1918.] F. H. Geavely : Passalidae of the World. 33- 



The genus Procululus, Zang (1905a, pp. 225-227, type, P. inca) is probably allied to 

 Publius and Proculus, though in no other genus of Proculinae are the lateral areas of the 

 metasternum known to be hairless — a character suggesting possible affinities with 

 Proculejoides, in the subfamily Passalinae. It resembles Publius in having normal 

 antennae, and Proculus in having egg-shaped elytra. The mandibles appear to resemble 

 those of the last named genus. 



The genera of Proculinae known to me may be defined thus : — 



f The elytra separate, their vertical anterior part lightly con- 



\ cave .. .. .. .. .. ,. .. 2.. 



j The elytra united along the middle line, their vertical anterior 



{ part more or less distinctly convex . . . . . . . . . i 4. 



f The anterior lower tooth of the left mandible bidentate as seen 

 from above ; the clypeus always exposed and more or less 

 horizontal ; the anterior margin of the pronotum usually 

 biconcave . . . . . . . . . . . . . . 3.. 



The anterior lower tooth of the left mandible tridentate as seen 

 from above ; the clypeus steeper, or hidden and rudimentary ; 

 the anterior margin of the pronotum straight, or lightly 

 biconvex . . . . . . . . . . Verres, p. 40. 



Rudimentary outer tubercles present ; the anterior margin of 



the pronotum straight . . . . . . . . Arrox, p. 33. 



The outer tubercles absent ; the anterior margin of the 

 pronotum more or less sinuous or with a strongly sinuous 

 marginal groove . . . . . . . . Veturius, p. 35. 



The clypeus entirely hidden ; the mandibles tridentate 



distally .. •• •• •• •• Platy verres, p. 41. 



The clypeus broadly exposed ; the mandibles usually bidentate 



distally . . • • • • • • • • • • • . 5- 



f The lamellae of the antennae of moderate length ; the anterior 

 lower tooth of the left mandible broader than that of the 

 right ; the sides of the elytra approximately straight and 

 parallel ; the metasternum with distinct lateral areas . . Publius, p. 42. 



The lamellae of the antennae abnormally long and slender, 

 the three together being narrower than any one of them is 

 long ; the mandibles symmetrical ; the sides of the elytra 

 strongly rounded ; the metasternum without distinct lateral 

 areas . . . . . . • • • • Proculus, p. 42. 



1 



\ 



Genus ARROX, Zang, 19056, p. 155. 

 =Sertorius, Kaup, 187 1, preoccupied. 

 Type, Sertorius agassizi, Kaup, 187 1, p. 114. 



