120 REVISION OK SYMPETES AND HELiEUS, ETC., 



evident on the centre of disc. It is the smoothest of all the 

 species in this section. The form, especially the front outline, 

 of the epistoma is unusual. Type in the author's coll. 



PxEROHELiEUS SEPTEMCOSTATUS, 11. sp. 



Elongate-oval, parallel, depressed, opaque-black, the elytral 

 costiB and underside more nitid, antennae and tarsi piceous. 



Head nearly hexacjonal, with front outline of epistoma a little 

 concave and arched, upper surface of the same flat, not reflected; 

 a slight depression (more distinct at sides) separating epistoma 

 from front, eyes rather small, transverse, and widely separated, 

 the whole scabrous or finely shagreened; antennae extending to 

 two-thirds of the prothorax, third joint shorter than fourth and 

 fifth combined, 4-7 successively wider and rounder, 8-10 spherical, 

 eleventh bluntly ovoid. Prothorax moderately convex(3 x 5nim.), 

 length at middle, greatest width behind middle, seniicircularly 

 emarginate at apex, with anterior angles rounded but produced 

 in front of eyes, sides moderately rounded, gently, not sinuately, 

 converging towards the acute backwardly produced posterior 

 angles; base bisinuate, outside border only faintly visible at sides 

 and apex; foliaceous margins wide and horizontal, without 

 distinct gutter separating the disc. Disc in general (not in all 

 specimens) showing faint traces of central channel, with two 

 shallow fovese at base and slight depression in scutellary region, 

 the whole surface scabrous and shallowly punctured, presenting 

 a shagreened appearance, slightly longitudinally rugose anteriorly, 

 smoother on foliaceous margins. Scutellum triangular, finely 

 punctured. Elytra flattish, very little wider than prothorax at 

 base, and three times its length, subparallel throughout the 

 greater part of their length, humeri rather sharply rectangular, 

 foliaceous margins subobsolete and narrowly bordered, each 

 elytionwith three nitid equidistant costse besides the sutural 

 costa, the former parallel for the greater part, the two outside 

 (first and third) costfe approximately converging on apical 

 declivity, the middle one shorter, ending abruptl}'; the sutural 

 costa wider, less raised, continuous to apex, l)ifurcating on each 



