NO. 1.] E.P. Stebbing — On the Bostrichidae of thelndian Region. 37 



ger found an immature and dead specimen in the sapwood of 

 Canarium australianum. M. Olliff calls it a ' bark borer ' and says it 

 attacks the pepper-tree and the White Cedar. 3 



Genus Heter6bostrichus 9 Lesne. 



Body cylindrical or a little depressed. Head without constriction 

 at the level of the posterior edge of th^ eyes. Anterior angles of 

 the epistome pointed, straight or obtuse (// aequalis). Under lip 

 trapezoid, simple in the two sexes. 1 he articulations of the antennal 

 club without well-defined velvety patches Prothorax markedly nar- 

 rower in front, slightly hollowed out above the middle of its anterior 

 edge. Elyti a without prominent dorsal nervures, not granulated or 

 toothed at their lower apical edge, their marginal grooves sharply 

 terminated before the apex, Meso and metasternum are in contact 

 on the outside edge of the intermediate coxa. The intercoxal projec- 

 tion of the first abdominal segment, showing a flat ventral facette. 

 Fifth segment of the abdomen simple. No long stiff hairs on the 

 external edge of the tibiae. 



The species of this genus inhabit the warm portions of the Old 

 World. They belong to four well-marked divisions which have the 

 following characters : — 



Group /.—The frontal-clypeal suture obsolete. No re-entering 

 angle at posterior edge of the eyes. Posterior angles of the prothorax 

 generally rounded. Anterior, tarsi with a fringe of light coloured 

 hairs on the inner edge. 



Heteromorphous 6 . Forehead, simple; with a rectilinear profile 

 Prothorax large with a prominent hook at each anterior angle. The 

 posterior surface of the pronotum furnished with a sculpture resem- 

 bling imbricate scales. On each side of the upper edge of the apical 

 declivity of the elytra there are two tubercles of which the inner 

 one is hook-like. 



$ . Forehead furnished with a velvety giobosity which encroaches 

 on the epistome. Prothorax smaller, slightly indented on its exterior 

 edge, its interior edges marked but not prominent. Apical declivity 

 of the elytra without marginal tubercles. 



Homeomorphous 6*. Forehead as in $; differs from heteromor- 

 phous <J in having the uncus of the anterior angles of the prothorax 

 at times replaced by a simple upturned tooth. 



Two species are known. — H. unicornis and H. pileatus — both 

 Indian. 



1 Vide note on this insect in Inj. Ins. Ind. For. p. 42 (1899). 



2 Insect Life, IV, Nos. 9-10, 1892, p. 294. 



