225 



TYRTiEOSELLUS, 11. g. 



Read fairly large, partially concealed from above. Eyes 

 large, widely separated, coarsely faceted. Rostrum more or 

 less parallel-sided, moderately long and curved. Antennae 

 rather thin, inserted nearer apex than base of rostrum ; scape 

 the length of funicle ; funicle with first joint stouter and 

 longer than second, second longer than third; club ovate. 

 Prothorax as long as wide, or feebly transverse, sides rounded, 

 base bisinuate. Scutelluin distinct. Elytra narrow, but dis- 

 tinctly wider than prothorax, usually parallel-sided to beyond 

 the middle. Pectoral canal deep, terminated between four 

 front coxae. Mesosternal receptacle vridely U-shaped, cavern- 

 ous. Metasternum rather long, but shorter than following 

 segment; episterna distinct. Abdomen rather long, two basal 

 segments large, suture between them straight ; three apical 

 segments depressed below the others; third and fourth con- 

 joined slightly longer than second or fifth. T.eg.'i long and 

 thin ; femora feebly grooved, dentate or not, posterior ex- 

 tending, or almost extending, to apex of elytra ; tibiae thin, 

 feebly diminishing in width to apex. Elongate, strongly 

 convex, squamose, fasciculate or not. 



In my table of genera allied to Grytorhynclius (5) would 

 be placed in I. Of the genera placed there in appearance 

 they are nearest to Pezichus, but the hind femora do not pass 

 the elytra (in coxalis and nigrofasciatus they extend to the 

 apex, in attenuatus and alternatus almost to the apex). The 

 rostrum although fairly long in the females is shorter than in 

 Pezichus. The species are all very small in comparison with 

 those of that genus. In the table referred to, under ii, two 

 genera are placed as having edentate femora, and four as 

 having dentate femora. I believe the four species referred 

 to the present genus are truly congeneric, despite the facts 

 that two have dentate, and two edentate, femora. The 

 species with edentate fem.ora differ from those referred to 

 k in the table, Queenslandica, (now Orochlesis) and Sclero- 

 poides, in the narrower and more convex body, longer legs 

 and much narrower tibiae; from those referred to kk the 

 straight suture between the two basal segments of abdomen 

 associates them with Tyrtceosus. The only valid distinguish- 

 ing feature that I can find between these species and 

 Tyrtatosus lies in the tibiae. In these species the tibiae are 

 long, thin, and gradually decrease in width from near the 

 base to the apex, or at any rate the hind pair so decrease. 

 In Tyrtceosiis the tibiae are either of even width throughout, 

 or they dilate in width to the apex, the hind pair usually 



(5) Proc. Linn. Soc. N.S. Wales 1907, pp. 401-403. 

 I 



