REVISION OF THE NYCTOZOILIDES. 155 
ONOSTERRHUS BEANEX n. ap. 
Elongate-ovate, elytra sub-parallel, opaque brown-black above, 
underside nitid, tarsi and apical joints of antennae red. Head — 
Epistoina rounded in front, slightly sinuate at sides, a little 
hollowed and reflexed in front of eyes, canthus briefly rounded 
and raised, limiting suture transverse and straight, forehead rather 
flat, whole head minutely but clearly punctate, punctures most 
evident on epistoma. Antennas — Third joint shorter than the 
fourth and fifth combined, joints 4-7 obconic, 9-10 nearly round, 
eleventh ovoid and larger than tenth. Prothorax 4.5 x 6.5 mm. 
(length measured in middle), little wider at base than at apex, 
widest behind the middle, sinuate at base, anterior angles deflexed, 
acute, with extreme ends rounded, sides diverging and parabolic-ally 
curved to beyond the middle, then sinuately contracting near the 
acute posterior angles; all angles pointing obliquely outwards; 
extreme margins strongly thickened and nitid at sides, moderate 
on front of anterior angles, very narrow at base, obsolete at 
apex ; disc quite smooth and impunctate, convex near base, widely 
explanate laterally, hollowed near anterior angles, impressed at 
base near posterior angles. Scutellum transverse and raised, with- 
out any sutural depression on elytra behind scutellum. Elytra 
11x 7.8 mm. ; of same width at base as prothorax, very convex, 
humeri obsolete, gradually widening at first, then sub-parallel for 
the greater part of length, apical declivity moderate, extreme 
margins very narrowly horizontal and evident from above through- 
out ; disc apparently quite smooth (under a, strong lens seen to 
be minutely streaked), with the faintest suggestion of smooth 
costee, and the usual row of large lateral punctures. Abdomen with 
basal segments faintly striolate, intercoxal process truncate and 
wide, presternum convex, transversely striate, its process 
channelled, and rounded at apex. TibiaB with very short spurs, 
posterior without line of tomentum, apex of the same and under- 
side of tarsi clothed with yellow tomentum, submentum with a short 
knobbed lateral tooth, gula strongly and closely punctate and 
deeply impressed, the impression forming a triangular plate at the 
junction with prothorax, its apex pointing forward. 
Dimensions : 16 x 7.8 mm. 
Habitat: West Australia, on line of surveyed railway between 
Kalgoorlie and South Australia. 
