lOlH.I F. H. Ckavely: Passalidae of the WorUl. 23 



( The sidos of tlu' iiK'tasteriniin l)i()a<lly hairy and ])iinctuicd 



\ tlirouj.diDiit • • • • ■'• 



•J\ The hair-hcariii;; |imi(tiiifs of tin' mctasteinnin confined to the 



/ lateral areas and extreme anterior ]>arts of the anterior 



\ intermediate areas . . . . . . • • ■ • ••'• 



_ ^ The clypeus traTisversely trapezoidal . .. .. 0>Uoirhs. p. 'li. 



I The elvpeus transversely linear, straijiht or uiululatin-i .. ^^ 



( The elypeus straight or lightly concave in the middle line . . Oilexs, p. 2'). 



I The elypeus strongly convex in the middle and on either side, 



1 strongly produced backwards at the two points uniting the 



( three curves thus formed . . . ■ • • • • Undulller. p. 25. 



_ \ The central tubercle absent ■ • ■ • '"^pxrius. p. -ifi. 



' ^ The central tubercle present ■■ ■• Popiluis. p. 26. 



iTlie nianiliblos tridentate at apex, the left one with a broadly 

 bifid tootli between the apex and the movable tooth, the 

 viL'ht one with a unidentate tooth in this position (fig. iv. i:}. 

 ,,x p. -24) ; the sides of the elytra hairless .. .- P.-:eiulan,,itln,.<. p. :i>K 



The mandibles bidentate at apex, both of them with a broadly 

 bifid tooth between the apex and the moveable tooth (fig. iv. 

 I 1 0. ]). 21); the sides of the elytra hairv . . . • Prorulrjus. p. 31. 



Genus OILEOIDES, n. gen. 

 Meta.sternuiii with a hioad band of hair-bearing punctures on each side; elypeus 

 expander! as in the more primitive species of PopUius. Otherwise like Popilius. 

 Tvpe. 0. pnrriconus. n. sp. 



Oileoides parvicornis. n. sp. 



Fig. IV. 1. p. Jf. 



Two .specimens from the Cauca Valley, Columl)ia. Length .?7-::S-5 mm. 



The antennae have moderately long "lamellae. The labrum is punctured and hairy, with 

 distinctlv concave anterior margin and conve.x sides, the latter somewhat convergent 

 behind. ' Both mandibles have well developed upper, terminal and anterior lower teeth. 

 The last-mentioned tooth is simple on the right .side ; on the left it is double, sometimes 

 with the anterior of the two parts into which it is (vertically) divided itself divided to a 

 less extent horizontallv. The mentum is smooth in the middle, hairy and punctured 

 laterally : its scars are not very strongly niarked. The elypeus is extensive and flat like 

 that of Spiirins hicorms and dichotowus : it is lightly procurved as in the latter species. 

 The frontal ridges are obsolete, and the central tubercle, though situated on the crest of 

 a straight transverse ungrooved ridge formed by the union of the tw.) parietal ridges, is 

 very small. Between the central tubercle and the obsolete frontal ridges is a triangular 

 area which is somewhat dull and strongly roughene.l. all the rest of the surface of the head 

 being smooth ami glossy. 



