new genera and species of TenebrionidcB. 277 



tured ; flanks of prothorax narrowly transversely rugose 

 near the outer edge ; three first joints of the abdomen 

 finely, longitudinally rugulose. 



Hab. — Australia (Queensland?). One example. 



Onosterrhus, Pascoe, Journ. of Ent. ii. p. 451. 



In this genus (too briefly characterized by its author) 

 the gula sulcus is represented by a more or less strongly 

 impressed line ; the sides of the submentum are produced 

 into a short (but distinct) blunt tooth ; the mentum is 

 trapezoidal, but the sides in front are sometimes very 

 strongly inflexed ; last joint of maxillary palpi triangulate; 

 antenna somewhat slender, the third joint very elongate, 

 8-10 or 9-10 submoniliform, 1 1 ovoid ; head deeply immersed 

 in the prothorax ; front depressed, or concave ; antennary 

 orbits long, very gradually roimded, the sides more or less 

 reflexed and thickened at the edges ; epistoma very short, 

 more or less rapidly widened behind, the margins more or 

 less reflexed and thickened at the edges ; the suture more 

 or less distinct at each side, obsolete at the middle ; pro- 

 thorax moi-e or less strongly transverse, the apex deeply 

 arcuately emarginate, sometimes sinuously so, the sides 

 rather sharply widened to beyond the middle, thence 

 gradually sinuate to the hind angles, margins strongly 

 thickened at the edges and slightly sinuous, Avithin this 

 thickened border the sides are more or less broadly cha- 

 nelled, disc convex, middle of base subtruncate or very 

 slightly rounded, hind angles moderately prominent, more 

 or less acute, outwardly directed, and slightly overlapping 

 the humeral angle of the elytra ; scutellum as in the pre- 

 ceding genus and as in Ni/ctozoilus: elytra very convex, 

 elongate-oval, strongly declivous behind, the apex a little 

 produced, sides narrowly margined and reflexed : legs 

 slender, elongate (in the typical species), rather strongly 

 compressed, tibiae sublinear, the four posterior with a fine 

 tomentose line down the apical half of their inner face or 

 not ; spurs small, the inner one minute ; prosternal and 

 intercoxal process, flanks of mesosternum, metasternum 

 and abdomen as in Nyctozoilus and Hypocilibe. Type, 

 O. IcBvis, Pascoe. 



O. marginicollis, n. sp. 

 Long. 7i lin. ; elytra lat. 4^ lin. — Larger and relatively 

 broader than O. IcBvis ; of a more shining black; head 

 u2 



