I'll 8. 1 F. II. (Iraveia : Passalidae of ihc World. 3& 



The genus I'atnihihis. Zang (1905^/, pp- ^25-227, type, P. iiica) i.- pn.bahly allied to 

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

 nietasternuni known to be hairless— a character suggesting possible afiinities with 

 Procdejoides, in the subfamily Passalinae. It resembles Publim 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 ProcuHnae known to ine may he dclinccl thus : — 



The .■lytra separate, their vertical aiiti rioi part ii;ilitly coii- 



cave • • • • • • • • 2. 



I The elytra uiiitfd almii; ihr middle line, tlieir vertical anterior 



partinore or less distinctly convex . .• •• •• •• ''• 



The anterior lower tooth of the left mandible bidentate a.s seen 



from above ; the clypeus always exposed and more or less 



horizontal ; the anterior mar<iin of the ])ronotiim usnally 



biconcave . . • ■ • • • • • • • • • • '-'* 



"^S The anterior lower tooth of the left mandible tridentate as seen 



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



the anterior marjiin of the pronotum straight, or lightly 



biconvex ■• •• •• Tc/r*. p. 40. 



Rudimentary outer tubercles present ; the anterior maruin of 



the pronotum straight .. •• •• •• Arrox,^.'iZ. 



The outer tubercles absent ; the anterior margin of the 



pronotum more or less sinuous or with a strongly sinuous 



marginal groove . . . . • • • • VeUnim, p. So. 



The clypeus entirely hidden : the mandibles tridentate 



distaliy .. •• •■ •■ •• ^K'/'''''--^P-'il. 



The clypeus broadly exposed : the maiulibles usually bidentate 



distaliy •• •• •• •• •• •• ^- 



f The lamellae of the anteiuuie of moderate length : the anterior 



lower tooth of the left numdible broader than that of the 



right ; the sides of the elytra approximately straight ami 



parallel ; the metasternum with distinct lateral areas . . Publius, p.4:!. 



^<^ The lamellae of the antennae abnornuilly long and sleiuler, 



the three together being narrower than any one of them is 



long ; the mandibles synunetrical : the sides of the elytra 



St ronglv rounded : the metasternum witlmnt distinct hiteral 



Pioculus, p. 12. 

 areas . . • • • • • • ' ' 



Onus ARROX, Zang. iqo^h. p. 155. 

 —Sertonu,^. Kauji. 1S71. preociuiiiod. 

 Type, Serforiiis (igasslzl. Katip. 1871. p. 114- 



