62 The Philippine Jourrial of Science ms 



strongly prominent but not large, their posterior margins seen 

 from above straight, not quite touching the pronotal apical 

 angles, ocelli much more distant from one another than from 

 eyes, antenniferous tubercles not visible from above, almost 

 perpendicular, antennae inserted below the eyes, first joint very 

 slightly passing apex of head, second and third joints slender, 

 but a little incrassated at apex, fourth thickened, as long as the 

 two preceding joints together, underside of head on each side with 

 an oblique, more transversal than longitudinal tubercle some- 

 what inside the eyes, bucculse very short, posteriorly not passing 

 the insertion of the antennae; rostrum a little passing base of 

 venter, first joint reaching middle of prosternum. Pronotum 

 neither transversely impressed nor laterally constricted, across 

 the humeri less than three times wider than at apex, the space 

 between the very narrow, smooth, and somewhat sunken cica- 

 tricial areas and the apical margin with a recurved finely 

 impressed line beginning near the apical angle and ending at 

 the corresponding point on the other side, and with a transverse 

 row of punctures immediately behind the apical margin, the 

 straight, apically a little rounded, lateral margins with a very 

 narrow percurrent smooth keel visible only from the side, the 

 broadly rounded basal margin seen from behind very narrowly 

 depressed. Scutellum broader than long, a little convex. Elytra 

 with the costal margins parallel from the base to beyond middle 

 of corium, then a little rounded but not ampliated; clavus with 

 three rows of punctures, corium with two rows of punctures 

 next to the claval suture and sparsely punctate in its exterior 

 half, the apical margin shorter than the claval suture, straight, 

 slightly sinuate in its interior part. Prosternum with a central, 

 impressed, transverse line, which on the sides is curved forward, 

 ending at the apical angles. Metapleura with the posterior 

 border depressed, widened outward, the apical angle acute; 

 orificia transverse, the opening small and round, callosely 

 margined. Abdomen reaching a little beyond apical angle of 

 corium. Fore femora unarmed, not incrassate. First joint 

 of hind tarsi a little shorter than the others together. 



Allied to Pylorgus Stal, but with much shorter bucculae. The 

 description of the latter genus is somewhat incomplete; but as 

 Stal, in comparing his genus with Ischnorh^jnchus, does not 

 mention that the head is much shorter and that the last joint 

 of the antennae and the first joint of the rostrum are much 

 longer, we must infer that they are not constructed as in 

 Rhiophila. 



Type of the genus, Rhiophila breviceps sp. nov. 



