorter and abruptly raised in front ; the 



elytra less elongate Occident alls. 



b°. Antennae extending considerably beyond the hind angles of the 

 prothorax, and also less dilated, in the male ; the prothorax with 

 the vesicles small and not or very feebly raised, the tubercle at the 



base small mexicanus. t/ 



d\ Prothorax with a conical or transversely compressed tubercle in the 

 centre at the base, the vesicles not prominent. 

 c s . Antennae extending very little beyond the hind angles of the pro- 

 thorax in the male. 

 c 6 . Prothorax densely punctured, the tubercle at the base small; 

 antennae shorter in the male ; elytra obsoletely mucronate at 



the apex physoderus. 



d e . Prothorax more sparsely punctured, the tubercle at the base 

 more prominent ; antennae longer in the male ; elytra finely 

 mucronate at the apex stella. 



biol. cente.-amek., Coleopt., Vol. III. Pt. 1, January 1896. 3 



