BY THOMAS G. SLOANE. 709 



of these anterior femoral punctures and some variations which I 

 have noted. 



(2) The posterior coxal setce. — The primitive form in the Cara- 

 bidte is probably to have the posterior coxae with three sette, viz., 

 <ine near the anterior margin in a line behind the centre of the 

 middle coxal cavity {^anterior seta); one placed longitudinally 

 behind the anterior seta towards the apex of the coxa (jyosterior 

 seta); and one near the inner margin of the coxa between the 

 insertion of the trochanter and the point at which the two cox^e 

 approximate (inner marginal seta). Among the Australian 

 Bipartiti the posterior coxae are 3-setose in the genus Geoscaphus 

 only; the anterior and posterior setae always occur in the Clivi- 

 nides; while in the Carenides the posterior seta is lost, though in 

 Trichocarenum* Teratidium and Monocentrum a punctiform scar 

 is found in its position, but the seta is wanting (only in a single 

 specimen of Scaraphites lenams have I found the posterior seta 

 present in a Carenid). Often among the Carenides the posterior 

 coxte are without setae (e.g., Neocai^enum, Neoscaphus, Caren- 

 archus, Carenidiu7n gagathiura and closely allied species. 



The subjoined figures show the setigerous punctures of the 

 posterior coxae in the three divisions of the Australian Bipartiti. 



Figs. 8-11. — Posterior Coxae.— 8. Carenum interniptum; 9. Geoscaptus hedssi- 

 miig; 10. Gf. crassu.% 11. Clivina procera. 



Probably some use could be made of other tactile set^e of the 

 legs among the Carenides, e.g., those of the trochanters, middle 

 and posterior femora, &c.; but any attempts I have made to 

 utilise these have yielded only negative results, though the 

 presence or absence, of a setigerous puncture on the posterior 

 trochanters seems not unimportant in the genus Carenum. 



^ In Trichocarenum cmtelnaui, Sloane, alone among the Carenides have I 

 noted the presence of the inner marginal seta. 



