191 8 -3 F, H. Gravely : Passatidae of the World. 23 



The sides of the metasternum broadly hairy and punctured 



throughout . . q 



The hair-bearing punctures of the metasternum confined to the 



lateral areas and extreme anterior parts of the anterior 



intermediate areas . . k 



| The clypeus transversely trapezoidal . . . . . Oileoides, p. 23. 



( The clypeus transversely linear, straight or undulating . . . . . . 4. 



( The clypeus straight or lightly concave in the middle line . . Oileus, p. 25. 

 The clypeus strongly convex in the middle and on either side, 

 strongly produced backwards at the two points uniting the 

 three curves thus formed . . . . . . . . Undulifer, p. 25. 



The central tubercle absent . . . . . . Spurius, p. 26. 



The central tubercle present . . . . . . Popilius, p. 26. 



The mandibles tridentate at apex, the left one with a broadly 

 bifid tooth between the apex and the movable tooth, the 

 right one with a unidentate tooth in this position (fig. iv, 13, 

 p. 24) ; the sides of the elytra hairless .. .. Pseudacanthus, p. 30. 



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

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

 16. p. 21) ; the sides of the elytra hairv . . . . Proculejus, p. 31. 



Genus OILEOIDES, n. gen. 



Metasternum with a broad band of hair-bearing punctures on each side ; clypeus 

 expanded as in the more primitive species of Popilius. Otherwise like Popilius. 

 Type, 0. parvicornis, n. sp. 



Oileoides parvicornis, n. sp. 



Fig. IV, l,p. 24. 



Two specimens from the Cauca Valley, Columbia. Length 27-28-5 mm. 



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

 distinctly concave anterior margin and convex 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 horizontally. The mentum is smooth in the middle, hairy and punctured 

 laterally ; its scars are not very strongly marked. The clypeus is extensive and flat like 

 that of Spurius bicomis and dichotomy s ; 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 two parietal ridges, is 

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

 area which is somewhat dull and strongly roughened, all the rest of the surface of the head 

 being smooth and glossy. 



